Linux - The Elite List
Create bootable USB using 'dd' command.
sudo dd bs=4M if=path/to/input.iso of=/dev/sd conv=fdatasync status=progress
Install .deb file in Linux.
sudo dpkg -i /path/a.deb
Display the first few words of a file in Linux.
head -c 100 filename
Display last few words of a file in Linux.
tail -c 100 filename
Append words to the end of the file in Linux.
echo 'input' >> filename
Insert text into the begining of a file in Linux.
sed -i '1s/^/abcde /' filename
Kill a linux process by its name.
kill -9 $(ps -ef | grep "name" | grep -o "[0-9]*" | head -1)
Cron job at random time
* */6 * * * sleep $[ ( $RANDOM % 60 ) + 1 ]m; /path-to-script