Permits on Files (use "+" to set permissions and "-" to remove)
ls -lh	show permits
ls /tmp | pr -T5 -W$COLUMNS	divide terminal into 5 columns
chmod ugo+rwx directory1	set permissions reading (r), write (w) and (x) access to users owner (u) group (g) and others (o)
chmod go-rwx directory1	remove permits reading (r), write (w) and (x) access to users group (g) and others (or
chown user1 file1	change owner of a file
chown -R user1 directory1	change user owner of a directory and all the files and directories contained inside
chgrp group1 file1	change group of files
chown user1:group1 file1	change user and group ownership of a file
find / -perm -u+s	view all files on the system with SUID configured
chmod u+s /bin/file1	set SUID bit on a binary file - the user that running that file gets same privileges as owner
chmod u-s /bin/file1	disable SUID bit on a binary file
chmod g+s /home/public	set SGID bit on a directory - similar to SUID but for directory
chmod g-s /home/public	disable SGID bit on a directory
chmod o+t /home/public	set STIKY bit on a directory - allows files deletion only to legitimate owners
chmod o-t /home/public	disable STIKY bit on a directory