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• Kill all currently running cron jobs

  - by Adelphia

  For some reason my cron job scripts aren't exiting cleanly and they're backing up my server. There are currently a couple hundred processes running for one of my users. I can use the following command to kill all processes by that user, but how can I simplify this to kill only crons? pgrep -U username | while read id ; do kill -6 $id ; done It would be dangerous to run the above command as is, correct? Wouldn't that kill mysql and other important things?

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• Search text in list of files. Double search. Search files within a files

  - by wormhit

  I'm trying to execute double search within files and return file names. I'm using find ./ -iname '*txt' | xargs grep "searchtext" -sl to find file names with 'searchtext' in them. Command is returning a list of files. How can I find "othersearchtext" in those already found files and show them in the same fashion? #### EDITED Answer: grep -l "othersearchtext" $(find ./ -iname '*txt' | xargs grep "searchtext" -sl)

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• Where is OS X's $PATH set?

  - by thepurplepixel

  I have a little $PATH problem: I just reinstalled MacPorts, and my path contains the MacPorts directories as it should at the beginning of $PATH. However, despite me having no such setting in my ~/.bashrc, ~/.bash_profile or ~/.profile, /Library/Frameworks/Python.framework/Versions/2.6/bin is somehow getting appended to the beginning of my $PATH: 0 07:15:11pm ~ $ echo $PATH /Library/Frameworks/Python.framework/Versions/2.6/bin:/opt/local/bin:/opt/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin I'd like to remove it as the MacPorts version of Python is newer. This must be appended after all the above-listed files are read, but I can't think of where. There is no mention of this in /etc/profile, /etc/bashrc or /etc/paths. Any assistance would be greatly appreciated. Thanks!

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• running a command line app with sudo and password automatically on start up OS X (Lion)

  - by Designer023

  I need to run an app at startup/login on my mac. I want it to launch in the background and start doing it's work without interrupting me or me having to start it up because I invariably forget and then when I need it, it wasn't running! I have tried using applescript to tell terminal to run it and type my password in, but it ends up opening multiple Terminal windows and not working. Ideally I need a script that I can just add to the user login items and it will run for me. The app has no way of taking a password argument either and it has a password as well as the sudo! I need a solution that can either be done as an applescript (which can be made into an executable) or i need a commandline script but I have no idea about them. This is the manual code I type >sudo serverStatus >password:123456 >password:serverpass Not sure if this is the right stack to ask, but I have no idea now and it's above my head! Thanks :D My applescript: tell application Terminal activate do shell script "sudo serverStatus" delay 5 do shell script "123456" delay 2 do shell script "serverpass" end tell

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• How can I start new window in the same screen session automatically?

  - by Mato

  I read How can I start multiple screen sessions automatically?, but I don't understand the first accepted reply: screen -dmS "$SESSION_NAME" "$COMMAND" "$ARGUMENTS" In my case I need to automatically create one screen session for one script, and afterwards I need to create a new window in the same session for another script. Manually, I would: run screen enter command CTRL+A CTRL+C enter command CTRL+A CTRL+D How can I do this automatically in a script? A simple example would help me a lot. Thank you for replies.

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• Replacing every 10th pipe with new line in unix

  - by user327958

  Lets say I have fields: name, number, id I have a data file: name1|number1|id1|name2|number2|id2...etc I want to replace every 3rd pipe with a new line or '\n' so I get: name1|number1|id1 name2|number2|id2 I'm having no luck with awk or sed. I've tried the following, and variations of: awk '/"\|"/{c++;if(c==10){sub("\|","\n");c=0}}1' inputfile.txt sed 's/"|"/"\n"/2' inputfile.txt It tells me awk: syntax error near line 1 awk: illegal statement near line 1 awk: syntax error near line 1 awk: bailing out near line 1 Any help is greatly appreciated! EDIT: Thank you!

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• Run script on login with ssh

  - by user912447

  I have a feeling this is quite easy to do but every solution found on google has to do with adding a script to be run whenever someone logs into the machine. What I am looking for is a way to run a script when only I log into the machine. I ssh into a shared computer and need to have it load a couple modules for me and I imagined the easiest way to do this would to just run a script on login. Is there a simple way?

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• merge pieces of file together

  - by veilig

  I have a directory tree of files I need to loop through and reformat the lines. can I do this with sed with some combination of find? for each file, I'll need to adjust the text in the file from ... * @category Foo * @package Bar ... into just this (Remove the @category line, but prepend the value to the package annotation value) ... * @package Foo/Bar ... what is the most efficient way of doing this? its a few hundred files that will be modified.

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• How to check there are no html files in current directory?

  - by kev

  I have a script which will download html files into current directory. Then it'll generate a report based on these html files. At last, it'll delete all these html files. So, when I run this script, I want to make sure there is no html files in current dir. This is what I got: if ls *.html >/dev/null 2>&1; then echo 'clear HTML files first' exit fi Is there any easy way to check?

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• delete everything but one directory

  - by Zimno

  I've got a /tmp/test directory. In it I've got a mixture of files and directories. One of those directories is /tmp/test/to_be_kept. Now I'd like to know how do I delete all the files and directories apart from /tmp/test/to_be_kept and everything what's in it? Thanks

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• What is a good way to get back to the command prompt discarding STDOUT and STDERR

  - by elementz

  I often launch applications from the cli via e.g. command & to immediately get back to the prompt back. The downside of this is, that I still get STDOUT and STDERR. So I use command &> /dev/null to discard those outputs. This can get quite a chore, when having to write this often during a day. So my question is, is there a better (read shorter) way to discard of STDOUT and STDERR when not needed? What could be done? write a wrapper script to launch applications? What would be an elegant way to do this?

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• Is \d equal to [0-9] in sed?

  - by user3872279

  7 00:00:30,008 --> 00:00:30,066 by line 8 00:00:31,038 --> 00:00:34,050 or later in the nineteen seventies it was usually a 9 00:00:34,005 --> 00:00:38,634^M video consul but the council was not capable of displaying arbitrate graphics 10 The above lines is in a file named 2.txt. I wanna the lines which doesn't start with number. In practice, sed -i '/^[0-9]+/d' 2.txt works good. However, sed -i '/^\d+/d' 2.txt doesnot. The \d shouldn't be equal to [0-9] in regex?

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• tab completion for service command on debian

  - by markus

  I have two systems with debian squeeze installed. On one system when I type: service <TAB> it shows me all available service (from /etc/init.d) on the other system it shows me all files from the current directory. Does anyone know which setting changes that behaviour ? UPDATE: The file /etc/bash_completion.d/service was missing. I copied it from the machine where it is working. If I type complete -p | grep service it shows me: complete -F _service service On the machine where it is not working that command shows me nothing. I executed complete -F _service service in the command line, after that, the command service <TAB> shows me: service -su: completion: function `_service' not found this function is defined in the service file I recently copied, for some reasons it can't be found ...

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• How to run script from root as another user (with user PATH)

  - by Sandra

  I would like to have these commands run as the ss user from root mkdir bin cp -r /opt/gitolite . gitolite/install -ln gitolite setup -pk ss.pub mkdir -p .gitolite/hooks/common ln -s /opt/pre-receive .gitolite/hooks/common/ so everything is executed in /home/ss. The 4th line requires $HOME/bin as you can see from the 3rd line. The only way I can get it to work is by adding su -c "command" ss to each line, which is not a nice hack. This is an extension to my previous question, where I wasn't precise enough. Question How do I run all these commands as a script in a practical way?

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• what TERM to use to get rid of color escape codes?

  - by slivu

  Is there a way to get rid of escape codes in terminal output? Say even if the script are sending that codes they are ignored by terminal and text displayed as is, without colors, bolds etc. I need to display terminal output on a HTML page. For now i'm using javascript to remove escape codes, but it becomes clunky cause i receive output by chars, and have to wait until all content received then update it, leading in weird effects.

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• ls color schemes

  - by adam n

  What's your favorite color scheme for ls in bash? There's lots of vim color schemes out there, but I'm having trouble finding any for ls. Does anyone know any good websites with sample ls color schemes? If you've made a custom one, attach a screenshot, along with the line to put in ~/.bash_profile. export LSCOLORS=DxGxcxdxCxegedabagacad

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• What are the differences between fish and zsh ?

  - by Julien Nicoulaud

  I'm a bash user willing to switch to a more friendly and advanced shell. I read a lot of good things about zsh, but I gave a quick test at fish and it seems great too. Both seem very close in term of features, what is your opinion about those two shells ?

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• how to start growl via the command line

  - by adam n

  I have a bash script that uses growlnotify to send notifications. However, growlnotify doesn't work if Growl isn't already running, and it won't auto start Growl if it needs it, either. So I want to be able to check if Growl is running, and then start it if it isn't. I'm thinking of doing something like: g=$(ps -e | grep Growl | grep -v grep) if [ -z "$g" ] # Growl isn't running then # (start Growl) fi How would I start Growl via the command line?

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• how to find perl has installed in a system

  - by abubacker

  I have written a perl script , I just want to give it to every one , for that I planned to write a bash script which is used to test the environment of a user and find whether that environment is capable of running the perl script. I want to test the things like o. Whether perl has installed in that system o. Perl should have the version 5 or more o. Whether the module JSON::Any is available Any suggestion would greatly appreciated :-)

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• How to enable tab completion from the terminal specific to the executable

  - by Synesso

  In bash, I believe it is possible to enable tab completion on the terminal for terms that are specific to the executable being invoked. For example, given an executable "eat" with valid arguments {cake, carrot, banana}, typing 'eat car' should complete to 'eat carrot'. I believe this is possible because I have seen it with 'ant' tab-completing its targets (though how this was set up I don't know). How can this behaviour be implemented?

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• extract domain name from url

  - by Ben Smith

  How do I extract the domain name from a url using bash? like: http://example.com/ to example.com must work for any tld, not just .com

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• How to sort output of "s3cmd ls"

  - by dba.in.ua

  Amazon "s3cmd ls" takes like this output: 2010-02-20 21:01 1458414588 s3://file.tgz.00 2010-02-20 21:10 1458414527 s3://file.tgz.01 2010-02-20 22:01 1458414588 s3://file.tgz.00 2010-02-20 23:10 1458414527 s3://file.tgz.01 2010-02-20 23:20 1458414588 s3://file.tgz.02 How to select all files of archive, ending at 0 ... X, with the latest date of fileset ? Bash, regexp ? Thanx!

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• GUI Application on Windows and Linux

  - by Kiran

  Hello, I would like to export the Bash Shell Automation Script Project to a GUI Project which can run in both Windows and Linux. Which Programming Language would be better suited for this ? Any suggestion would be really helpful. Thanks Kiran

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• Temporary operation in a temporary directory in shell script

  - by jhs

  I need a fresh temporary directory to do some work in a shell script. When the work is done (or if I kill the job midway), I want the script to change back to the old working directory and wipe out the temporary one. In Ruby, it might look like this: require 'tmpdir' Dir.mktmpdir 'my_build' do |temp_dir| puts "Temporary workspace is #{temp_dir}" do_some_stuff(temp_dir) end puts "Temporary directory already deleted" What would be the best bang for the buck to do that in a Bash script? I want to trap

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• Regex and Arrays

  - by syker

  What is a regex I can write in bash for parsing a line and extracting text that can be found between two | (so that would be ex: 1: |hey| 2: |boy|) and keeping those words in some sort of array?

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