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• Other user SSHed from my hardware

  - by Alex

  While logged into our HPC cluster I used w to check out who else was logged in. I happened to notice that it looks like there's another user logged in from my (personal) computer; 19:04:47 up 40 days, 6:39, 44 users, load average: 0.10, 0.14, 0.18 USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT ME pts/4 zerg.neuron12. 18:55 0.00s 0.09s 0.04s w SOMEONE_ELSE pts/35 zerg.neuron12. Sat14 2:27m 0.08s 0.08s -bash Is this something I should be worried out - I tried to kill the other session but had a permission denied message. Is it possible we just both have the same hardware name? I'd have thought that if this were the case the server would give one of us a different name (e.g. zerg1) when we logged in to prevent confusion. This is not an area I have any experience with, so any advice would be greatly appreciated!

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• Installing Ruby on Rails on Ubuntu 10.04: A Living Nightmare

  - by emptyset

  Update #3: Starting over from scratch, shortened this post, decided to re-install a clean copy of Ubuntu 10.04 on a VM and go through the walk-through again. So, all the steps go without a hitch. As root: root@ubuntu:~/rubygems-1.3.7# ruby -v ruby 1.8.7 (2010-01-10 patchlevel 249) [x86_64-linux] root@ubuntu:~/rubygems-1.3.7# gem -v 1.3.7 root@ubuntu:~/rubygems-1.3.7# rails -v Rails 2.3.8 Now, as myself (in a separate term): emptyset@ubuntu:~$ ruby -v ruby 1.8.7 (2010-01-10 patchlevel 249) [x86_64-linux] emptyset@ubuntu:~$ gem -v /usr/local/lib/site_ruby/1.8/rubygems.rb:10:in `require': no such file to load -- rubygems/defaults (LoadError) from /usr/local/lib/site_ruby/1.8/rubygems.rb:10 from /usr/local/bin/gem:8:in `require' from /usr/local/bin/gem:8 emptyset@ubuntu:~$ rails -v bash: /usr/bin/rails: Permission denied So, this appears to be a permissions issue, but I don't understand why. Specifically, if I have to start making things go+rx all over the place, I really need to understand which specific files need the permissions change.

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• Is it possible to skip .rvmrc confirmation?

  - by Viacheslav Molokov

  We are using RVM for managing Ruby installations and environments. Usually we are using this .rvmrc script: #!/bin/bash if [ ! -e '.version' ]; then VERSION=`pwd | sed 's/[a-z/-]//g'` echo $VERSION > .version rvm gemset create $VERSION fi VERSION=`cat .version` rvm use 1.9.2@$VERSION This script forces RVM to create new gem environment for each our project/version. But each time we was deploying new version RVM asks us to confirm new .rvmrc file. When we cd to this directory first time, we are getting something like: =============================================================== = NOTICE: = =============================================================== = RVM has encountered a not yet trusted .rvmrc file in the = = current working directory which may contain nasty code. = = = = Examine the contents of this file to be sure the contents = = are good before trusting it! = = = = Press 'q' to exit the reader when finished reading the file = =============================================================== (press enter to continue when ready) This is not as bad for development environments, but with auto deploy it require to manually confirm each new version on each server. Is it possible to skip this confirmation?

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• How to add higher video resolution in Ubuntu 10.04 (UNR on EEE1101HA)

  - by lexu

  I picked up an ASUS EEE 1101HA with Windows 7 and installed UBUNTU 10.04 Netbook Remix (dual boot). Ubuntu runs fine, but it doesn't recognize that the notebook LCD is 1388x768 and thus only offers 1024x768 and 800x600 as monitor resolution. So .. how can I tell it about that higher resolution? (Have root pwd & vi, una-bash-ed to use both.. ) UPDATE there is currently (early May 2010) no video-driver for the Intel GMA500 "Poulsbo" => no solution exists for now.

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• Puppet won't execute command

  - by tom

  Puppet 0.25.4 on ubuntu point blank refuses to execute the following command: exec {"initiate replica set": command => "echo 'rs.initiate()' | mongo", path => ["/usr/bin","/usr/sbin","/bin"], user => "root", require => Class["mongodb"] } I can execute the command as root myself, so I'm guessing perhaps it's an issue with the shell. Unfortunately upgrading puppet isn't an option (and causes other issues anyway). I've tried specifying explicit paths to the binaries instead of relying on the path parameter, and also changing the command to: "bash -c \"echo 'rs.initiate()' | mongo\"" Still doesn't work. Any ideas? I get an error message saying something like "failed to change from notrun to 0"

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• Jenkins swarm-plugin jar file, won't run in background

  - by JeanMertz

  We're working on an automation script for our Jenkins slaves on a local Unix server. To connect the slaves to the Jenkins master, we use the swarm plugin. Setting up the master was easy, and connecting clients is also easy with a single command. However, I am trying to get the slave command (a java application) to run in the background without stalling the current process, this doesn't seem to work. I've created an init.d file and added it to update-rc.d but that doesn't work. #!/bin/bash /usr/bin/java -jar /root/swarm-client-1.7-jar-with-dependencies.jar -executors 4 I've also tried to run it with an ampersand & to start the process in the background, but that doesn't work either because - from looking at the source - the jar file actually boots another process that is then started in the foreground. Any ideas on how to make this jar file start without stopping the bootstrap script?

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• Ctrl-C not killing process in CMD.EXE

  - by jtl999

  I've had this issue for a while even after reinstalling. Issue happens after I reinstall all my programs and not in a fresh Windows install (obviously). Might have to spin up a VM and install each program 1 by 1. I suspect it's Git for Windows with it's mini Cygwin wrapper causing this issue. Anyway the issue is basically pressing Ctrl-C does not kill the running process. However when I run cmd.exe or Git Bash or administrator Ctrl-C works great again. Disabling UAC seems to break it again. I've made a video of the issue here. Many thanks.

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• All traffic is passed through OpenVPN although not requested

  - by BFH

  I have a bash script on a Ubuntu box which searches for the fastest openvpn server, connects, and binds one program to the tun0 interface. Unfortunately, all traffic is being passed through the VPN. Does anybody know what's going on? The relevant line follows: openvpn --daemon --config $cfile --auth-user-pass ipvanish.pass --status openvpn-status.log There don't seem to be any entries in iptables when I enter sudo iptables --list. The config files look like this: client dev tun proto tcp remote nyc-a04.ipvanish.com 443 resolv-retry infinite nobind persist-key persist-tun persist-remote-ip ca ca.ipvanish.com.crt tls-remote nyc-a04.ipvanish.com auth-user-pass comp-lzo verb 3 auth SHA256 cipher AES-256-CBC keysize 256 tls-cipher DHE-RSA-AES256-SHA:DHE-DSS-AES256-SHA:AES256-SHA There is nothing in there that would direct everything through tun0, so maybe it's a new vagary of Ubuntu? I don't remember this happening in the past.

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• Prevent zsh from trying to expand everything

  - by Attila O.

  Recently switched from bash, I noticed that zsh will try to expand every command or argument that looks like it has wildcards in it. So the following lines won't work any more: git diff master{,^^} zsh: no matches found: master^^ scp remote:~/*.txt . zsh: no matches found: remote:~/*.txt The only way to make the above commands work is to quote the arguments, which is quite annoying. Q: How do I configure zsh to still try to expand wildcards, but if there are no matches, just pass on the argument as-is? EDIT: Possibly related: scp with zsh : no matches found

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• Tutorial for Quick Look Generator for Mac

  - by vgm64

  I've checked out Apple's Quick Look Programming Guide: Introduction to Quick Look page in the Mac Dev Center, but as a more of a science programmer rather than an Apple programmer, it is a little over my head (but I could get through it in a weekend if I bash my head against it long enough). Does anyone know of a good basic Quick Look Generators tutorial that is simple enough for someone with only very modest experience with Xcode? For those that are curious, I have a filetype called .evt that has an xml header and then binary info after the header. I'm trying to write a generator to display the xml header. There's no application bundle that it belongs to. Thanks!

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• Ubuntu Upstart script hangs on start and stop

  - by sbwoodside

  I have an upstart script that will start a custom jetty server. When I do sudo start [myservice] nothing happens. Subsequently, sudo status [myservice] show it as: [myservice] start/killed, process 3586. Here's the script in /etc/init/[myservice].conf: description "[description]" author "[my name and email]" start on runlevel [2345] stop on runlevel [016] respawn expect fork script sudo -u www-data /path/to/grafserv-start.sh >> /tmp/upstart.log 2>&1 end-script And here is grafserv-start.sh: #!/bin/bash /usr/bin/java -Djetty.port=3070 -jar /path/to/grafserv/trunk/start.jar echo "Done starting GrafServ" I've tried redirecting the output of the script command to a tmp logfile, but that file is never created. When I start it, I just get a hang, until I ^C. Also, I tried running it with strace but that gave me a lot of stuff about sockets.

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• Lingering tcp connection in LISTEN state

  - by Silvio Donnini

  My java application can sometimes be killed by an external script. This can be done either with SIGTERM or with SIGKILL. The application is a server which receives many connections per second, and it can be killed while trying to serve them. I would like to restart the application whenever it's killed, so I have prepared a script for that purpose. The problem is that, once the app has been killed, the new application instance can't bind to the port used by the previous instance, because the "Address is already in use". The previous instance's process has been definitely terminated, anyway the offending listening port is still there, but it is assigned to bash (or sh on other machines). Obviouly, my goal is to restart the application and let it bind successfully to the previous address. I've tried waiting more than 200 seconds before restarting to no avail, anyway I can't afford to wait that much. I've encountered this problem on all the machines I've ran the application (which is a jetty server with java 1.6). Any suggestion is appreciated, thanks, Silvio

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• Error: Cannot find a valid baseurl for repo: updates in ffmpeg installation

  - by athomas14super

  Hi I have problem installing ffmpeg. I follow this url: https://www.crucialp.com/resources/tutorials/server-administration/how-to-install-ffmpeg-ffmpeg-php-mplayer-mencoder-flv2tool-LAME-MP3-Encoder-libog.php Setting up repositories core 100% |=========================| 1.1 kB 00:00 rpmforge 100% |=========================| 1.1 kB 00:00 Error: Cannot find a valid baseurl for repo: updates [root@02e7709 src]# yum install subversion ruby ncurses-devel Loading "installonlyn" plugin Setting up Install Process Setting up repositories core 100% |=========================| 1.1 kB 00:00 rpmforge 100% |=========================| 1.1 kB 00:00 Error: Cannot find a valid baseurl for repo: updates [root@02e7709 src]# svn checkout svn://svn.mplayerhq.hu/ffmpeg/trunk ffmpeg -bash: svn: command not found [root@02e7709 src]# svn command not found and throws error Error: Cannot find a valid baseurl for repo: updates I am installing in fedora core 6 64 bit

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• How to rename files in a folder using the ls command output as a pipe ?

  - by user1179459

  I am using GNU/Linux and BASH shell, What i wanted to do is in server is to i need to be able to download the files stating with B* and D* and then rename them to ~B* and ~D*(same file name just ~ in-front) i wrote following which works fine for the downloading part ideally i would like it to use ls command output as well but dont know how to do that. cd inbox get D* get B* ls B*|rename $0 ~B.* bye Any idea ? ideally what i would like to do is ls command to send the list of files one by one to the get command and then the once the get command is completed i want rename command executed renaming the server files

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• Clients not recognizing secondary LDAP groups?

  - by Nick

  I'm having an issue where users who are members of secondary groups in LDAP are not being recognized as members of that group by the client. In this case, user jdoe is not being recognized as a member of the projects group. On the client, getent group shows: projects:*:20001:1001,1002,1003,1004,1005,1006 and getent passwd shows: jdoe:x:1003:10003:John Doe:/home/jdoe:/bin/bash But if I log in to the client as jdoe, and run id, I get: uid=1003(jdoe) gid=10003(jdoe) groups=24(cdrom),25(floppy),29(audio),44(video),46(plugdev),10003(jdoe) It recognizes jdoe's primary group, and the secondary groups that are appended by the client to all LDAP users, but the LDAP secondary groups are not in the list. We can see that jdoe's id is in the projects group, so why is the projects group not showing when jdoe runs the id command? The group objects are basic posixGroup entries, with a memberUid attribute for each of its members. We are using OpenLDAP on Ubuntu 10.04 server and clients.

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• Confusion over terminology SSH, Shell, Terminal, Command Prompt and Telnet

  - by byronyasgur

  I don't usually use SSH if I can get away with it, but if I have to I do of course, and I've seemingly done this for years while still managing to remain slightly confused about these different terms ... from my basic research, this is my understanding, could someone verify/correct this? Telnet ... before SSH, not secure SSH ... ( secure shell ) the general name of the system/protocol Shell ... short name for SSH Command Line/Command Prompt ... the windows version Terminal ... the Unix version, also used by apple. Two further questions: What is the Linux version commonly called, is it just called SSH ? What is bash ?

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• Tutuorial for Quick Look Generator for Mac

  - by vgm64

  I've checked out Apple's Quick Look Programming Guide: Introduction to Quick Look page in the Mac Dev Center, but as a more of a science programmer rather than an Apple programmer, it is a little over my head (but I could get through it in a weekend if I bash my head against it long enough). Does anyone know of a good basic Quick Look Generators tutorial that is simple enough for someone with only very modest experience with Xcode? For those that are curious, I have a filetype called .evt that has an xml header and then binary info after the header. I'm trying to write a generator to display the xml header. There's no application bundle that it belongs to. Thanks!

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• How to run a shell script before restarting a service in Monit in case of a crash

  - by Supratik

  I am using Monit 5.3.2 in my Linux box. I am monitoring some services using Monit. I want to run a script before the running the restart command. I have used the below conditions for the same. if does not exist for 2 times within 3 cycles then exec "/bin/bash -c 'touch /tmp/somefile'" as uid someuser and gid someuser if does not exist for 10 cycles then restart Unfortunately only the restart action is getting executed. Can anyone please help me to identify why the first rule is not executed ? Is there are any other way to solve the problem ?

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• Ubuntu Not Starting After Installing Software Updates

  - by Prabhu

  I just did a software update on my Ubuntu 9.10, after that it asked me to restart my system which i did and once i did that, grub opend some simple bash shell or something... i dont know how do i run ubuntu now??? Ubuntu 9.10 was installed 1 week back using the wubi installer... which is like a one click install from windows... it is installed on the same partition as winxp... i chose 12 gb hd space while installing ubuntu.. it was working good for 1 week... i decided to do the software updates today morning and now its not even starting!!!

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• ps ux on OSX shows user for ps command to be root? Is this normal?

  - by snies

  I am running OS X 10.6.1 . When i am logged in as a normal user of group staff and do a ps ux it lists my ps ux command as being run by root: snies 181 0.0 0.3 2774328 12500 ?? S 6:00PM 0:20.96 /System/Library... root 1673 0.0 0.0 2434788 508 s001 R+ 8:16AM 0:00.00 ps ux snies 177 0.0 0.0 2457208 984 ?? Ss 6:00PM 0:00.52 /sbin/launchd snies 1638 0.0 0.0 2435468 1064 s001 S 8:13AM 0:00.03 -bash Is this normal behaviour? And if so why? Please note that the user is not an Administrator account and is not able to sudo.

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• Unable to install bin files.(No such file or directory error)

  - by rogerstone

  I wanted to install adobe reader on my ubuntu 10.10(Maverick Meerkat).I have downloaded the file and copied it on my desktop.I had then browsed to the desktop directory through command line terminal. I had tried all the possible combinations of the commands but still i get a "file or directory does not exist error" roger@ubuntu:~/Desktop$ chmod a+x AdbeRdr9.4-1_i486linux_enu.bin roger@ubuntu:~/Desktop$ sudo ./AdbeRdr9.4-1_i486linux_enu.bin sudo: unable to execute ./AdbeRdr9.4-1_i486linux_enu.bin: No such file or directory I tried without the sudo and this is what i get roger@ubuntu:~/Desktop$ chmod a+x AdbeRdr9.4-1_i486linux_enu.bin roger@ubuntu:~/Desktop$ ./AdbeRdr9.4-1_i486linux_enu.bin bash: ./AdbeRdr9.4-1_i486linux_enu.bin: No such file or directory The file is present in the desktop.Where am i going wrong? P.S:This is not a duplicate of the question Cannot install .bin package on Ubuntu

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• httperrors for Linux

  - by Aaron McRuer

  I'm here because the Google has failed to get me what I need. I just recently graduated from university, and I'm working on a website. Back in college I used the school's web server for my projects, and there were a few tools that aided in the process. One was a Linux program/script/executable/prayer to the computing gods called "httperrors". You typed that into bash, and it would pop up any errors that would occur while running the web server. Specifically, if you had errors in your php code, it would tell you what was wrong. I guess it was a debugger of sorts. I can't find any such program's details online. Does this sound familiar to anyone?

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• Is Mac OS X open source?

  - by hasen j

  I learned recently (on superuser) that Mac OS X uses the bash shell. I also know that OS X has a UNIX core. I was searching for information about OS X and Open Source on google, but what I found was this site: http://www.opensource.apple.com/ Which seems to include the source code for OS X. For instance, one of the links reads: Mac OS X 10.5.7 Source So, is OS X open source? There's an Apple Public Source License, but I'm bad at understanding legalese. Update Extra/Bonus question: Besides the kernel, What about the various other pieces? The X server? Window Manager? File explorer? etc. What's open source and what's not?

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• Launchd execute command when folder contents modified or changed.

  - by ThomasReggi

  For the past two days i've been trying to get a launchd plist to execute a script "program" when the contents of a folder on my desktop contents have modified or changed. I've gone through tons of configuration settings and have tried the Users/me/Desktop/folderinquestion and Users/me/Desktop/folderinquestion (with and without trailing slash). The script executes only when something is added or removed but it doesn't recognize when files are updated and subdirectories. launchd is really my last hope to getting this to working i've already exausted folder actions, and bash scripts, uninstallable linux methods etc. I have used Lingon to create my plists and have followed this youtube tutorial. Any help would be greatly appreciated. This is what I have right now, and like I said does not work when folder is modified or changed IDEA: Thinking about creating two separate plists that reference each other one plist can watch a folder for additions and subtractions and when one occurs it can create another plist that watches every file in the folder, this could also be recursive and count in for subdirectories.

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• Debian server doesn't free memory after backup

  - by stan31337

  I have production server that is running Debian 6.0.6 Squeeze #uname -a Linux debsrv 2.6.32-5-xen-amd64 #1 SMP Sun Sep 23 13:49:30 UTC 2012 x86_64 GNU/Linux Every day cron executes backup script as root: #crontab -e 0 5 * * * /root/sites_backup.sh > /dev/null 2>&1 #nano /root/sites_backup.sh #!/bin/bash str=`date +%Y-%m-%d-%H-%M-%S` tar pzcf /home/backups/sites/mysite-$str.tar.gz /var/sites/mysite/public_html/www mysqldump -u mysite -pmypass mysite | gzip -9 > /home/backups/sites/mysite-$str.sql.gz cd /home/backups/sites/ sha512sum mysite-$str* > /home/backups/sites/mysite-$str.tar.gz.DIGESTS cd ~ Everything works perfectly, but I notice that Munin's memory graph shows increase of cache and buffers after backup. Then I just download backup files and delete them. After deletion Munin's memory graph returns cache and buffers to the state that was before backup. Here's Munin graph: Unfortunately I don't have enough rep to add image here. So here's a link:

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