If you don’t know linux well…rm -rf… is basically a ICMB nuke war (be extremely sure when you use it…it will nuke your system (and brick some)) if you typo…don’t use that…basically it is never a good idea. rm -r if you screw up…less bad…but not so good.
-r means recursive (so will run up any directory tree…but linux will stop it doing really stupid things)
-f means force…yeah it will nuke anything
-rf means if you typo it will wipe out anything…never use that unless your damn sure you know exactly what your doing…I have never used it and I’m an admin/sysop.