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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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Generate a random password 30 characters long
Find random strings within /dev/urandom. Using grep filter to just Alphanumeric characters, and then print the first 30 and remove all the line feeds.

List .log files open by a pid
Uses lsof to display the full path of ".log" files opened by a specified PID.

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

Fetch the current human population of Earth
They are using json now

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

coloured tail
tail with coloured output with the help of perl - need more colours? here is a colour table: http://www.tuxify.de/?p=23

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

Calculate days on which Friday the 13th occurs (inspired from the work of the user justsomeguy)
Friday is the 5th day of the week, monday is the 1st. Output may be affected by locale.

continuously check size of files or directories

recursive transform all contents of files to lowercase
In this way it doesn't have problems with filenames with spaces.


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