What are some examples of linux UNIX shell commands

when you are string to learn linux, its always good to remember shell commands. After time, you will memorize the most important command (to you) and won't see to look them up. it happened to me, i started looking at book searching for the right command, but now, its all in my head and whenever i don't remember or forget a command i still look it up in a book. its always a good idea to have a references book.

so anyway, you are here because you want some example of linux shell commands right? ok, here they are?

cal

who

pwd

ls

there more, see if you can guess what these basic ones do?