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  • Creating a ssh tunnel to transfer files?

    - by Vincent
    For me, networks are a very "opaque" thing, and even with reading a lot of tutorial about SSH, I do not understand how to create a basic tunnel to transfer my files. The configuration is the following : My Computer --[Internet]--> Bridge Machine --[Local Network]--> Final Machine Currently I do the following : 1) Connect to the Bridge Machine with : ssh -X [email protected] 2) Connect to the Final Machine with : ssh -X username@finalmachine 3) I copy the address of files I need (for example .../mydirectory) 4) Then I deconnect from the finalmachine with : exit 5) I copy the files to the bridge : scp -r username@finalmachine:/.../mydirectory . 6) I deconnect from the bridge with : exit 7) I copy the files to my machine : scp -r [email protected]:/.../mydirectory . Which is quite complicated. My question is basic : how to simplify this using a SSH tunnel ? (and please explain me the signification of each command line you write, to understand what each line really do and to avoid to use it like a magical thing. Furthermore if some ports number are used, explain me if I can pick a completely random number or if I have to choose a specific one.)

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  • As a programmer, should I know low and high-level programming languages?

    - by job
    I been contacted to do some work remote controlling LEDs displays over TCP/IP, but my experience and preparation is mostly about high-level programming language. I said that to the person who contact me about the work and he told me that: "if you call yourself a programmer you should know all these things" Should a programmer really know the details of low-level programming? Or can I treat it as a black box concept, as theoretical knowledge but not necessarily doing it or implementing low level language solutions, having in mind that low-level programming is not my expertise?

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  • Migrating a Windows Server to Ubuntu Server to provide Samba, AFP and Roaming Profiles

    - by Dan
    I'm replacing our old Windows XP Pro office server with a HP Microserver running Ubuntu Server 12.04 LTS. I'm not a Linux expert but I can find my way around a terminal prompt, I'm a Mac user by choice. The office use a mix of Windows XP Pro machines and OSX Lion laptops. I included Samba during installation, and I'm planning on using Netatalk for the AFP and Bonjour sharing. I'd quite like to have samba make the server appear in 'My network places' on the Windows machines the way Bonjour makes it appear in finder on the Macs, if this is possible? I want to get to a point so that a user logging into Windows, gets connected to the Ubuntu server (do they need an Ubuntu user account?) which get them their shares and their Windows user profile (though a standard profile across users would do). The upshot is to make centralised control of user accounts (e.g. If a person leaves, killing their account on the server stops their Windows logon and ability to access Samba shares) and to ensure files aren't stored on the individual machines for backup/security purposes. I want to make this as simple as possible, so don't want to have loads of stuff I don't need, I just can't figure out: What I need at the server end: - will Samba be enough (already installed as part of initial installation), or will I need to cock around with LDAP (and how does this interact with Samba) - For someone of moderate Linux competence like me, is there a package that offers easy admin of user accounts, e.g. a GUI like phpLDAPadmin (if LDAP is necessary) How to configure the XP machines: - do I need to have the XP machines set up as a domain controller (I've no idea, really) - roaming profiles looks to offer the feature of putting the user's files on the server rather than the machine itself along with a profile that follows the user from machine to machine. Syncing Mac user's home folders with the server This is less of a concern because I can set up Time Machine if it comes to it, but I'd appreciate any recommendations of what approach I should take having the Mac home folders synced to the server.

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  • Why (not) logic programming?

    - by Anto
    I have not yet heard about any uses of a logical programming language (such as Prolog) in the software industry, nor do I know of usage of it in hobby programming or open source projects. It (Prolog) is used as an academic language to some extent, though (why is it used in academia?). This makes me wonder, why should you use logic programming, and why not? Why is it not getting any detectable industry usage?

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  • Why are exceptions considered better than explicit error testing?

    - by Richard Keller
    I often come across heated blog posts where the author uses the argument of "exceptions vs explicit error checking" to advocate their preferred language over some other language. The general consensus seems to be that languages which make use of exceptions are inherently better / cleaner than languages which rely heavily on error checking through explicit function calls. Is the use of exceptions considered better programming practice than explicit error checking, and if so, why?

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  • wubi dual-boot installation of ubuntu 12.04 on Windows 7 fails to boot

    - by Andrew
    I am trying to use the wubi installation process to create a Ubuntu 12.04 / Windows 7 dual boot setup on my Windows 7 machine (Dell Inspiron 17R). The installation initially works fine, and I am able to load Ubuntu several times after selecting it from the boot menu. However, when I boot into Windows 7 it seems to corrupt the Ubuntu boot process, because after running Windows 7, Ubuntu won't boot on the machine. It is still listed as an option in the boot menu, but when it is selected, the machine does one of the following: -hangs at the load-screen and says that Ubuntu is preparing to run for the first time (although it isn't the first time the OS has been loaded) -hangs with a black screen and does nothing I have uninstalled Ubuntu and then reinstalled it (using wubi) three times. Each time Ubuntu initially boots okay (including rebooting the laptop into Ubuntu several times.) However, whenever I switch over and boot into Windows 7 it breaks the Ubuntu installation. Windows 7 continues to boot and work fine without issues. I have successfully installed Ubuntu using wubi onto a different Windows 7 machine before without problems...it seems that there is something different about this laptop configuration. I am not sure how to debug the issue. I see no error messages during the Ubuntu boot process when it hangs and am not sure how to debug this.

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  • How do I connect to MySQL when it's setting behind 2 layers of ssh?

    - by David Corley
    I have a MySQL server sitting behind a bastion server that I wish to connect to from my local machine. Ideally I want to port-forward the MySQL port (3316 in this case) to a local port on my machine. I've tried plink -ssh -L 3306:my.sql.ip.address:3316 my.bastion.server ,but this is not working. I've got one ssh login for the bastion server and another login for the machine mysql server is running on.

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  • ASP.NET MVC 2 Hosting :: MVC2 deploy - Could not load file or assembly 'System.Web.MVC, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies.

    - by mbridge
    A new MVC 2 project worked on my local machine but when it was deployed to the test server it gave the error 'Could not load file or assembly 'System.Web.Mvc, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies.' I have the full Visual Studio 2010 installed on my local machine but just the .NET 4 framework installed on the test servers. It seems the MVC assemblies do not come with .NET 4 framework itself so how to make MVC 2 work on the test servers? When I installed Visual Studio 2010 on my local machine it came with all the fruit included (.NET4 framework, MVC2 etc) so the System.Web.Mvc.dll can be found in my machine's GAC (C:\Windows\assembly). However, since there is no need to bloat the web servers only the plain old .NET4 framework has been installed on the test servers. This does NOT include the MVC assembly and that is why it cannot be found by the web application. You need this assembly to be on your web servers that you are deploying to but you want to avoid having to copy them into the GAC manually and doing all that gacutil mess or maybe you don't have access to your servers if they are hosted by provider. Solution You need to make the System.Web.Mvc assembly bin deployable... okay that doesn't sound easy but here is how to do it for the necessary MVC references: Simply right click the reference and select 'Properties' Then change 'Copy Local' to 'True': Note If your server has .NET 3.5 sp1 installed the new(ish) assemblies System.Web.Routing and System.Web.Abstractions will already be in the GAC. If you had previously deployed an MVC 1 application to a .NET 3.5 server you may remember having to deploy the other two assemblies too. Since MVC2 requires at least .NET 3.5 sp1 you will not need to worry about these assemblies, just System.Web.Mvc

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  • Connect to MS Sql 2008 on local VM

    - by Campo
    I have a test machine. Server 2008 with Hyper V MSSQL 2008 Enterprise Lets call it MACHINE A on the VM it is as well Server 2008 with another MSSQL 2008 Ent Call it VM B I setup a DB on MACHINE A then backed it up and restored following the prepare database for mirroring instructions on MSDN onto VM B. I used to be able to connect to the VM B Instance from the main test server (MACHINE A) but now I cannot for some reason. It cannot seem to find the instance at all even when I browse network databases. I can ping the VM from any computer on the network and access its shares so I know it is discoverable. Just the end of a long day maybe I am missing something here.

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  • Need help w/ rsync

    - by user71106
    I need some help getting my rync command syntax working. I need to clone the /home/user/public_html folder on a remote server to the server I am logged into via SSH, copying the folder into the same exact path on this local machine. I have root on the local machine I'm in session on and a user account shell on the remote machine. I'm not clear on where to put the SSH login info and how to define the folder paths.

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  • Free Developer Day - Hands-on Oracle 11g Applications Development

    - by [email protected]
    Spend a day with us learning the key tools, frameworks, techniques, and best practices for building database-backed applications. Gain hands-on experience developing database-backed applications with innovative and performance-enhancing methods. Meet, learn from, and network with Oracle database application development experts and your peers. Get a chance to win a Flip video camera and Oracle prizes, and enjoy post-event benefits such as advanced lab content downloads.Bring your own laptop (Windows, Linux, or Mac with minimum 2Gb RAM) and take away scripts, labs, and applications*.Space is limited. "Register Now"  for this FREE event. Don't miss your exclusive opportunity to meet with Oracle application development & database experts, win Oracle Trainings, and discuss today's most vital application development topics.          Win two Oracle Trainings valued in $2500 each. Offered by SDT Learning Corp·         Oracle Application Express: Developing Web Applications (duración de 4 días)·         Oracle Fusion Middleware 11g: Java Programming Ed 1.1 (duración de 5 días)You can also be registered Calling to Jamielle Gandía at 787-999-3187Requirements by TrackFor .Net Track1) A windows machine with 2 GB memory2) Attendees must in advance of the show, download and install VMWare player:       http://www.vmware.com/products/player/3) Attendees should test their machine to make sure they can run an executable on an external USB hard drive (some corporate machines are locked down so they cannot do this)For Java TrackYou will save time if you install these applications in advance:1) A windows machine with 2 GB memory2) VirtualBox must be installed in each laptopWhat is virtual box? Where can I download it?For APEX Track1) A windows machine with 2 GB memoryOracle Corporate agenda @  HereNote:  (Limited to 50 people per Track)

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  • What's the best Open Source code you've ever seen?

    - by Andrew Theken
    Part of the value of Open Source is to provide great example code to people getting started with a new platform or language. What's the best Open Source code you've encountered, and why do you like your choice? Any language will do, but I'm particularly interested in the best examples of Objective-C you can point out. Obviously this is an open-ended question, so I'll leave the question open for a while and see what kinds of answers we get. Thanks!

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  • find command in Linux

    - by Martin
    My goal is to find all pdf files on a remote machine, so I resort to the useful command find. So I type find ~ *.pdf or find ~ "*.pdf" and I get nothing. I do the same on my machine and I get nothing. I do a regular search from the menu on my machine and I find quite a few pdf files. Would somebody please tell me what am I doing wrong?

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  • Linux and Windows Server Setup

    - by Brian
    Hello, I have an win 2008 R2 machine (a home machine of mine) that I am messing around with and learning the server technologies. I also wanted to try out oracle, and was wondering if its possible to setup a LINUX machine with Oracle, and have the two interoperate. What I mean by that is if I setup the server and my laptop on a domain, would it be possible to communicate to that LINUX machine and thus the Oracle database, and if so, are there any good resources on the setup? I was going to create a LINUX hyper v virtual... Any tips appreciated. Thanks.

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  • SQL Azure Security: DoS

    - by Herve Roggero
    Since I decided to understand in more depth how SQL Azure works I started to dig into its performance characteristics. So I decided to write an application that allows me to put SQL Azure to the test and compare results with a local SQL Server database. One of the options I added is the ability to issue the same command on multiple threads to get certain performance metrics. That's when I stumbled on an interesting security feature of SQL Azure: its Denial of Service (DoS) detection engine. What this security feature does is that it performs a check on the number of connections being established, and if the rate of connection is too high, SQL Azure blocks all communication from that machine. I am still trying to learn more about this specific feature, but it appears that going to the SQL Azure portal and testing the connection from the portal "resets" the feature and you are allowed to connect again... until you reach the login threashold. In the specific test I was performing, all the logins were successful. I haven't tried to login with an invalid account or password... that will be for next time. On my Linked In group (SQL Server and SQL Azure Security: http://www.linkedin.com/groups?gid=2569994&trk=hb_side_g) Chip Andrews (www.sqlsecurity.com) pointed out that this feature in itself could present an internal threat. In theory, a rogue application could be issuing many login requests from a NATed network, which could potentially prevent any production system from connecting to SQL Azure within the same network. My initial response was that this could indeed be the case. However, while the TCP protocol contains the latest NATed IP address of a machine (which masks the origin of the machine making the SQL request), the TDS protocol itself contains the IP Address of the machine making the initial request; so technically there would be a way for SQL Azure to block only the internal IP address making the rogue requests.  So this warrants further investigation... stay tuned...

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  • Development on Windows 7; Web server on Linux - How to share Apache web root?

    - by TheKeys
    I've got a LAMP server that I want to use as a local web server. I've got a Windows 7 machine that I want to use as my development machine. The machines will be on the same LAN (or the Windows box will be VPNed into the LAN). My questions is, what is the best way of sharing the web root of the LAMP server so that I can edit the files on the remote Windows 7 machine and how do I go about configuring this on the Linux machine? (Fedora 16) I would like the solution to be as easy to use as possible with preferably no extra steps required to save/edit/upload files from my IDE on my Windows 7 machine. I'm thinking either a Samba or NFS share are the way to go but I'm concerned I'm going to run into issues with permissions and unix/windows file handling. Is one better than ther other for my use case or is there a better alternative solution? I'm currently using Windows 7 Professional which doesn't have NFS support but would upgrade to Ultimate which does have NFS support if it's the best solution.

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  • P2V using Acronis True Image Home 10 and Windows 7

    - by Anthony
    I have a full system image using Acronis True Image Home 10 and want to run it as a virtual machine on Windows 7 Professional. I have created a virtual machine but Windows Virtual PC doesn't allow access to a USB external hard disk when booting from the Acronis Recovery CD. I've copied the backup onto the host machine and I can access it via the network using the Acronis boot CD but I'm wondering if there is an easier way? Does any other free Virtual Machine software support USB devices during boot (i.e. I can restore a backup image from the USB hard disk directly)

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  • SharePoint 2010 Service Pack 1

    - by Ricardo Peres
    Install updates by this order: SharePoint Foundation 2010 SP1 SharePoint Foundation 2010 Language Packs SP1 SharePoint Server 2010 SP1 SharePoint Server 2010 SP1 Language Packs SP1 June 2011 Cumulative Update After installing any of these packages, run the SharePoint 2010 Products Configuration Wizard. Also, you may want to read this: Service Pack 1 (SP1) for Microsoft SharePoint Foundation 2010 and Microsoft SharePoint Server 2010 (white paper) Description of SharePoint Server 2010 SP1

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  • Is it possible to boot from a passthrough lsi2008 under esxi?

    - by Kurt
    I currently have Solaris 11 Express running on bare metal. I'd like to convert the machine to an ESXI host and run the existing os as a virtual machine. I have ESXI setup, the virtual machine made, if I boot the vm from the recovery disk the drives and lsi2008 controller is visible. Everything looks like it should work, but the vm bios does not seem to try and boot from the controller. Is this just impossible?

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  • printing parallel over ethernet cable

    - by Crudler
    I have a bit of an interesting challenge :) I have a machine with a parallel printer output, i want it to be able to print instead to a printer in a different room and i know that parallel isnt great over big distances. i found this: http://www.amazon.com/over-Cat5-Extension-Cable-Adapter/dp/B002WJ9S6Y%3FSubscriptionId%3DAKIAINHICTCYYZGJWT4Q%26tag%3Dusbprintercables.net-20%26linkCode%3Dxm2%26camp%3D2025%26creative%3D165953%26creativeASIN%3DB002WJ9S6Y which will let me connect over cat5, but its usb to cat 5. my machine can only output on parallel (its not a computer) so what i was thinking of getting is a parallel(f) to usb and usb to parallel (M) for either side i.e. machine - parallel - usb - cat5 - usb - parallel -printer just seems a bit messy :) suggestions? another thing i would like to try is to get rid of the old school parallel printer and instead use a network based multi function. would this be possible? i.e. machine - parallel -usb - cat5 - ethernet print server - network printer this might be rougher because the machine cannot "know" that we are using a network printer. it can ONLY print to LPT1 Thanks!

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  • What are the canonical problem sets or problem domains for the different types of languages?

    - by SnOrfus
    I'm just wondering what some of the canonical problem sets are for certain types of languages? ie. Fill in the blanks: __ is the perfect language to use for solving __. The question was arrived at reading or hearing people say statements like such and such module in our codebase would be much easier to implement using a functional language. Fee free to include examples that would seem obvious to you.

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  • serving a blog at domain.com/blog when dns for domain.com is pointing elsewhere

    - by user143715
    there is a blog hosted on one machine (apache) (currently at blog.domain.com) and we'd like to move it to domain.com/blog. dns for domain.com is pointed at an haproxy machine load balancing a few nginx app servers. the machine hosting the blog is not behind that load balancer. considering i have complete control over the configuration of everything, whats the most straightforward way to get this to submit to my will and have the blog served from domain.com/blog?

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  • Public static ip for vagrant box

    - by Numbata
    I have server (Debian Squeeze) with 1 ethernet card and 2 public static IPs (188.120.245.4 and 188.120.244.5). What I want: Setup virtual box (Ubuntu) with access via static IP (188.120.244.5). What I was trying: config.vm.forward_port - good idea: setup interface "eth1:1" with 188.120.244.5 on host-machine, and add to Vagrant file "config.vm.forward_port = hmm..?" config.vm.network :hostonly, "188.120.244.5" - not working. Was created new interface on host-machine with ip "188.120.244.1". Of course 188.120.244.1 IP isn't mine and I can't access my server via this IP. config.vm.network :bridged - I'm confused how this works :) What I have now: Not working configuration. Debian-host-machine# cat Vagrantfile Vagrant::Config.run do |config| config.vm.define :gitlab do |box_config| box_config.vm.box = "ubuntu" box_config.vm.host_name = "ubuntu" box_config.vm.network :bridged box_config.vm.network :hostonly, "188.120.244.5", :auto_config => false end end Debian-host-machine# ifconfig eth1 Link encap:Ethernet HWaddr 00:15:17:69:71:bb inet addr:188.120.245.4 Bcast:188.120.247.255 Mask:255.255.248.0 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 vboxnet0 Link encap:Ethernet HWaddr 0a:00:27:00:00:00 inet addr:188.120.244.1 Bcast:188.120.246.255 Mask:255.255.255.0 Ubuntu-virtual-machine# ifconfig eth0 Link encap:Ethernet HWaddr 08:00:27:ee:8d:0c inet addr:10.0.2.15 Bcast:10.0.2.255 Mask:255.255.255.0 eth1 Link encap:Ethernet HWaddr 08:00:27:45:71:87 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 How I can access virtual box via public static IP from network? I'm using Oracle VM VirtualBox Manager 4.1.18 and Vagrant version 1.0.3. Thanks in advance for your feedback.

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  • Windows 7 and XP Networking

    - by David-Zazeski
    I'm trying to setup a home network between a windows 7 and windows xp machine. I have a small hub. My XP computer has a manually assigned IP address (192.168.0.10) and I set my Windows 7 machine to have a manually assigned IP address (192.168.0.15). The XP computer works, but the Windows 7 machine does not see the network. It says that there is no connectivity. Ping does not work from either machine. Does anyone have any suggestions?

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