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• Why am I getting 'File in use by Another User' and 'Application Sharing Violation' errors when trying to open & and save files?

  - by GollyJer

  We're getting this a lot lately. Windows 2008 Server Windows 7 & Vista Client PC's Microsoft Office 2007 When a user tries opening a file on our network drive (word doc, excel spreadsheet, etc) the software reports the file is locked by 'another user' even when it's not. They're also seeing random 'Sharing Violation' errors when trying to save files to the network. Possibly the same manifestation of the problem shows up when a user tries saving a local, on their own drive, non-network files and they get 'Can not save due to a Sharing Violation'.

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• Is it possible to change User's Home Directorys permission in OSX?

  - by Sosiska

  Most of your staff uses OSX as main operation system. The problem is that recently we were attacked with some odd malware: users are getting zip-file via mail, and when they open this zip file, they execute a binary keylogger malware, that is inside this zipped file. (One click is enough). We have some non-technical limitations and due this limitation we can't configure user's mail servers. But actually we have physical access to their laptops. As far as I know, there is possible to mount user's home directory without "x" (execution) permission in Linux and *BSD. So users can't run some binary file inside home directory. Is it possible to configure OS X so that user can't execute files inside /Users/?

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• How to select a user and remove all groups they are a member of using Powershell (with Quest)?

  - by Don

  I've read quite a bit online about this and thought I had found a solution, but it doesn't seem to be working like I would expect. I am wanting to get a user based on the username I input, then remove all groups that it is a member of. Basically the same thing as going into ADUC, selecting the user, selecting the Member Of tab, highlighting everything (except domain users of course) and selecting remove. Here's the command I'm trying to use: Get-QADUser -Name $username | Remove-QADMemberOf -RemoveAll Others have said online that it works for them, but so far it hasn't for me. It doesn't give an error, it accepts the command just fine, but when I look in ADUC, the groups are still there for the user. Any suggestions as to what I may be doing wrong? Executing from Windows 7 with domain admin rights, Exchange cmdlets and Quest snapin loaded. Thanks!

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• How to reduce memory consumption an AWS EC2 t1.micro instance (free tier) ubuntu server 14.04 LTS EBS

  - by CMPSoares

  Hi I'm working on my bachelor thesis and for that I need to host a node.js web application on AWS, in order to avoid costs I'm using a t1.micro instance with 30GB disk space (from what I know it's the maximum I get in the free tier) which is barely used. But instead I have problems with memory consumption, it's using all of it. I tried the approach of creating a virtual swap area as mentioned at Why don't EC2 ubuntu images have swap? with these commands: sudo dd if=/dev/zero of=/var/swapfile bs=1M count=2048 && sudo chmod 600 /var/swapfile && sudo mkswap /var/swapfile && echo /var/swapfile none swap defaults 0 0 | sudo tee -a /etc/fstab && sudo swapon -a But this swap area isn't used somehow. Is something missing in this approach or is there another process of reducing the memory consumption in these type of AWS instances? Bottom-line: This originates server freezes and crashes and that's what I want to stop either by using the swap, reducing memory usage or both.

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• Not able to install LTT tool in 10.04

  - by Ashoka

  I have tried the below commands to install LTT on VMware running Ubuntu 10.04, but got the following error. Please help. From link : https://launchpad.net/~lttng/+archive/ppa $ sudo apt-add-repository ppa:lttng/ppa $ sudo apt-get update $ sudo apt-get install lttng-tools lttng-modules-dkms babeltrace user@usr:~$ sudo apt-add-repository ppa:lttng/ppa Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /etc/apt/secring.gpg --trustdb-name /etc/apt/trustdb.gpg --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --keyserver keyserver.ubuntu.com --recv C541B13BD43FA44A287E4161F4A7DFFC33739778 gpg: requesting key 33739778 from hkp server keyserver.ubuntu.com gpg: unable to execute program `/usr/local/libexec/gnupg/gpgkeys_curl': No such file or directory gpg: no handler for keyserver scheme `hkp' gpg: keyserver receive failed: keyserver error user@usr:~$ user@usr:~$ sudo apt-get update ..... $ user@usr:~$ sudo apt-get install lttng-tools lttng-modules-dkms babeltrace Reading package lists... Done Building dependency tree Reading state information... Done E: Couldn't find package lttng-tools user@usr:~$ My systemm details: user@usr:~$ cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=10.04 DISTRIB_CODENAME=lucid DISTRIB_DESCRIPTION="Ubuntu 10.04.4 LTS" user@usr:~$ user@usr:~$ user@usr:~$ uname -a Linux usr 2.6.32-42-generic #95-Ubuntu SMP Wed Jul 25 15:57:54 UTC 2012 i686 GNU/Linux user@usr:~$ Regards, Ashoka

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• How can I authenticate Ubuntu Software Center with user password?

  - by user71852

  I would like to be able to use the password associated with this account to install packages with the GUI. Ideally, I would change the settings so that any user with sudo permissions could install packages. If that is not possible, I would like to be able to list all users that should be able to install. I know that this involves making changes to Policy Kit, and I have read a page with a similar question. However, I must need information specific to my own problem, because all my attempts so far have failed.

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• A c++ program that computes the min and max of f(x) for a rectangle inputed by user

  - by StreetBallerX

  So bassicly this is the problem quoted from my teacher : "You have to write a program in C++ that computes the minimal and the maximal value of function f(x,y) obtained on an integer point in a given rectangle [a, b] x [c, d]. Your program should prompt the user to input numerical values of a, b, c and d, as floating point numbers, which are expected to be in a range from -100 thru 100. In case when minimal or maximal values do not exists, your program should output appropriate messages. f(x,y)=x+x*x+x*x*x+y+y*y " So before anyone tell me that i should try do it myself , i'll tell them that ive been trying to do it myself for the past 8 days but my deadline is aproaching and i just cant figure it out its a really simple program but i just cant understand it ... I wont post my attempts because all i saw in these forums is that when someone posts their try and a milion people start to say dont look it this way thry this and bla bla and the guy who posted it was just wondering for minor thing ... so what ever thank you all in advance and thats it :)

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• What do you do when a user asks for a feature you will not implement?

  - by ifvc

  What do you do when a user asks for a complex feature that you could implement, but you aren't going to do it because 1) it adds unnecessary complexity to other users 2) you are not going to do it as an option either because you don't want your settings panel to be complicated. I wrote an iOS app and there are a few users that asked me for some complex features that I can't do because of the reasons above. Most of the times I just answered them that "We will take that into consideration." Explaining them that they are in the minority that wants this feature is not going to help either. So, what do you do in the case like this?

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• mirror sql server 2008 to AWS instance from our datacenter?

  - by Alex

  We are currenlty running on hosted pos system locally and would like to mirror to AWS. We are new to AWS and would like to know the most cost effective way to do this? We have 2 DB and 2 web servers right now in one cabinet in CA. One tape drive, one firewall, one SNA. We are thinking to replicate our system in AWS (using sql server 2008) and just mirror both systems and use a witness server between them to keep the data in sync? The goal is, if CA datacenter goes down, AWS keeps running. User see no downtime. All data is synced. Is anyone doing something similar? Would this be practical to just use AWS in this fashion? Thanks

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• How can I show contextual ads after a user filtered page contents by keyword?

  - by lex82

  I am building a social bookmarking service that is monetized in part by Google Adsense. However, I don't know how to influence how the ads are displayed. I think Google scans my pages and decides itself which ads to show where. Navigation on my site is mainly based on the selection of categories or tags being provided by the users. So after a user filters a list of bookmarks by the tag "SEO", I think I know pretty well what he is looking for. So I am looking for a service that allows me to show contextual ads for these particular keywords. How I can guide Google to show relevant ads? Can you recommend an alternative ad network, that gives me more control?

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• Joomla: How can I prevent certain user from visiting a certain page?

  - by user6657

  I have an internal section in my Joomla only for "Registered" users. There they can edit preferences. Multiple users can access the same preferences (different stakeholders). Now I have "smithcorp" and "smithcorp_guest". They should both be able to view the same things, but "smithcorp_guest" shouldn't be able to edit the preferences. Is there a way to forbid "smithcorp_guest" access to this page? I have only seen access regulation via the user level, i.e. unregistered, registered, admin.

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• How to hide assets from user? ( e.g.: a png file )

  - by burninggramma

  I think the title is quite self-explaining, still this is a big area I think, so let me drop a few words: I've got a simple experiment game project going, and I want to make sure, that the user isn't messing with the game assets like player skin etc. In my opinion the best way would be that on production I would merge all the assets into one file and the application would check the hash of that file, so it could detect the corrupted data. Is this an acceptable practice? There must be sum libraries / applications which are targeting this problem, could you guide me on this? Project details: unix/linux, c++, sdl

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• How to make a model instance read-only after saving it once?

  - by Ryszard Szopa

  One of the functionalities in a Django project I am writing is sending a newsletter. I have a model, Newsletter and a function, send_newsletter, which I have registered to listen to Newsletter's post_save signal. When the newsletter object is saved via the admin interface, send_newsletter checks if created is True, and if yes it actually sends the mail. However, it doesn't make much sense to edit a newsletter that has already been sent, for the obvious reasons. Is there a way of making the Newsletter object read-only once it has been saved? Edit: I know I can override the save method of the object to raise an error or do nothin if the object existed. However, I don't see the point of doing that. As for the former, I don't know where to catch that error and how to communicate the user the fact that the object wasn't saved. As for the latter, giving the user false feedback (the admin interface saying that the save succeded) doesn't seem like a Good Thing. What I really want is allow the user to use the Admin interface to write the newsletter and send it, and then browse the newsletters that have already been sent. I would like the admin interface to show the data for sent newsletters in an non-editable input box, without the "Save" button. Alternatively I would like the "Save" button to be inactive.

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• Rails controller method going to plural form

  - by Jty.tan

  I'm new to rails! Ok, I am trying to set up a user signup form. It is mapped as a singular resource in the routes map.resource :user And trying to create the user through the console works fine. the controller code for user's signup is as follows: def signup @user = User.new#(params[:user]) end def create @user = User.new(params[:user]) #debugger if request.post? if @user.save session[:user] = User.authenticate(@user.login, @user.password) flash[:message] = "Signup successful" redirect_to registries_path else flash[:warning] = "Signup unsuccessful" #redirect_to 'user/signup' end end end The signup view is as follows (and this is where i think something is going wrong) <% form_tag user_path do %> <p>User creation.</p> <p><%= error_messages_for 'user' %></p> <p> <label>Username:</label> <%= text_field_tag 'login', nil, :size => 20, :maxlength => 20 %> </p> <p> <label>Password:</label> <%= password_field_tag 'password', nil, :size => 20, :maxlength => 20 %> </p> <p> <label>Password confirmation:</label> <%= password_field_tag 'password_confirmation', nil, :size => 20, :maxlength => 20 %> </p> <p> <label>Email:</label> <%= text_field_tag 'email' %> </p> <p><%= submit_tag 'Signup' %></p> <% end %> Now, that page renders just fine. I've called the form on the "user_path" which is singular (i think?). But when I hit the submit button, it gives me an error saying that uninitialized constant UsersController the occurence of the error makes sense, since User is meant to be singular, so if it is trying to call the Users controller, it should be chucking an error. When I checked the server log, it shows this message: Processing ApplicationController#create (for 127.0.0.1 at 2010-05-08 16:26:14) [POST] Parameters: {"commit"=>"Signup", "password_confirmation"=>"[FILTERED]", "action"=>"create", "authenticity_token"=>"yOcHY+rMjaqmu9HS8EwnDqJKbc0Zxictc0y4dtD26ac=", "controller"=>"users", "login"=>"bob", "password"=>"[FILTERED]", "email"=>"[email protected]"} NameError (uninitialized constant UsersController): In the params, I can see that it is calling the "users" controller. But I'm not sure how to fix that, or what is causing it to call the "users" controller as opposed to the "user" controller. Any ideas? Thanks in advance!

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• SOAP and NHibernate Session in C#

  - by Anonymous Coward

  In a set of SOAP web services the user is authenticated with custom SOAP header (username/password). Each time the user call a WS the following Auth method is called to authenticate and retrieve User object from NHibernate session: [...] public Services : Base { private User user; [...] public string myWS(string username, string password) { if( Auth(username, password) ) { [...] } } } public Base : WebService { protected static ISessionFactory sesFactory; protected static ISession session; static Base { Configuration conf = new Configuration(); [...] sesFactory = conf.BuildSessionFactory(); } private bool Auth(...) { session = sesFactory.OpenSession(); MembershipUser user = null; if (UserCredentials != null && Membership.ValidateUser(username, password)) { luser = Membership.GetUser(username); } ... try { user = (User)session.Get(typeof(User), luser.ProviderUserKey.ToString()); } catch { user = null; throw new [...] } return user != null; } } When the WS work is done the session is cleaned up nicely and everything works: the WSs create, modify and change objects and Nhibernate save them in the DB. The problems come when an user (same username/password) calls the same WS at same time from different clients (machines). The state of the saved objects are inconsistent. How do I manage the session correctly to avoid this? I searched and the documentation about Session management in NHibernate is really vast. Should I Lock over user object? Should I set up a "session share" management between WS calls from same user? Should I use Transaction in some savvy way? Thanks Update1 Yes, mSession is 'session'. Update2 Even with a non-static session object the data saved in the DB are inconsistent. The pattern I use to insert/save object is the following: var return_value = [...]; try { using(ITransaction tx = session.Transaction) { tx.Begin(); MyType obj = new MyType(); user.field = user.field - obj.field; // The fields names are i.e. but this is actually what happens. session.Save(user); session.Save(obj); tx.Commit(); return_value = obj.another_field; } } catch ([...]) { // Handling exceptions... } finally { // Clean up session.Flush(); session.Close(); } return return_value; All new objects (MyType) are correctly saved but the user.field status is not as I would expect. Even obj.another_field is correct (the field is an ID with generated=on-save policy). It is like 'user.field = user.field - obj.field;' is executed more times then necessary.

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• rails named_scope ignores eager loading

  - by Craig

  Two models (Rails 2.3.8): User; username & disabled properties; User has_one :profile Profile; full_name & hidden properties I am trying to create a named_scope that eliminate the disabled=1 and hidden=1 User-Profiles. The User model is usually used in conjunction with the Profile model, so I attempt to eager-load the Profile model (:include = :profile). I created a named_scope on the User model called 'visible': named_scope :visible, { :joins => "INNER JOIN profiles ON users.id=profiles.user_id", :conditions => ["users.disabled = ? AND profiles.hidden = ?", false, false] } I've noticed that when I use the named_scope in a query, the eager-loading instruction is ignored. Variation 1 - User model only: # UserController @users = User.find(:all) # User's Index view <% for user in @users %> <p><%= user.username %></p> <% end %> # generates a single query: SELECT * FROM `users` Variation 2 - use Profile model in view; lazy load Profile model # UserController @users = User.find(:all) # User's Index view <% for user in @users %> <p><%= user.username %></p> <p><%= user.profile.full_name %></p> <% end %> # generates multiple queries: SELECT * FROM `profiles` WHERE (`profiles`.user_id = 1) ORDER BY full_name ASC LIMIT 1 SHOW FIELDS FROM `profiles` SELECT * FROM `profiles` WHERE (`profiles`.user_id = 2) ORDER BY full_name ASC LIMIT 1 SELECT * FROM `profiles` WHERE (`profiles`.user_id = 3) ORDER BY full_name ASC LIMIT 1 SELECT * FROM `profiles` WHERE (`profiles`.user_id = 4) ORDER BY full_name ASC LIMIT 1 SELECT * FROM `profiles` WHERE (`profiles`.user_id = 5) ORDER BY full_name ASC LIMIT 1 SELECT * FROM `profiles` WHERE (`profiles`.user_id = 6) ORDER BY full_name ASC LIMIT 1 Variation 3 - eager load Profile model # UserController @users = User.find(:all, :include => :profile) #view; no changes # two queries SELECT * FROM `users` SELECT `profiles`.* FROM `profiles` WHERE (`profiles`.user_id IN (1,2,3,4,5,6)) Variation 4 - use name_scope, including eager-loading instruction #UserConroller @users = User.visible(:include => :profile) #view; no changes # generates multiple queries SELECT `users`.* FROM `users` INNER JOIN profiles ON users.id=profiles.user_id WHERE (users.disabled = 0 AND profiles.hidden = 0) SELECT * FROM `profiles` WHERE (`profiles`.user_id = 1) ORDER BY full_name ASC LIMIT 1 SELECT * FROM `profiles` WHERE (`profiles`.user_id = 2) ORDER BY full_name ASC LIMIT 1 SELECT * FROM `profiles` WHERE (`profiles`.user_id = 3) ORDER BY full_name ASC LIMIT 1 SELECT * FROM `profiles` WHERE (`profiles`.user_id = 4) ORDER BY full_name ASC LIMIT 1 Variation 4 does return the correct number of records, but also appears to be ignoring the eager-loading instruction. Is this an issue with cross-model named scopes? Perhaps I'm not using it correctly. Is this sort of situation handled better by Rails 3?

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• Mounting a TrueCrypt volume over FTP

  - by Maxim Zaslavsky

  Is it possible to mount a TrueCrypt volume file over FTP? Here's how TrueCrypt works with a local file: User inputs path to volume file, enters password TrueCrypt verifies that the password is correct (probably by decrypting the very first part of the volume file?) TrueCrypt reads the directory listing from the volume file and mounts the volume. However, in this step, TrueCrypt does NOT process the whole volume file. The user browses the directory listing and opens a file. TrueCrypt reads only the part of the volume file that contains the file the user wants, and then decrypts it. Once again, TrueCrypt doesn't process the whole volume file - it only reads part of it. The user edits part of the file and saves it. TrueCrypt encrypts the change and edits the volume file. I'm pretty sure it should be possible to mount a volume over FTP, without undermining security and without having to transfer the whole volume file just to read one small part of the volume. Here's how I imagine it: User inputs FTP path to volume file, enters FTP login information, enters password to volume TrueCrypt downloads the very first part of the volume file and verifies that the password is correct TrueCrypt downloads the part of the volume file that contains the directory listing - the data is sent encrypted over FTP and is decrypted locally. The user browses the directory listing and opens a file. TrueCrypt downloads only the part of the volume file that contains the file the user wants, and then decrypts it locally. The user edits part of the file and saves it. TrueCrypt encrypts the change and edits the volume file over FTP, transferring encrypted data only. Is such a feature available?

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• How to clone MySQL DB? Errors with CREATE VIEW/SHOW VIEW privileges

  - by user38071

  Running MySQL 5.0.32 on Debian 4.0 (Etch). I'm trying to clone a WordPress MySQL database completely (structure and data) on the same server. I tried doing a dump to a .sql file and an import into a new empty database from the command line, but the import fails with errors saying the user does not have the "SHOW VIEW" or "CREATE VIEW" privilege. Trying it with PHPMyAdmin doesn't work either. I also tried doing this with the MySQL root user (not named "root" though) and it shows an "Access Denied" error. I'm terribly confused as to where the problem is. Any pointers on cloning a MySQL DB and granting all privileges to a user account would be great (specifically for MySQL 5.0.32). The SHOW GRANTS command for the existing user works (the one who has privileges over the source database). It shows that the user has all privileges granted. I created a new user and database. Here's what I see with the grant commands. $ mysql -A -umyrootaccount --password=myrootaccountpassword mysql> grant all privileges on `newtarget_db`.* to 'newtestuser'@'localhost'; ERROR 1044 (42000): Access denied for user 'myrootaccount'@'localhost' to database 'newtarget_db' mysql> grant all privileges on `newtarget_db`.* to 'existingsourcedbuser'@'localhost'; ERROR 1044 (42000): Access denied for user 'myrootaccount'@'localhost' to database 'newtarget_db'

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• Cloning a git repository from a machine running OS X

  - by Mike

  Hi folks, I'm trying to host a git repository from my home OS X machine, and I'm stuck on the last step of cloning the repository from a remote system. Here's what I've done so far: On the OS X (10.6.6) machine (heretofore dubbed the "server") I created a new admin user Logged into the new user's account Installed git Created an empty git repository via "git init" Turned on remote login Set port mapping on my router (airport extreme) to send ssh traffic to the server Added a ".ssh" directory to the user's home directory From the remote machine (also an OS X 10.6.6 machine), I sent that machine's public key to the server using scp and the login credentials of the user created in step 1 To test that the server would use the remote machine's public key, I ssh'd to the server using the username of the user created in step 1 and indeed was able to connect successfully without being asked for a password I installed git on the remote machine From the remote machine I attempted to "git clone ssh://[email protected]:myrepo" (where "user", "my.server.address", and "myrepo" are all replaced by the actual username, server address and repo folder name, respectively) However, every time I try the command in step 11, I get asked to confirm the server's RSA fingerprint, then I'm asked for a password, but the password for the user I set up for that machine never works. Any advice on how to make this work would be greatly appreciated!

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• How to provide users with isolated drive letters in Windows 2008 R2 (Terminal Server) [migrated]

  - by Pierre

  I need to be able to host several RDP sessions on a Terminal Server, where users of group A see a drive X: mapped to a given folder of the server and another group B see the same drive letter X: mapped to another folder. For instance : User 1, Group A X: --> C:\data\A User 2, Group A X: --> C:\data\A User 3, Group B X: --> C:\data\B User 4, Group C X: --> C:\data\C Is this possible. If so, how do I configure the virtual drive mapping so that the user has nothing special to do; i.e. I want the letter X: to be available to Remote Apps launched by the user, or if the user logs in to the remote desktop. Can I somehow use subst to get this to work? I would like to avoid, if possible, mounting drive letters on local shares (i.e. I don't like the idea of having to go through \\localhost\data-A to reach the user's data).

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• Setting up a local AI server - easy with Solaris 11

  - by Stefan Hinker

  Many things are new in Solaris 11, Autoinstall is one of them.  If, like me, you've known Jumpstart for the last 2 centuries or so, you'll have to start from scratch.  Well, almost, as the concepts are similar, and it's not all that difficult.  Just new. I wanted to have an AI server that I could use for demo purposes, on the train if need be.  That answers the question of hardware requirements: portable.  But let's start at the beginning. First, you need an OS image, of course.  In the new world of Solaris 11, it is now called a repository.  The original can be downloaded from the Solaris 11 page at Oracle.   What you want is the "Oracle Solaris 11 11/11 Repository Image", which comes in two parts that can be combined using cat.  MD5 checksums for these (and all other downloads from that page) are available closer to the top of the page. With that, building the repository is quick and simple: # zfs create -o mountpoint=/export/repo rpool/ai/repo # zfs create rpool/ai/repo/s11 # mount -o ro -F hsfs /tmp/sol-11-1111-repo-full.iso /mnt # rsync -aP /mnt/repo /export/repo/s11 # umount /mnt # pkgrepo rebuild -s /export/repo/sol11/repo # zfs snapshot rpool/ai/repo/sol11@fcs # pkgrepo info -s /export/repo/sol11/repo PUBLISHER PACKAGES STATUS UPDATED solaris 4292 online 2012-03-12T20:47:15.378639Z That's all there's to it.  Let's make a snapshot, just to be on the safe side.  You never know when one will come in handy.  To use this repository, you could just add it as a file-based publisher: # pkg set-publisher -g file:///export/repo/sol11/repo solaris In case I'd want to access this repository through a (virtual) network, i'll now quickly activate the repository-service: # svccfg -s application/pkg/server \ setprop pkg/inst_root=/export/repo/sol11/repo # svccfg -s application/pkg/server setprop pkg/readonly=true # svcadm refresh application/pkg/server # svcadm enable application/pkg/server That's all you need - now point your browser to http://localhost/ to view your beautiful repository-server. Step 1 is done.  All of this, by the way, is nicely documented in the README file that's contained in the repository image. Of course, we already have updates to the original release.  You can find them in MOS in the Oracle Solaris 11 Support Repository Updates (SRU) Index.  You can simply add these to your existing repository or create separate repositories for each SRU.  The individual SRUs are self-sufficient and incremental - SRU4 includes all updates from SRU2 and SRU3.  With ZFS, you can also get both: A full repository with all updates and at the same time incremental ones up to each of the updates: # mount -o ro -F hsfs /tmp/sol-11-1111-sru4-05-incr-repo.iso /mnt # pkgrecv -s /mnt/repo -d /export/repo/sol11/repo '*' # umount /mnt # pkgrepo rebuild -s /export/repo/sol11/repo # zfs snapshot rpool/ai/repo/sol11@sru4 # zfs set snapdir=visible rpool/ai/repo/sol11 # svcadm restart svc:/application/pkg/server:default The normal repository is now updated to SRU4.  Thanks to the ZFS snapshots, there is also a valid repository of Solaris 11 11/11 without the update located at /export/repo/sol11/.zfs/snapshot/fcs . If you like, you can also create another repository service for each update, running on a separate port. But now lets continue with the AI server.  Just a little bit of reading in the dokumentation makes it clear that we will need to run a DHCP server for this.  Since I already have one active (for my SunRay installation) and since it's a good idea to have these kinds of services separate anyway, I decided to create this in a Zone.  So, let's create one first: # zfs create -o mountpoint=/export/install rpool/ai/install # zfs create -o mountpoint=/zones rpool/zones # zonecfg -z ai-server zonecfg:ai-server> create create: Using system default template 'SYSdefault' zonecfg:ai-server> set zonepath=/zones/ai-server zonecfg:ai-server> add dataset zonecfg:ai-server:dataset> set name=rpool/ai/install zonecfg:ai-server:dataset> set alias=install zonecfg:ai-server:dataset> end zonecfg:ai-server> commit zonecfg:ai-server> exit # zoneadm -z ai-server install # zoneadm -z ai-server boot ; zlogin -C ai-server Give it a hostname and IP address at first boot, and there's the Zone.  For a publisher for Solaris packages, it will be bound to the "System Publisher" from the Global Zone.  The /export/install filesystem, of course, is intended to be used by the AI server.  Let's configure it now: #zlogin ai-server root@ai-server:~# pkg install install/installadm root@ai-server:~# installadm create-service -n x86-fcs -a i386 \ -s pkg://solaris/install-image/[email protected],5.11-0.175.0.0.0.2.1482 \ -d /export/install/fcs -i 192.168.2.20 -c 3 With that, the core AI server is already done.  What happened here?  First, I installed the AI server software.  IPS makes that nice and easy.  If necessary, it'll also pull in the required DHCP-Server and anything else that might be missing.  Watch out for that DHCP server software.  In Solaris 11, there are two different versions.  There's the one you might know from Solaris 10 and earlier, and then there's a new one from ISC.  The latter is the one we need for AI.  The SMF service names of both are very similar.  The "old" one is "svc:/network/dhcp-server:default". The ISC-server comes with several SMF-services. We at least need "svc:/network/dhcp/server:ipv4".  The command "installadm create-service" creates the installation-service. It's called "x86-fcs", serves the "i386" architecture and gets its boot image from the repository of the system publisher, using version 5.11,5.11-0.175.0.0.0.2.1482, which is Solaris 11 11/11.  (The option "-a i386" in this example is optional, since the installserver itself runs on a x86 machine.) The boot-environment for clients is created in /export/install/fcs and the DHCP-server is configured for 3 IP-addresses starting at 192.168.2.20.  This configuration is stored in a very human readable form in /etc/inet/dhcpd4.conf.  An AI-service for SPARC systems could be created in the very same way, using "-a sparc" as the architecture option. Now we would be ready to register and install the first client.  It would be installed with the default "solaris-large-server" using the publisher "http://pkg.oracle.com/solaris/release" and would query it's configuration interactively at first boot.  This makes it very clear that an AI-server is really only a boot-server.  The true source of packets to install can be different.  Since I don't like these defaults for my demo setup, I did some extra config work for my clients. The configuration of a client is controlled by manifests and profiles.  The manifest controls which packets are installed and how the filesystems are layed out.  In that, it's very much like the old "rules.ok" file in Jumpstart.  Profiles contain additional configuration like root passwords, primary user account, IP addresses, keyboard layout etc.  Hence, profiles are very similar to the old sysid.cfg file. The easiest way to get your hands on a manifest is to ask the AI server we just created to give us it's default one.  Then modify that to our liking and give it back to the installserver to use: root@ai-server:~# mkdir -p /export/install/configs/manifests root@ai-server:~# cd /export/install/configs/manifests root@ai-server:~# installadm export -n x86-fcs -m orig_default \ -o orig_default.xml root@ai-server:~# cp orig_default.xml s11-fcs.small.local.xml root@ai-server:~# vi s11-fcs.small.local.xml root@ai-server:~# more s11-fcs.small.local.xml <!DOCTYPE auto_install SYSTEM "file:///usr/share/install/ai.dtd.1"> <auto_install> <ai_instance name="S11 Small fcs local"> <target> <logical> <zpool name="rpool" is_root="true"> <filesystem name="export" mountpoint="/export"/> <filesystem name="export/home"/> <be name="solaris"/> </zpool> </logical> </target> <software type="IPS"> <destination> <image> <!-- Specify locales to install --> <facet set="false">facet.locale.*</facet> <facet set="true">facet.locale.de</facet> <facet set="true">facet.locale.de_DE</facet> <facet set="true">facet.locale.en</facet> <facet set="true">facet.locale.en_US</facet> </image> </destination> <source> <publisher name="solaris"> <origin name="http://192.168.2.12/"/> </publisher> </source> <!-- By default the latest build available, in the specified IPS repository, is installed. If another build is required, the build number has to be appended to the 'entire' package in the following form: <name>pkg:/[email protected]#</name> --> <software_data action="install"> <name>pkg:/[email protected],5.11-0.175.0.0.0.2.0</name> <name>pkg:/group/system/solaris-small-server</name> </software_data> </software> </ai_instance> </auto_install> root@ai-server:~# installadm create-manifest -n x86-fcs -d \ -f ./s11-fcs.small.local.xml root@ai-server:~# installadm list -m -n x86-fcs Manifest Status Criteria -------- ------ -------- S11 Small fcs local Default None orig_default Inactive None The major points in this new manifest are: Install "solaris-small-server" Install a few locales less than the default.  I'm not that fluid in French or Japanese... Use my own package service as publisher, running on IP address 192.168.2.12 Install the initial release of Solaris 11:  pkg:/[email protected],5.11-0.175.0.0.0.2.0 Using a similar approach, I'll create a default profile interactively and use it as a template for a few customized building blocks, each defining a part of the overall system configuration.  The modular approach makes it easy to configure numerous clients later on: root@ai-server:~# mkdir -p /export/install/configs/profiles root@ai-server:~# cd /export/install/configs/profiles root@ai-server:~# sysconfig create-profile -o default.xml root@ai-server:~# cp default.xml general.xml; cp default.xml mars.xml root@ai-server:~# cp default.xml user.xml root@ai-server:~# vi general.xml mars.xml user.xml root@ai-server:~# more general.xml mars.xml user.xml :::::::::::::: general.xml :::::::::::::: <!DOCTYPE service_bundle SYSTEM "/usr/share/lib/xml/dtd/service_bundle.dtd.1"> <service_bundle type="profile" name="sysconfig"> <service version="1" type="service" name="system/timezone"> <instance enabled="true" name="default"> <property_group type="application" name="timezone"> <propval type="astring" name="localtime" value="Europe/Berlin"/> </property_group> </instance> </service> <service version="1" type="service" name="system/environment"> <instance enabled="true" name="init"> <property_group type="application" name="environment"> <propval type="astring" name="LANG" value="C"/> </property_group> </instance> </service> <service version="1" type="service" name="system/keymap"> <instance enabled="true" name="default"> <property_group type="system" name="keymap"> <propval type="astring" name="layout" value="US-English"/> </property_group> </instance> </service> <service version="1" type="service" name="system/console-login"> <instance enabled="true" name="default"> <property_group type="application" name="ttymon"> <propval type="astring" name="terminal_type" value="vt100"/> </property_group> </instance> </service> <service version="1" type="service" name="network/physical"> <instance enabled="true" name="default"> <property_group type="application" name="netcfg"> <propval type="astring" name="active_ncp" value="DefaultFixed"/> </property_group> </instance> </service> <service version="1" type="service" name="system/name-service/switch"> <property_group type="application" name="config"> <propval type="astring" name="default" value="files"/> <propval type="astring" name="host" value="files dns"/> <propval type="astring" name="printer" value="user files"/> </property_group> <instance enabled="true" name="default"/> </service> <service version="1" type="service" name="system/name-service/cache"> <instance enabled="true" name="default"/> </service> <service version="1" type="service" name="network/dns/client"> <property_group type="application" name="config"> <property type="net_address" name="nameserver"> <net_address_list> <value_node value="192.168.2.1"/> </net_address_list> </property> </property_group> <instance enabled="true" name="default"/> </service> </service_bundle> :::::::::::::: mars.xml :::::::::::::: <!DOCTYPE service_bundle SYSTEM "/usr/share/lib/xml/dtd/service_bundle.dtd.1"> <service_bundle type="profile" name="sysconfig"> <service version="1" type="service" name="network/install"> <instance enabled="true" name="default"> <property_group type="application" name="install_ipv4_interface"> <propval type="astring" name="address_type" value="static"/> <propval type="net_address_v4" name="static_address" value="192.168.2.100/24"/> <propval type="astring" name="name" value="net0/v4"/> <propval type="net_address_v4" name="default_route" value="192.168.2.1"/> </property_group> <property_group type="application" name="install_ipv6_interface"> <propval type="astring" name="stateful" value="yes"/> <propval type="astring" name="stateless" value="yes"/> <propval type="astring" name="address_type" value="addrconf"/> <propval type="astring" name="name" value="net0/v6"/> </property_group> </instance> </service> <service version="1" type="service" name="system/identity"> <instance enabled="true" name="node"> <property_group type="application" name="config"> <propval type="astring" name="nodename" value="mars"/> </property_group> </instance> </service> </service_bundle> :::::::::::::: user.xml :::::::::::::: <!DOCTYPE service_bundle SYSTEM "/usr/share/lib/xml/dtd/service_bundle.dtd.1"> <service_bundle type="profile" name="sysconfig"> <service version="1" type="service" name="system/config-user"> <instance enabled="true" name="default"> <property_group type="application" name="root_account"> <propval type="astring" name="login" value="root"/> <propval type="astring" name="password" value="noIWillNotTellYouMyPasswordNotEvenEncrypted"/> <propval type="astring" name="type" value="role"/> </property_group> <property_group type="application" name="user_account"> <propval type="astring" name="login" value="stefan"/> <propval type="astring" name="password" value="noIWillNotTellYouMyPasswordNotEvenEncrypted"/> <propval type="astring" name="type" value="normal"/> <propval type="astring" name="description" value="Stefan Hinker"/> <propval type="count" name="uid" value="12345"/> <propval type="count" name="gid" value="10"/> <propval type="astring" name="shell" value="/usr/bin/bash"/> <propval type="astring" name="roles" value="root"/> <propval type="astring" name="profiles" value="System Administrator"/> <propval type="astring" name="sudoers" value="ALL=(ALL) ALL"/> </property_group> </instance> </service> </service_bundle> root@ai-server:~# installadm create-profile -n x86-fcs -f general.xml root@ai-server:~# installadm create-profile -n x86-fcs -f user.xml root@ai-server:~# installadm create-profile -n x86-fcs -f mars.xml \ -c ipv4=192.168.2.100 root@ai-server:~# installadm list -p Service Name Profile ------------ ------- x86-fcs general.xml mars.xml user.xml root@ai-server:~# installadm list -n x86-fcs -p Profile Criteria ------- -------- general.xml None mars.xml ipv4 = 192.168.2.100 user.xml None Here's the idea behind these files: "general.xml" contains settings valid for all my clients.  Stuff like DNS servers, for example, which in my case will always be the same. "user.xml" only contains user definitions.  That is, a root password and a primary user.Both of these profiles will be valid for all clients (for now). "mars.xml" defines network settings for an individual client.  This profile is associated with an IP-Address.  For this to work, I'll have to tweak the DHCP-settings in the next step: root@ai-server:~# installadm create-client -e 08:00:27:AA:3D:B1 -n x86-fcs root@ai-server:~# vi /etc/inet/dhcpd4.conf root@ai-server:~# tail -5 /etc/inet/dhcpd4.conf host 080027AA3DB1 { hardware ethernet 08:00:27:AA:3D:B1; fixed-address 192.168.2.100; filename "01080027AA3DB1"; } This completes the client preparations.  I manually added the IP-Address for mars to /etc/inet/dhcpd4.conf.  This is needed for the "mars.xml" profile.  Disabling arbitrary DHCP-replies will shut up this DHCP server, making my life in a shared environment a lot more peaceful ;-)Now, I of course want this installation to be completely hands-off.  For this to work, I'll need to modify the grub boot menu for this client slightly.  You can find it in /etc/netboot.  "installadm create-client" will create a new boot menu for every client, identified by the client's MAC address.  The template for this can be found in a subdirectory with the name of the install service, /etc/netboot/x86-fcs in our case.  If you don't want to change this manually for every client, modify that template to your liking instead. root@ai-server:~# cd /etc/netboot root@ai-server:~# cp menu.lst.01080027AA3DB1 menu.lst.01080027AA3DB1.org root@ai-server:~# vi menu.lst.01080027AA3DB1 root@ai-server:~# diff menu.lst.01080027AA3DB1 menu.lst.01080027AA3DB1.org 1,2c1,2 < default=1 < timeout=10 --- > default=0 > timeout=30 root@ai-server:~# more menu.lst.01080027AA3DB1 default=1 timeout=10 min_mem64=0 title Oracle Solaris 11 11/11 Text Installer and command line kernel$ /x86-fcs/platform/i86pc/kernel/$ISADIR/unix -B install_media=htt p://$serverIP:5555//export/install/fcs,install_service=x86-fcs,install_svc_addre ss=$serverIP:5555 module$ /x86-fcs/platform/i86pc/$ISADIR/boot_archive title Oracle Solaris 11 11/11 Automated Install kernel$ /x86-fcs/platform/i86pc/kernel/$ISADIR/unix -B install=true,inst all_media=http://$serverIP:5555//export/install/fcs,install_service=x86-fcs,inst all_svc_address=$serverIP:5555,livemode=text module$ /x86-fcs/platform/i86pc/$ISADIR/boot_archive Now just boot the client off the network using PXE-boot.  For my demo purposes, that's a client from VirtualBox, of course.  That's all there's to it.  And despite the fact that this blog entry is a little longer - that wasn't that hard now, was it?

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• generic DAO in java

  - by akshay

  I am trying to develop generic DAO in java.I have tried the following.Is this a good way to implement generic dao?I dont want to use hibernate.I am trying to make it as generic as possible so that i dont have to repeate the same code again and again. public abstract class AbstractDAO<T> { protected ResultSet findbyId(String tablename, Integer id){ ResultSet rs= null; try { // the following lins in not working; pStmt = cn.prepareStatement("SELECT * FROM "+ tablename+ "WHERE id = ?"); pStmt.setInt(1, id); rs = pStmt.executeQuery(); } catch (SQLException ex) { System.out.println("ERROR in findbyid " +ex.getMessage() +ex.getCause()); ex.printStackTrace(); }finally{ return rs; } } } Now i have public class UserDAO extends AbstractDAO<User>{ public List<User> findbyid(int id){ Resultset rs =findbyid("USERS",id) //USERS is tablename in db List<Users> users = convertToList(rs); return users; } private List<User> convertToList(ResultSet rs) { List<User> userList= new ArrayList(); User user= new User();; try { while (rs.next()) { user.setId(rs.getInt("id")); user.setUsername(rs.getString("username")); user.setFname(rs.getString("fname")); user.setLname(rs.getString("lname")); user.setUsertype(rs.getInt("usertype")); user.setPasswd(rs.getString("passwd")); userList.add(user); } } catch (SQLException ex) { Logger.getLogger(UserDAO.class.getName()).log(Level.SEVERE, null, ex); } return userList; } }

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• Implementation review for a MVC.NET app with custom membership

  - by mrjoltcola

  I'd like to hear if anyone sees any problems with how I implemented the security in this Oracle based MVC.NET app, either security issues, concurrency issues or scalability issues. First, I implemented a CustomOracleMembershipProvider to handle the database interface to the membership store. I implemented a custom Principal named User which implements IPrincipal, and it has a hashtable of Roles. I also created a separate class named AuthCache which has a simple cache for User objects. Its purpose is simple to avoid return trips to the database, while decoupling the caching from either the web layer or the data layer. (So I can share the cache between MVC.NET, WCF, etc.) The MVC.NET stock MembershipService uses the CustomOracleMembershipProvider (configured in web.config), and both MembershipService and FormsService share access to the singleton AuthCache. My AccountController.LogOn() method: 1) Validates the user via the MembershipService.Validate() method, also loads the roles into the User.Roles container and then caches the User in AuthCache. 2) Signs the user into the Web context via FormsService.SignIn() which accesses the AuthCache (not the database) to get the User, sets HttpContext.Current.User to the cached User Principal. In global.asax.cs, Application_AuthenticateRequest() is implemented. It decrypts the FormsAuthenticationTicket, accesses the AuthCache by the ticket.Name (Username) and sets the Principal by setting Context.User = user from the AuthCache. So in short, all these classes share the AuthCache, and I have, for thread synchronization, a lock() in the cache store method. No lock in the read method. The custom membership provider doesn't know about the cache, the MembershipService doesn't know about any HttpContext (so could be used outside of a web app), and the FormsService doesn't use any custom methods besides accessing the AuthCache to set the Context.User for the initial login, so it isn't dependent on a specific membership provider. The main thing I see now is that the AuthCache will be sharing a User object if a user logs in from multiple sessions. So I may have to change the key from just UserId to something else (maybe using something in the FormsAuthenticationTicket for the key?).

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• Session Issue in rails?

  - by piemesons

  Suppose this is my users controller:- class UsersController < ApplicationController def show @user = session[:user] end def prepare session[:user]= User.find(:first) redirect_to :action => 'show' end def update @user = session[:user] @user.name = 'rai' redirect_to :action => 'show' end end View for show.html.erb <%= @user.name %> Show page <%= link_to 'Update', :action=> 'update' %> Now Explaining the issue:--- Suppose first time user opens the browser with http://localhost:3000/users/prepare o/p will be:--- Mohit Show page Update // supposing user table has values mohit as name Now when he click on update he will get as output like this:-- rai Show page Update But this should not happen cause firstly when are at prepare action where value is fecthced from db and its mohit. and then he is redirected to show ie displying the values from session. ie mohit Now when user click on the update he is redirected to update when value from session is stored to a user instance and the name attribute of that user instance has been modified to rai. and finally redirected to show page. Now in this page when user's name is displayed its showing rai.. thats the QUESTION why?? cause session should store the same mohit value cause we havnt made any change in session..

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• Spring-hibernate mapping problem

  - by James

  I have a spring-hibernate application which is failing to map an object properly: basically I have 2 domain objects, a Post and a User. The semantics are that every Post has 1 corresponding User. The Post domain object looks roughly as follows: class Post { private int pId; private String attribute; ... private User user; //getters and setters here } As you can see, Post contains a reference to User. When I load a Post object, I want to corresponding User object to be loaded (lazily - only when its needed). My mapping looks as follows: <class name="com...Post" table="post"> <id name="pId" column="PostId" /> <property name="attribute" column="Attribute" type="java.lang.String" /> <one-to-one name="User" fetch="join" class="com...User"></one-to-one> </class> And of course I have a basic mapping for User set up. As far as my table schema is concerned, I have a table called post with a foreign UserId which links to the user table. I thought this setup should work, BUT when I load a page that forces the lazy loading of the User object, I notice the following Hiberate query being generated: Select ... from post this_ left outer join user user2_ on this.PostId=user2_.UserId ... Obviously this is wrong: it should be joining UserId from post with UserId from user, but instead its incorrectly joining PostId from post (its primary key) with UserId from user. Any ideas? Thanks!

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