a) Unix commands are very cryptic and some of them may not make any sense to us right away. Find out what the following commands below do with the specific argument(s), provide a one-sentence description and give one other example of the usage of each command: man i) man ii) ls -R iii) mkdir peace iv) cat > dog V) who song vi) cd .. vii)passwd viii) alias rm ix) c x) finger xi) find /usr "k*.c" 1 rm -i