Shell access is for advanced users only. Here are some typical useful commands when using shell access:

HOW TO DECOMPRESS A FOLDER:

tar -vjxf filename.tar.bz2
tar -xf filename.tar
tar -xzvf filename.tar.gz

CHMOD FILES:

chmod -R 755 www

TO COMPRESS FOLDER:

This command will tar up a directory (mystuff) into a tar file:

tar -cvf mystuff.tar mystuff/

TO DELETE A FOLDER:

rm -r

TO DELETE A FILE:

rm