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