Shell Scripting

2011-01-05 1 min read Bash Learning Linux

Here are some links for bash programming that you may find useful.

http://tips-linux.net/en/content/pro-bash-programming

http://tips-linux.net/en/content/expert-shell-scripting

http://tips-linux.net/en/content/beginning-linux-command-line

http://tips-linux.net/en/content/bash-pocket-reference

http://tips-linux.net/en/content/linux-command-line-and-shell-scripting-bible

Linux – Learning the Shell (edugeek.net)
10 Useful Tools, Websites And Tricks to Help You Master Linux Command (maketecheasier.com)
lf-submit.sh – Bash mplayer Last.fm scrobbler (yjl.im)
Linux command line tricks you need to know: IO redirection and piping (interstellr.com)
imabonehead: Houcem HACHICHA’s Blog: My top ten shell/bash tricks! (houcemhachicha.blogspot.com)

Execute a command with a timeout

2010-12-29 1 min read Bash Learning

Execute a command with a timeout

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      &nbsp;timelimit -t100 somecommand
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I found this in Ubuntu repos, and consider it better than timeout.

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write the output of a command to /var/log/user.log… each line will contain $USER, making this easy to grep for.

2010-12-28 2 min read Bash Learning Linux

write the output of a command to /var/log/user.log… each line will contain $USER, making this easy to grep for.

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      &nbsp;log() { (echo "$ $@";$@) | logger -t $USER; }
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This command is useful if you want to copy the output of a series of commands to a file, for example if you want to pastebin the output from ‘uname -a’, ‘lspci -vvv’ and ‘lsmod’ for video driver trouble-shooting on your favorite Linux forum.

Empty a file

2010-12-26 1 min read Learning Linux

This one is for those who know the “touch” command. Hope all of us do not follow a command just because it is on one of the popular site without trying to understand the command and the output.

Bash Script Beautifier

2010-12-23 1 min read Bash Learning Linux

Today I was working on a bash script written by someone else. And the script was maintained since long and had actually become quite big and there was no indentation followed. So, you can understand how difficult it was to understand the script. So, I set my foot forth to first find a beautifier for the bash script before I fixed it and my search ended here.

List all installed rpm packages and it’s size

2010-12-09 1 min read Fedora Linux

If you are looking for a command to see the disk usage by each of the rpm‘s then you can use this command:

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      &nbsp;rpm -q --queryformat "%10{SIZE}\t%{NAME}\n"
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And if you use this command very regularly then you can create an alias like

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      &nbsp;alias rpm_size='rpm -q --queryformat "%10{SIZE}\t%{NAME}\n" '
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and use it like

New feature in Gnome/Nautilus

2010-12-05 1 min read Fedora GNOME

One of the things that I never realized that I am missing in Nautilus until they put the feature in was this. When a file is being copied and there is conflict, there should be option to rename the new file being copied. Also, if the file being copied is image then a small preview/thumbnail would be good.

Yesterday while copying some files, suddenly I noticed that this feature is there now. Pretty useful feature to have. Here’s the screen-shot.

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