Commands using arecord (9)

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Converting video file (.flv, .avi etc.) to .3gp
ffmpeg -i = input file name -s = set frame size, qcif=176x144 -vcodec = force video codec -r = frame-rate [default = 25] -b = bit-rate [200 kb/s] -acodec = force audio codec -ab = audio bitrate in bits/s [64k] -ac = no. of audio channels [1] -ar = audio sampling frequency [44100 Hz] optional: -sameq = use same video quality as source (implies VBR) -f = force format -y = overwrite output files

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

Mutt - Change mail sender.

Update twitter with curl
Same as below, but no quotes are necessary when twitting more than one word

Rename files to be all in CAPITALS
Simple bash/ksh/sh command to rename all files from lower to upper case. If you want to do other stuff you can change the tr command to a sed or awk... and/or change mv to cp....

Add all unversioned files to svn

Create a mirror of a local folder, on a remote server
Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

grep -v with multiple patterns.
That's what the sed command should've been, sorry.

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

A simple command to toggle mute with pulseaudio (any sink)
0 can also be replaced by the source name, e.g. alsa_output.pci-0000_00_1b.0.analog-stereo


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