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• ubuntu server refusing connections via port forwarding

  - by Matt

  Getting some really weird behavior from our Ubuntu server... it's behind a Verizon router firewall with port forwarding (port 8080 to port 80 on the server), and we've been having issues accessing it via this external IP. From within the network, it appears to respond normally (I can access it via web browser and SSH), but refuses connections through port forwarding (using our static external IP). The strangest thing is that it actually responds to external port-forwarded connections right after being restarted, but quickly lapses back into this pattern of refusing external connections. I'm a bit of a server newbie (I'm actually a programmer in a small startup that just lost their server ops guy, urgh) so this is all trial by fire for me. Does anyone have any advice on what could be going wrong here? Any help would be appreciated, thanks.

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• Is GPU active when there are not any monitors?

  - by Mixer

  Does GPU render anything when there is no monitor plugged in? Today I turned my old PC into some kind of a "server" which means that I want it running 24/7. I don't need any display (I will operate through ssh) so when everything was set up I removed my monitor. After a hour I checked my graphic card's cooling system and it was still hot. My graphic card is GeForce 8600 (with DVI connector), OS is Debian Linux. What is the best solution in this situation (standalone server) if GPU is active and I don't want it to waste power?

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• Setting up linux server with multiple access rights

  - by Mark

  I am a graduate student and want to set up a linux server (preferably Ubuntu) in my office. I also want to give my friends SSH access to that box. My question is can I set up my server such that I can give one of my friends rights to install software on my machine but he cannot brows around outside the directory he is allowed to? Can I set up multiple apache instances (on different ports) for different people? so each has access to their own apache instance?

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• Where to run Java and PHP code continuously

  - by az1112

  I'm sorry if this is the wrong forum for a question like this, but you have to start asking questions somewhere to get anywhere :) The question is pretty simple: I need a server where I can run Java and PHP scripts 24 hours a day, 7 days a week. I need to be able to access this server via SSH, and I need to be able to retrieve the data generated by scripts using SCP. Also, I need to be able to run 10-20 scripts simultaneously. What is the name of the thing I should be looking for? Is it a dedicated server? I'm confused for 2 reasons: 1) because there seem to be all kinds of servers out there; 2) because most companies advertising dedicated servers seem to be aiming them at people who want to host websites. But I don't want to host a website; I just want to run my code.

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• High system cpu load (%sys), system locks

  - by Mark

  For the last two weeks we are having intermittent severe spikes in system cpu usage (shown as %sys), which last for maybe half a minute, locking most processes, including ssh. I've been trying to figure this out, but atop doesn't show anything relevant (system usage for processes it shows is insignificant), spikes are intermittent and I could not reproduce the spike using any workload for the web application this webserver hosts. If you have any ideas on how to debug high %sys and (sometimes) %si CPU usage, please share them. System specs (don't know if any of this is relevant): Dedicated server, CentOS 6, core i7 950, consistent 4 to 8 GB RAM free at any time, hard drives are in RAID-1. Additional info: dmesg output doesn't change between spikes /var/log/messages doesn't change between spikes Here is cat /proc/vmstat Here is output of mpstat 1 during a typical spike Add 07.11.11: looks like simple reboot restored system state, and we might never know what caused the disturbance in first place.

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• How to maintain VPS server?

  - by clorz

  Assuming I have no experience in running them, what would be called a good maintenance routine for a VPS server running mail server and LAMP with a couple of sites. I've got one for quite a while now, but was doing what I feel is right without any guidance. It's ubuntu server and the only thing I do is ssh in there once a month and apt-get update, apt-get upgrade. Last year it suggested to update the distro, which I did. Waded through a bunch of diffs, broke mail server in the process and fixed it later on. So it turned out fine. Was this a right thing to do or should I stick with the old version just updating the packages? Is there a difference in the routine if it will be Fedora?

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• How to combine with openvpn, dynamic-ip?

  - by asfasdv

  Dear everyone, I am currently using openvpn to surf online to bypass censorship. Let me show you the initial scenario: before openvpn is turned on: IP: 1.2.3.4 (hypothetical, checked by visiting whatismyip.com/) after openvpn is turned on IP: 10.2.3.4 (this is also checked with whatismyip.com/, I assume this is where the vpn's exit point's IP ) Situation: Once I enable openvpn, I can still ssh into this computer by sshing into 1.2.3.4, even though visiting whatismyip.com/ says it's 10.2.3.4. However, I am on dynamic IP, I run a website, and am using tools (inadyn in particular) which pings the freedns.afraid.org (my dns server) and updates my ip. The messed up part is when inadyn does so, my dns changes the ip to 10.2.3.4, which is presumably the exit point of my vpn. How do I get around this? (Note that sshing into 1.2.3.4 STILL works).

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• Finding the length of files and file path of directory structure in a Linux file system.

  - by Robert Nickens

  I have a problem on a Linux OS running a version of SMB where if the absolute path to a directory within a Shared Folder is greater than 1024 bytes and the filename component is greater than 256 bytes the SMB service crashes and locks out all other services for network access like, SSH and FTP rendering the machine mute. To keep the system for crashing I’ve temporarily moved a group of folders where I think the problem path may be located outside of Shared Folder. I need to find the file and file path that exceeded this limitation and rename them or remove them allowing me to return a bulk of the files to the Shared Folder. I’ve tried the find and grep commands without success. Is there a chain of commands or script that I can use to hunt down the offending files and directory? Please advise.

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• XDMCP is slow any ideas? (looking for alternative remote desktops)

  - by peteri

  I've been used to using RDP on Windows to remote to machines, and I've got an asus eee 701 which I want to use to do some *nix programming on. While the eee is a lovely little machine the screen and keyboard are a little small to use for lots of programming. I've tried using Xming (the free version) to remote login into the eee from my desktop using XDMCP (or even using a ssh session as a straight X11 server and no desktop on the eee) the whole thing seems seriously slow over wifi the initial desktop takes at least 5 seconds to paint (might even be 10 seconds I haven't actually timed it). So my real question is what do other folks use for remote control with a GUI for their *nix boxes? I am finding it hard to believe the performance is so bad over a wifi network (It makes the Mac IIs I used to use a college in 1988 seem fast) or is this just a problem with Xming and using say the Cygwin X11 server would be better.

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• What is the best Linux distro for a php web server? [on hold]

  - by benjisail

  We are planning to upgrade our hardware and at the same time we plan to reinstall all our web server from a fresh OS. Currently our web server is running on CentOS 4.7 on a dedicated server. We are using Apache, Mysql, PHP, SVN, FTP and all the needed tools for a web server managed through SSH. We plan to use a cloud server for the new web server. I don't know which Linux distro to take for this new server. Should I stay with Centos and just take the latest release 5.4 or should I switch to something else like a Debian base distro (Ubuntu Server)? The thing that I didn't like with CentOS was the none availability of the latest version of PHP and Apache on Yum. This make it harder to keep our webserver updated with the latest technologies... Thanks for your help!

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• How do I know I'm running inside a linux "screen" or not?

  - by Jun Chen

  The "screen" refers to a program mentioned in How to reconnect to a disconnected ssh session . That is a good facility. But there is a question I'd really like to know. How do I know whether I'm running inside a "screen"? The difference is: If yes, I know I can safely close current terminal window, e.g., close a PuTTY window, without losing my shell(Bash etc) session. If no, I know I have to take care of any pending works before I close the terminal window. Better, I'd like this status to be displayed in PS1 prompt so that I can see it any time automatically.

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• Server stop responding, where to look to know what happened?

  - by Cid

  I have a server that has been running for well over 5 months and suddently it stop responding. I couldn't ssh into it or anything else so I decided to reboot it and the reboot fixed it. I'm trying to figure out what happened and I'm not sure exactly where to look. I started to look in /var/log but there are tons of files in there and I'm not sure which one I should pay attention to. I'm slowly going through each one of them but if anyone can point me in the right direction, it would be great. Thanks!

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• How do I log in to the ubuntu 10.04 server using grub2 from a remote computer/terminal with GUI running

  - by Steve Cornall

  I upgraded my server from ubuntu 8.04 to 10.04. It now uses the grub2 bootloader. In 8.04 from the grub log-in page I could select the option log in to server and thereby connect through SSH directly to my server and have the GUI running. I can currently log in to my upgraded server now from any of my 8.04 machines using grub1 with the GUI running. I cannot log in that way from a machine that uses grub2 and ubuntu 10.04. I want to upgrade my entire network to ubuntu 10.04 but cannot until I know how to log in to the network from grub2 with the gui open. I have exhausted all my ideas as to the solution to this problem. Any help would be most appreciated. Thank-you

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• Unix like console for Windows (GIT)

  - by olo

  Currently I am using windows version git software for git, I found it is really hard to copy and paste in the console, and the mouse middle key is not supported. I used to putty SSH way to linux box then do things in putty, but at the moment I only have windows. so does anyone know some tools enable end-users have UNIX console ? Mouse middle key and highlight supported is essential. Thanks in advance for any advices. Update: Downloaded virtualbox then install a copy of Linux..then samba... seems making things complicated but handy.

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• Registering VPS server: some newbie questions [closed]

  - by Angstrem

  I'm new to VPS in particularly and to servers in general. But it turns out that I need to raise and maintain a VPS server. I've decided to register it at https://nodedeploy.com/ but I have lot's of questions, conducted with it. Does that site provide VPS hosting or it is just a web-site hosting? Will the payments for the VPS be done automatically, or I'll have to do them manually? How do I select a VPS OS that will be installed? How do I get the root password? Will it be available after payment? Is ssh access supported there? How can I cancel my account if something goes wrong with my project? What VPS-hosting service would you recommend for using? Maybe, the questions are really full and newbie, but It's really important for me to know that points. I'll be very grateful for any answers.

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• Setting up VPS hosting

  - by RobinFTW

  I'm trying to set up my own vps hosting. It wont be a paid service, just an experiment for me and some nerdy friends. What I'd like to be able to do is this: Run multiple virtual servers on 1 external IP. These servers can run anything from Minecraft servers to simple http servers. They will also need to be accessible thru SSH. What I don't get is how I can address these servers using domain names. I've done some research and found out that I could use Vhosts with Apache. However this only applies to http servers. It was also suggested I'd use a reverse proxy(squid) but this also only applies to http requests. I could just use different ports for different servers, but thats not ideal and not what I want. Can someone suggest a setup? Maybe some tutorials or anything.

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• Run shell script on Linux box from a shortcut/app in Android?

  - by melat0nin

  I have an Ubuntu box which runs XBMC, which crashes occasionally. Since I have no keyboard connected,I have to SSH in, kill xinit, then restart it. I was wondering if there's an elegant way of doing this from my Android tablet, so I don't have to go to my desktop PC. I've used ConnectBot and can log in, but typing is laborious, even using the edit keys to scroll back up through the buffer. It seems as though it should be possible to script this so that I can execute a shortcut, or at least select a predefined script to be executed. This would seem to have plenty of applications, and there could be a site of scripts - restart webserver, reboot, email logs etc

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• Video streaming over multi display units

  - by ramdaz

  We have to share video across around 4/8 terminals at a public facility where we need to display live video from within the facility, as well as display messages(advertisements), and also play videos(not live) which need to be controlled centrally from another location. We can do central location handling over Internet, over ssh. What we want to do is connect cameras to a computer, and use the computer to display over multiple display units. We need to do live titling if possible. Once the live local telecast which usually takes about an hour or two a day, we would like to play other videos locally off the PC server. Preferably everything should run off Linux, since budgets are very constrained.... Addendum -- Its not over WAN, it's over a local area. I prefer not using LAN, we would rather use co-axial cable if possible. The reason is if it's LAN, I need some kind of an Networking device, at least a thin client

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• Apache Tomcat - Responding for IP However Not for Domain

  - by user3322152

  I have just started setting up a VPS. I installed Tomcat to deploy some test applications on. The problem I am having is the following. An 'A' record has been setup for my website's primary domain as vps.mydomain.com. This is resolving fine for SSH and TS3. When it comes to Tomcat, using vps.mydomain.com:8080 does not result in the default landing page. However, 111.222.333.444:8080 does load the default Tomcat page. I read through the manual and within the server.xml added an Alias; this however has not had any effect. Is there any trickery required in order to get Tomcat to serve my applications or is this likely to be some kind of filtering mechanism for requests placed upon me by my hosting provider?

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• Use server git installation in GitHub for Windows

  - by Lg102

  We are using Git as the version control for our website development. I work from a laptop, which is connected to the internal network via a WiFi connection. I've mapped the server drives as network drives in Windows. Commands such as git status take significantly longer for me than they do for my co-workers on wired connections. When connecting to the server using SSH and running commands on the git installation there, performance is even better. Is there a way to configure GitHub for Windows to use the server-installed git (with my credentials)? Note: While our production servers has a user configuration with proper permissions, the development server has only one root user.

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• set a global environment variable in linux that sticks when going root

  - by Scott

  When I SSH into a linux box, I want to have the /etc/profile file save the results of the whoami command to a global environment variable. if I were to go root with the command sudo su -, I do not want that command to run again when gonig root, I want it to stick with the result of whoami as my regular username from before I went root, and I need to access that variable as the root user even though it will run the /etc/profile file again when I go root. What can I do to only run that command once in the /etc/profile command?

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• Locale setting on a Red Hat box

  - by sasuke

  Hi all, Recently our organization got a couple of server boxes which are I guess present in some data-center in UK. The problem is that for some reason the default Locale representation in Java on that server returns en_US instead of the expected en_GB (I confirmed this by running a code on that server which simply outputs Locale.default()). I am pretty sure this has got something to do the way in which the boxes were set up. My question is: what would be the approach to fix this issue now that the OS has been installed? Is there any way I can for a given SSH session set the locale as en_GB instead of the current en_US? TIA, sasuke

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• Access server by hostname without domain

  - by projectshave

  I want to access services on other machines on my home network with just their hostname. In every browser, "http://machine" fails, but adding a period in "http://machine./" works. Is there a way to avoid adding that extra period? My setup is a router with DD-WRT w/ DNSmasq turned on, Win7 machines and several Ubuntu VMs. nslookup works fine with just hostname. Remote desktop works, but TightVNC needs the extra period. ssh needs the period. As I said, all my browsers need the extra period. I'd prefer a solution that doesn't require manually maintaining the hosts file. Thanks.

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• FreeNAS plugins not able to access storage

  - by dave

  I've just setup a FreeNAS box and have a couple plugins (sick beard and SABnzbd) installed. Both of these have you select a directory where downloads should go. My storage is on /mnt/MediaVolume/ however when I navigate to mnt it's an empty directory. When I SSH to the box though, I can see it just fine. I'm thinking it may have something to do with permissions, but I'm not sure. Any suggestions how to allow these plugins to view/have access? Thank you!

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• linux static ip problem

  - by out_sider

  I have a serve running centOS and I'd like to have the following setup: The server needs to have a static ip and be accessible by name. What I want is independently of the network being able to connect the server to the network and access it by name on Firefox as it will be running a web page. I tried setting the ip manually but while the inet addr is set as I want it the Bcast isn't. And I only can ping the server on the Bcast ip and because it is 192.168.2.255 ssh says it's not valid.

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