Commands using g++ (2)

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Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

mplayer -vo aa foo.mpg
mplayer -vo caca will give you a similar result but in color

Turning off display
To turn off monitor: xset dpms force off To turn on, simply press a key, or move mouse/mousepad.

find directory with most inodes/files
Find which directory in one filesystem that contains most inodes or files.

Convert seconds to [DD:][HH:]MM:SS
Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Rename files in batch

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

Limit the transfer rate and size of data over a pipe
This example will close the pipe after transferring 100MB at a speed of 3MB per second.

Download all images from a 4chan thread
Useful for ripping wallpaper from 4chan.org/wg

Replace spaces in filenames with underscores
It's the rename-tool from debians perl-package.

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