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• How can I tell which laptop touch-screens work well with a stylus (for drawing/taking notes)?

  - by BlueRaja

  I'm looking for a laptop with a touch-screen and stylus for drawing/note-taking. I've read the difference between the different kinds of styluses, but that's only half the story - what about the touch-screen? How do I know if the touch-screen supports "palm-rejection"? Or if the included stylus is a capacitive stylus or a "Wacom digitizer"? Or if the screen will even support Wacom? How can I tell how accurate the touch-screen is (from my testing, some definitely seem to have higher "resolution" than others)? Is there anything else I should be looking at? I don't see any of this information on, for instance, the Newegg specs page for a laptop.

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• Why am I getting [mount error(22): Invalid argument] while trying to mount SMB network drive?

  - by Steve_

  Disclaimer: I am very new to Linux :) Anyway, onward: I have a fresh instance of Ubuntu Server (12.04.1 LTS) running on my network and I want to mount a network drive to the server so I can access the contents. The network drive is a SAMBA compatible drive running Darwin OS. If I run the following command: smbclient -L //192.168.0.2 -U myuser It prompts me for the password and then displays output similar to: Domain=[SERVER01] OS=[Darwin] Server=[@(#)PROGRAM:smbd PROJECT:smbx-105.4.0] Sharename Type Comment --------- ---- ------- Comp Staff's Public Folder Disk CompRaid03 Disk Dropbox Disk Groups Disk IPC$ IPC Public Disk Users Disk compstaff Disk However, when I try and mount the CompRaid03 share, using this command: sudo mount -t cifs //192.168.0.2/CompRaid03 /mnt/myshare -o username=myuser I get the same password prompt, but after putting the correct password in, I received this error: mount error(22): Invalid argument dmesg | tail returns: [23576.037373] CIFS VFS: cifs_mount failed w/return code = -22 I don't understand what is wrong with this command. I've managed to mount a share on my current (Windows 8) machine using basically the same command but with a different IP address and share name (obviously). I've spent a good few hours trying to solve this and got no where. Any help or pointers would be greatly appreciated. Thanks Steve EDIT As suggested I've also trued using "user=" instead of "username=": sudo mount -t cifs //192.168.0.2/CompRaid03 /mnt/svnrepo -o user=myuser This results in the same "Invalid argument" error.

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• Activating ssl on tomcat

  - by toom

  I want to encrypt the http traffic on a tomcat instance via ssl. Therefore I followed the most simplistic approach described on various webpages. But anyway it simply does not work. Here is what I did: "keytool -genkey -alias tomcat -keyalg RSA" and I enterd "changeit" as the password (since this is the defaut chosen by tomcat) Altering $CATALINA_HOME/conf/servers.xml by uncommenting the following line Connector port="8443" protocol="HTTP/1.1" SSLEnabled="true" maxThreads="150" scheme="https" secure="true" clientAuth="false" sslProtocol="TLS"/ Restarting tomcat Entering https://localhost:8443 does not work. However, I can still access the page via normal http like http://localhost:8080 The logfile does not contain any suspicious information. What is going wrong here?

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• What causes Remote Desktop Services Manager to crash in Server 2008 R2?

  - by milkmood

  I have this consistent problem of RDSM crashing in Server 2008 R2. It is either really slow to open, sometimes never opens, or after it's been open and working properly for a bit, stops working, and forces an unload of the snap-in. It's done this since the deployment of this server, new hardware, new instance of S2k8. Domain Administrator login. I am using it to manage 3 Terminal Servers, the other two are S2k3. I've used it without issues on other 2008 servers.

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• what does the 'm' unit in munin mean?

  - by nbv4

  I'm using munin as a tool for monitoring my servers. On some of the graphs, the units are marked with a 'm'. For instance, my apache accesses graph is labeled 100m, 200m, 300m, along the y-axis. What does the 'm' mean? I understand 'M' (caps) is mega as in megabytes, the 'k' is kilo, the 'G' is giga, but what about 'm'? At first I thought it was million, but theres no way apache is serving 100 million accesses even per decade.

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• Can I use static routing to allow me to use my public IP from my LAN?

  - by jnm2

  I would like to be able to use the same hostname to connect to my computer from my phone whether I'm at home or away. Currently I have to maintain duplicate entries for remote desktop, for instance. My router doesn't seem to have a NAT loopback option. I have two routers in fact, a cable modem which goes straight to my main router which does wireless. I can add to the static routing tables on each. Can I use this to loopback the public IP or do I need different routers?

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• Load balanced proxies to avoid an API request limit

  - by ClickClickClick

  There is a certain API out there which limits the number of requests per day per IP. My plan is to create a bunch of EC2 instances with elastic IPs to sidestep the limitation. I'm familiar with EC2 and am just interested in the configuration of the proxies and a software load balancer. I think I want to run a simple TCP Proxy on each instance and a software load balancer on the machine I will be requesting from. Something that allows the following to return a response from a different IP (round robin, availability, doesn't really matter..) eg. curl http://www.bbc.co.uk -x http://myproxyloadbalancer:port Could anyone recommend a combination of software or even a link to an article that details a pleasing way to pull it off? (My client won't be curl but is proxy aware.. I'll be making the requests from a Ruby script..)

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• Unable to sunchronize local and remote directories ("set times: Operation not permitted")

  - by Tom Auger

  I'm running into FTP errors using software like NetBeans or WinSCP: whenever I attempt to perform a synchronization or update of files from local -- server I get errors on the client saying "set times: Operation not permitted". This is clearly an issue with the way I've configured my Fedora installation. The user that I'm logging in with cannot touch -t any of these files, though he IS part of a group that has r/w access on the files. I do have root / sudo access to this server. What I would like to know is: a) is it likely that this problem would be solved by allowing my FTP user to "touch -t" these files b) how do I enable a certain user to be able to set timestamps on files without giving them ownership of the files (certain of these files need to be owned by Apache, for instance, so I don't want to chown them). Thanks in advance.

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• share code between check and process methods

  - by undu

  My job is to refactor an old library for GIS vector data processing. The main class encapsulates a collection of building outlines, and offers different methods for checking data consistency. Those checking functions have an optional parameter that allows to perform some process. For instance: std::vector<Point> checkIntersections(int process_mode = 0); This method tests if some building outlines are intersecting, and return the intersection points. But if you pass a non null argument, the method will modify the outlines to remove the intersection. I think it's pretty bad (at call site, a reader not familiar with the code base will assume that a method called checkSomething only performs a check and doesn't modifiy data) and I want to change this. I also want to avoid code duplication as check and process methods are mostly similar. So I was thinking to something like this: // a private worker std::vector<Point> workerIntersections(int process_mode = 0) { // it's the equivalent of the current checkIntersections, it may perform // a process depending on process_mode } // public interfaces for check and process std::vector<Point> checkIntersections() /* const */ { workerIntersections(0); } std::vector<Point> processIntersections(int process_mode /*I have different process modes*/) { workerIntersections(process_mode); } But that forces me to break const correctness as workerIntersections is a non-const method. How can I separate check and process, avoiding code duplication and keeping const-correctness?

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• Fix X11 forwarding on OSX

  - by Such

  I am looking for a way to fix/debug a X11 forwarding session on OSX. Here is my situation: From my mac I connect to a Ubuntu workstation with ssh -X (tried ssh -Y as well). X11 forwarding works perfectly with firefox for instance, X11/Quartz is started automatically on OSX and firefox is displayed. X11 forwarding does not work with bat (Bacula graphical console): X11 is started but no window is displayed. There are no errors (/private/var/log/system.log). When I try doing the same from another Ubuntu workstation, it works perfectly for both firefox and bat. I guess the problem is on OSX side then. I tried switching some options in X11 but nothing works. Would you have any idea on how to move forward? Thanks!

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• Any need to make backup of data on Amazon S3?

  - by Chrille

  I'm hosting 200 GB of product images at S3 (this is my primary file host). Do I need to back that data up somewhere else, or is S3 safe as it is? I have been experimenting with mounting the S3 bucket to a EC2 instance, and then making a nightly rsync backup. The problem is that it's about 3 million files, so it takes a while to generate the different rsync needs. The backup actually takes about 3 days to complete. Any ideas how to do this better? (if it's even necessary?)

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• what poor management decsions have you had to deal with?

  - by tombull89

  As a junior technician I've had to deal with (or will have to deal with) some problems in the past and only being a junior technicain I don't have the confidence or respect from management staff to speak up. For instance, we're having a entirely new system. From Server 2003/XP going to Sevrer 2008 R2/Win7/VMWare/Digital Signage and the current amount of time dedicated to the training of the IT support department currently stands at 0. They seem to think that all it systems are the same and are going to get a bit of shock when I can't help them. I think there;s some UK legislation saying a school/business have to put money and time aside for training, but I'm not sure. What have you had to deal with?

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• apache port number

  - by user983223

  For each development sites I want to have a unique port number. For instance, domain.com:1234 This is what I have in my httpd.conf file. After restart the page domain.com:1234 is not showing in the browser. Is there anything else that I need to do besides what I have already done to make this work? Listen *:1234 <VirtualHost *:1234> DocumentRoot /var/www/dev_sites/test ServerName domain.com:1234 </VirtualHost> It looks like if I go to my local hostname (kk.local:1234) it shows. Is there some sort of dns that I need to do? I really don't want to go into godaddy everytime I add a development site. Is there a way around that?

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• How to install php cli with pnctl alongside Zend Server

  - by fazy

  I have Zend Server CE 5.6 with PHP 5.2 running on Ubuntu 11.10. Now the need has arisen to run a command line PHP script that uses PHP's pnctl functionality. First of all, I had no PHP command line in my path, so I made a symlink from the Zend one: sudo ln -s /usr/local/zend/bin/php /usr/bin However, when I run my script, I now get this error: PHP Fatal error: Call to undefined function pcntl_fork() The Zend web control panel doesn't offer pnctl in the list of modules, so how do I get this functionality? Is it safe to use apt-get to install PHP directly, to run alongside the Zend instance? If so, how do I make sure I get version 5.2? I guess the following would pull in PHP 5.3: apt-get php5-cli I could probably muddle through but any pointers to help me avoid making a mess would be much appreciated!

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• Business Process Management – What’s new in Oracle BPM 11.1.1.7.0 Webcast July 4th 2013

  - by JuergenKress

  Business-Driven. Complete. Best Practice. Business processes are at the heart of what makes or breaks a business—and what differentiates it from the competition. Business processes that deliver operational efficiency, business visibility, excellent customer experience, and agility give the enterprise an edge over the competition. Business managers need process management tools that enable them to make impactful changes. Oracle has been always a leader in this area and the new version of Oracle BPM 11g takes that even further by providing complete web based process modeling, simulation and implementation including designing the user interface and business logic. That provides business users with ability to take complete control over the business processes without sacrificing the vast service integration capabilities delivered traditionally by IT using SOA approach. Oracle Business Process Management is the industry's most complete and business user-friendly BPM solution. Register today for this webcast and find out more on the latest and most exciting new features which are now available in Oracle BPM Suite. Agenda Introduction do Oracle BPM 11g Exciting new features in this release Revamped Process Composer Simulations Web Forms Process Player Adaptive Case Management Instance Revisioning Other features Demonstration Q&A For details please visit the registration page. SOA & BPM Partner Community For regular information on Oracle SOA Suite become a member in the SOA & BPM Partner Community for registration please visit www.oracle.com/goto/emea/soa (OPN account required) If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Facebook Wiki Mix Forum Technorati Tags: BPM,Webcast,education,SOA Community,Oracle SOA,Oracle BPM,Community,OPN,Jürgen Kress

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• Issue with corrupt 1tb volume: can we rescue SQL databases?

  - by Barrie Ashmore

  We have an instance where some how a 1tb volume has become corrupted. There are Event ID 55 errors in the system event viewer. When running chkdsk, it gets to 47% verifying indexes and returns to the command prompt. If we are unable to rescue the data on the drive then we have a full backup of the databases from some time ago. The logfiles of which are on a different volume which is intact. Would it be viable to restore the databases and somehow replay the log files? I have seen articles about replaying logfiles from a logfile backup (.trn), however we have the actual logfiles (.ldf) Any help would be appreciated.

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• Upgrading Fedora on Amazon to 12 but getting libssl.so.* & libcrypto.so.* are missing

  - by bateman_ap

  I am upgrading to Fedora 12 on a Amazon EC2 using help here: http://www.ioncannon.net/system-administration/894/fedora-12-bootable-root-ebs-on-ec2/ I managed to do a 64 bit instance OK, however facing some problems with a standard one. On the final bit of the install from 11 to 12 I am getting an error: Error: Missing Dependency: libcrypto.so.8 is needed by package httpd-tools-2.2.1.5-1.fc11.1.i586 (installed) Error: Missing Dependency: libssl.so.8 is needed by package httpd-tools-2.2.1.5-1.fc11.1.i586 (installed) This is referenced in the comments from the link above but all it says is: Q: Apache failed, or libssl.so.* & libcrypto.so.* are missing A: These versions are mssing the symlinks they require. Easy fix, go symlink them to the newest versions in /lib However I am afraid I don't know how to do this. If it is any help I tried running the command locate libssl.so and got: /lib/libssl.so.0.9.8b /lib/libssl.so.6

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• Multi-site Drupal install with sites on different ports using Apache ip-based hosting?

  - by MattB

  In the past we've used name-based virtual hosting in Apache. We recently converted websites to SSL and had to go the ip-based route. As a result, we currently have an instance that is set up as follows: www.domain.com using port 80 dev.domain.com using port 8080 Both use the same IP. Is this scenario possible using Drupal multi-site functionality? While we find that dev.domain.com works and reads the correct "dev" database (using the dev settings), it reads theme files from the "www" site instead which is not what we want. Is the culprit the dev's htaccess file? Apache is listening on 8080 and does use the proper DB settings, but just not the correct theme files. One other note: browsing dev.domain.com:8080 gives an error: "The page isn't redirecting properly". Should we just purchase a new IP address for the dev website, or would this still not help? Any advice would be appreciated. Thanks.

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• What's the best way to work out if a virtual server is overloaded?

  - by zemaj

  I have a series of virtual servers. I'm running a command to login to each one and take a look at the load averages using uptime. What's the best way to work out if load values represent overloading? I'm running on rackspace cloud, so the servers have burst capability and can be all different sizes. I'm a little stumped on how to come up with a consistent way of figuring out when I need to spin up new servers. I can do things like estimate the jobs running on each one, but I'd like a system that runs a little closer to the real resource use available on each instance, as it obviously varies quite a bit! Help greatly appreciated!

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• Clicking on a link in Chrome opens up Notepad

  - by jonsca

  I'm currently using Chrome 21.0.1180.89 on Windows 7, but I have noticed this behavior in other versions before. Probably about one time in a hundred, I will click on a link on a website and an instance of Notepad will open up with a blank page rather than the browser going to the link. To my knowledge, I have no malware or viruses on the machine that could be causing this. It's a minor annoyance, so I'm not very concerned about it, but I'm wondering if there could be a MIME type that's set wrong by default in the browser?

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• Amazon EC2 IPSEC

  - by John Qualis

  I have configured a ubuntu 12.04 64-bit server machine on Amazon AWS to act as a strongswan IPSEC server. I want to connect to it from my MAC OSX Lion's inbuilt IPSEC client. The OSX machine is in my home network. I log into the AWS machine using a ssh to ubuntu@public-ip and I provide the private RSA key in form of .pem file which I downloaded when the machine instance was created. The ssh connection works file but the IPSEC connection fails. What credentials/configurations should I provide for an IPSEC connection from my OSX client to AWS ubuntu server? My OSX machine is behind an ISP provided modem/router. Appreciate any help and thanks in advance

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• In C++ Good reasons for NOT using symmetrical memory management (i.e. new and delete)

  - by Jim G

  I try to learn C++ and programming in general. Currently I am studying open source with help of UML. Learning is my hobby and great one too. My understanding of memory allocation in C++ is that it should be symmetrical. A class is responsible for its resources. If memory is allocated using new it should be returned using delete in the same class. It is like in a library you, the class, are responsibility for the books you have borrowed and you return them then you are done. This, in my mind, makes sense. It makes memory management more manageable so to speak. So far so good. The problem is that this is not how it works in the real world. In Qt for instance, you create QtObjects with new and then hand over the ownership of the object to Qt. In other words you create QtObjects and Qt destroys them for you. Thus unsymmetrical memory management. Obviously the people behind Qt must have a good reason for doing this. It must be beneficial in some kind of way, My questions is: What is the problem with Bjarne Stroustrups idea about a symmetrical memory management contained within a class? What do you gain by splitting new and delete so you create an object and destroy it in different classes like you do in Qt. Is it common to split new and delete and why in such case, in other projects not involving Qt? Thanks for any help shedding light on this mystery!

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• Is the capability to overwrite functions in JavaScript strength or weakness?

  - by S.N

  I recently came across the following code (from liferay.js) when I was working with Liferay: .... if (!Liferay._ajaxOld) { Liferay._ajaxOld = jQuery.ajax; } if (Liferay._ajaxOld) { jQuery.ajax = function(options) { if (Liferay.Util) { options.url = Liferay.Util.getURLWithSessionId(options.url); } return Liferay._ajaxOld(options); }; } .... As you can see, the code above overwrites the function "jQuery.ajax" to modify "options.url". One may say this is a strength of the language since we can easily overwrite and customize existing functions. However, I would imagine this capability can easily lead to a problem. For instance, my code can overwrite the same function "jQuery.ajax" to modify "options.url" differently from the code above. As a result, any code that expect the behavior defined by "liferay.js" may no longer function as expected. I see this as a weakness of the language as it does not provide proper encapsulation. What are the consensus about this feature/capability of the language in the field?

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• Block all third party domains from web pages

  - by wizlb

  When I'm browsing the web, I'd like to not be tracked by any third party services like Facebook or Google. For instance, if I visit somepage.com I don't want my browser requesting things from facebook.com unless I allow it. However, if I visit facebook.com, Facebook still works. Does anyone know of a Chrome or Firefox extension that will allow me to do this? AdBlock in Chrome doesn't seem to work because it just hides the web page elements, it doesn't stop the browser from downloading them. I imagine that some kind of proxy/browser extension hybrid would be the best. Any suggestions? Thank you.

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• Add custom command line to extended context menu in Windows 7

  - by 280Z28

  I have an application pinned to the task bar. 90% of the time, I run it with no additional command line options, so I can either click it (if not already open), or right click the icon and click the application name to open a new instance. I want to make it where when I right click it, there are 2 options listed: the first is the program with no command line options and the second is the one with a custom command line (that I hard code). If this is impossible, it would be tolerable to add it to the extended context menu (shift + right click the icon), but I prefer the former.

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