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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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Stoppable sleep
A nice way to interrupt a sleep with a signal.

Convert a Python interactive session to a python script
Used to copy and paste a terminal buffer of a python interactive session into an editor

Get IPv4 of eth0 for use with scripts
Combines wgzhao's grep | awk | sed into one awk command.

List docker volumes by container

Count the number of deleted files
It does not work without the verbose mode (-v is important)

Generate trigonometric/log data easily

Check if *hardware* is 32bit or 64bit
This command tell you if your hardware is 32 or 64 bits even if you install a 32bits OS on a 64 bits hardware. If your distro don't support the -q switch, try doing : $ grep &>/dev/null '\' /proc/cpuinfo && echo 64 bits || echo 32 bits

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

List the largest directories & subdirectoties in the current directory sorted from largest to smallest.

Set laptop display brightness
Run as root. Path may vary depending on laptop model and video card (this was tested on an Acer laptop with ATI HD3200 video). $ cat /proc/acpi/video/VGA/LCD/brightness to discover the possible values for your display.


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