5. Permissions

5.1. Understanding Permissions

Tab. 5.1. Understanding Permissions
Permission Octal Binary Description
0 000 Cannot read, execute or modify
–x 1 001 Can execute
-w- 2 010 Can write (modify)
-wx 3 011 Can modify and execute
r– 4 100 Can read
r-x 5 101 Can read and execute
rw- 6 110 Can read and write
rwx 7 111 Can read, write and execute

5.2. Changing Permissions

5.2.1. chmod

5.2.2. chown

5.2.3. chgrp

5.3. UMASK

5.4. Sticky bit

5.5. ACL