Syntax you keep forgetting

ITT commands (mainly for unix-like) that you have to man time and again because you always forget their syntax.

I call GNU tar. Luckily, there's an examples section in the manpage, but srsly, -f must always go there, but god help me if I accidentally add -c when extracting.

Also inb4 flamewar of newfags calling others newfags.

commands? lol, it's like i travelled back in time to the eighties

You have to be pretty dumb to confuse -c with -f really.  Switches in programs tend to be quite easy to remember but some times I often have to consult certain switches in grep and find.

lol

I code in VHDL and for some reason or other I always forget my terminators ;

I can never remember what comes first in ln, destination or target.