After these commands I don't think learning a ton of more commands makes you better at working a computer. After this, sitting down to actually setup a working Unix box and then hardening it will teach you a crazy number of commands and things. More importantly it'll teach what all those little processes and services do on the computer.

However, I will say that learning how to effectively use grep and sed are probably the only big omissions from my list. But, those are outside the scope of this little book given those commands have whole books devoted to them.