Inserting noop characters#
Quotes (even number of non-mixed) will be ignored by bash. $ c'a't becomes $ cat. Similar for $ c"a"t
Backslashing chars (other than \n etc, obs) will have no effect. $ c\at becomes $ cat.
Use the positional param character $ c$@at becomes $ cat
Manipulate the characters#
$(rev<<<'tac') becomes cat. Experiment with other things like rot13.
Encode the command#
$(base64 -d<<<"Y2F0Cg==") becomes cat