Based on that, looks fine. Try again. Also try to open Bash before, maybe you are using another type of shell.
UPDATE:
Check if you have help command - not sure, but I think it is Bash only.
Based on that, looks fine. Try again. Also try to open Bash before, maybe you are using another type of shell.
UPDATE:
Check if you have help command - not sure, but I think it is Bash only.