Deactivate beep in console mode linux

setterm -blength 0

How to know size of a binarie in sql

datalength(binary)

Kill a process with a command on Windows

taskkill /F /IM notepad.exe >nul 2>&1

Select the end of a chain

#:~$ toto="bonjour le monde"
#:~$ echo ${toto:$((${#toto}-10))}
r le monde

${var:x} : extract sub chain of $var from char n° x to the end.
$((….)) : allow to do calculation