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Reload all sysctl variables without reboot
Use `sysctl -p` without argument will only load /etc/sysctl.conf, but user configs always put in /etc/sysctl.d/*.conf, `sysctl --system` will load all the config files

Screenshot Directly To Clipboard
This will take a screenshot of a selected area and save it as foo.png as well as sending it straight to the clipboard for pasting into GIMP, Anki, Zim, etc.

Convert a flv video file to avi using mencoder

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

list with full path

find system's indianness

Command line calculator
works with fractions like 1/3.5

Create and access directory at the same time
Create and access directory (edited)

Get own public IP address
Returns your external IP address to the command line using only wget

Recursively find disk usage, sort, and make human readable (for systems without human-readable sort command)
Recursively find disk usage, sort, and make human readable: * For systems without human-readable sort command * awk, not perl

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