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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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rsync + find
rsync from source to dest all between >30

eavesdrop
Record off the microphone on a remote computer and listen to it live through your speakers locally.

Random unsigned integer
works at least in bash. returns integer in range 0-32767. range is not as good, but for lots of cases it's good enough.

Convert CSV to JSON
Replace 'csv_file.csv' with your filename.

Print the IPv4 address of a given interface

Display rows and columns of random numbers with awk
Displays six rows and five columns of random numbers between 0 and 1. If you need only one column, you can dispense with the "for" loop.

Optimal way of deleting huge numbers of files
Optimal way of deleting huge numbers of files Using -delete is faster than: $ find /path/to/dir -type f -print0 | xargs -0 rm $ find /path/to/dir -type f -exec rm {} + $ find /path/to/dir -type f -exec rm \-f {} \;

Rename files in batch

pngcrush all .png files in the directory
Find all pngs in directory structure and pngcrush them, none destructive. You can just remove the "{}.crush" part if you want destructive.

mp3 streaming


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