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commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

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Count all the files in the directory and child directories

list block devices
Shows all block devices in a tree with descruptions of what they are.

Play musical notes from octave of middle C
Are there any creative pieces of music that can be created using beep and the shell? I'd love to hear it!

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

Opens files containing search term in vim with search term highlighted
Takes the same arguments that ack does. E.g. ack-open -i "searchterm" opens all files below the current directory containing the search term. The search term is also highlighted within vim if you have hlsearch set. Works on zsh, unsure if it works on bash. Note: ubuntu users have to change ack to ack-grep unless you already have it aliased (as I do)

Replaces a color in a PDF document, useful for removing a dark background before printing.
The pdf is first converted to a bitmap, so change "-density" to match your printer resolution. Also be careful about the RAM required. In this example rgb(0,0,0) is replaced by rgb(255,255,255), change to suit your needs.

Go to the Nth line of file

convert wav files to ogg
cd to the folder containing the wav files and convert them all to ogg format. in my sample output i use the -a and -l flags to set the author and album title. to get the oggenc program in ubuntu linux run: sudo apt-get install oggenc

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

Chage default shell for all users [FreeBSD]
This command will set bash as the default shell for all users in a FreeBSD system.


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