Shell Knowledge


Spawn a TTY using Python

Spawn a “real” TTY. Useful for sudo, su, ssh…

python -c 'import pty; pty.spawn("/bin/sh")'

Manually generate a crypt (/etc/shadow) password

Generate a UNIX crypt password with a given salt and password

openssl passwd -1 -salt <SALT> <PASSWORD>

# openssl passwd -1 -salt salty bacon
$1$salty$OxTbIoRN3a6XyEn362VfU0

Found here

Get total duration of video files

Get the total duration of video files in a directory.

exiftool -n -q -p '${Duration;our $sum;$_=ConvertDuration($sum+=$_)}' */*.mp4 | tail -n1

Found here

Iterate over lines in a file or a command

Execute any command on every single line of a given file.

while read p; do
    echo $p;
done < file

This may be used also on multi-line spaced outputs.

find S0* | while read p; do
    echo $p;
done