File Check
	cd
	pwd
	ls -lrt
	grep    (-e | -v )
	cat | touch | vi
	less | more 
	head
	tail

File Related

	mv (move | rename)
	rm
	chmod
	chown

System - Slow
	ps
	kill <pid>

General Move / CREATE
	mkdir
	rmdir

	awk
	cut
	sed