cd ~	change to user's root directory
cd dir	change directory to dir/
chmod ### file	change file's mode/permission. Learn more here.
cp file1 file2	make a copy of file1 as new file2.
date	show the server's time and date.
exit	exit from shell.
ls	list the files in the current directory. "ls -l" gives more detail list.
man command	show the manual page for command.
mv file1 file2	rename the file name from file1 to file2.
mv p1/file p2/file	if p1 is different from p2, than it will moves file from directory p1 to directory p2.
pico textfile	edit textfile such as HTML file, scripts, etc.
ps	show the list of your processes. "ps -auxww" shows more detailed list.
pwd	show what's the current path.