Welcome to the world of commands and the command line interface. We are going to learn a lot of commands, which may sound a lot like the incantations by witches and wizards. These commands, when combined together will create solutions that almost look magical.
Here is a command sequence that creates a 5x5 table of numbers between 1-25
$ echo {1..25} | xargs -n1 printf "%02d\n" | xargs -n5
01 02 03 04 05
06 07 08 09 10
11 12 13 14 15
16 17 18 19 20
21 22 23 24 25