me:~$ tldr seq seq Output a sequence of numbers to `stdout`. More information: https://www.gnu.org/software/coreutils/seq. - Sequence from 1 to 10: seq 10 - Every 3rd number from 5 to 20: seq 5 3 20 - Separate the output with a space instead of a newline: seq -s " " 5 3 20 - Format output width to a minimum of 4 digits padding with zeros as necessary: seq -f "%04g" 5 3 20