Quick'n'Dirty UNIX Reference

pwd	tell me what directory I am currently in
ls	short list of directory contents
ls -l	detailed list of directory contents
ls -l  |  more	detailed list of directory contents, served up one screenful at a time; hit the space bar to see the next screenful
cd public_html	take me to my public_html subdirectory
cd	take me to my home directory
cd ..	take me to the parent of the current directory
mkdir project1	create a new subdirectory in the current directory called project1
chmod 755 project1	make project1 readable and executable (but not writable!) for everybody
cp file1 newfile	make a copy of file1 called newfile
cp file1 ../project2/newfile	make a copy of file1 called newfile in the parallel subdirectory project2
rm file1	remove (delete) file1
rm *	remove everything in this directory!
rm *.png	remove everything with a name ending in .png in this directory
rmdir subdir2	remove subdirectory subdir2 (must be empty)
mv file1 newname	rename file1 as newname
mv file1 subdir3	move file1 to the existing subdirectory subdir3 (will simply rename file1 if subdir3 doesn't already exist)
clear	clears the SSH window (good idea after a Pico edit session)
quota -v	tell me how much of my disk quota I have used