Commands by vaporub (7)

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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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Get playlist for Livestream on YouTube

get a rough estimate about how much disk space is used by all the currently installed debian packages
The vaule is expressed in megabytes

display a smiling smiley if the command succeeded and a sad smiley if the command failed
you could save the code between if and fi to a shell script named smiley.sh with the first argument as and then do a smiley.sh to see if the command succeeded. a bit needless but who cares ;)

Show a prettified list of nearby wireless APs

Convert YAML to JSON
Converts YAML file to JSON. Note that you'll need to install PyYAML. Also some YAML data types (like dates) are not supported by JSON).

Convert deb to rpm
converts between Red Hat rpm, Debian deb, Stampede slp, Slackware tgz, and Solaris pkg file formats ... It also supports LSB packages.

small CPU benchmark with PI, bc and time.
$ # 4 cores with 2500 pi digits $ CPUBENCH 4 2500 $. $ every core will use 100% cpu and you can see how fast they calculate it. $ if you do 50000 digitits and more it can take hours or days

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

Find usb device
I often use it to find recently added ou removed device, or using find in /dev, or anything similar. Just run the command, plug the device, and wait to see him and only him

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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