| 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 (o) |
| chown user1 file1 |
change owner of a file |
| chown user1 -R directory1 |
change user owner of a directory and all the files and directories contained inside |
| chgrp gruppo1 file1 |
change group of files |
| chown user1:gruppo1 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/file_eseguibile |
set SUID bit on a binary file - the user that running that file gets same privileges as owner |
| chmod u-s /bin/file_binario |
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/comune |
set STIKY bit on a directory - allows files deletion only to legitimate owners |
| chmod o-t /home/comune |
disable STIKY bit on a directory |