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An alarm clock using xmms2 and at
Nice little alarm clock to wake you up on time (hopefully). You can also do 'echo "vlc path/to/song" | at 6:00

Find files and list them sorted by modification time
This uses the ability of find (at least the one from GNU findutils that is shiped with most linux distros) to display change time as part of its output. No xargs needed.

PulseAudio: set the volume via command line
If you have more than one SINK

Add temporary swap space
In addition to a swap partition, Linux can also use a swap file. Some programs, like g++, can use huge amounts of virtual memory, requiring the temporary creation of extra space.

Limit the cpu usage of a process
Similar to `cpulimit`, although `prlimit` can be found shipped with recent util-linux. Example: limit CPU consumption to 10% for a math problem which ordinarily takes up 100% CPU: Before: $ bc -l

One liner to kill a process when knowing only the port where the process is running

Backup your hard drive with dd
This will create an exact duplicate image of your hard drive that you can then restore by simply reversing the "if" & "of" locations. $ sudo dd if=/media/disk/backup/sda.backup of=/dev/sda Alternatively, you can use an SSH connection to do your backups: $dd if=/dev/sda | ssh [email protected] dd of=~/backup/sda.backup

Search recursively to find a word or phrase in certain file types, such as C code
ack search recursively by default

Find the package that installed a command

generate 30 x 30 matrix
or $ od /dev/urandom -w60 -An|sed 's/ ..../ /g'|head -n 30 (this one lacks digits 8 and 9)


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