CHMOD(1) — HP-UX
NAME
chmod − change mode
SYNOPSIS
chmod mode file ...
DESCRIPTION
The permissions of the named files are changed according to mode, which may be absolute or symbolic. An absolute mode is an octal number constructed from the OR of the following modes:
4000: set user ID on execution
2000: set group ID on execution
1000: sticky bit, see chmod(2)
0400: read by owner
0200: write by owner
0100: execute (search in directory) by owner
0070: read, write, execute (search) by group
0007: read, write, execute (search) by others
A symbolic mode has the form:
[ who ] op permission [ op permission ]
The who part is a combination of the letters u (for user’s permissions), g (group) and o (other). The letter a stands for ugo, the default if who is omitted.
Op can be + to add permission to the file’s mode, − to take away permission, or = to assign permission absolutely (all other bits will be reset).
Permission is any combination of the letters r (read), w (write), x (execute), s (set owner or group ID) and t (save text or sticky); u, g or o indicate that permission is to be taken from the current mode. Omitting permission is only useful with = to take away all permissions.
Multiple symbolic modes separated by commas may be given. Operations are performed in the order specified. The letter s is only useful with u or g and t only works with u.
Only the owner of a file (or the super-user) may change its mode. Only the super-user may set the sticky bit. In order to set the group ID, the group of the file must correspond to your current group ID.
EXAMPLES
The first example denies write permission to others, and the second makes a file executable:
chmod o−w file
chmod +x file
The first example below assigns read and execute permission to everybody, and sets the set-user-id bit. The second assigns read and write permission to the file owner, and read permission to everybody else:
chmod 4555 file
chmod 644 file
SEE ALSO
INTERNATIONAL SUPPORT
8-bit filenames.
Hewlett-Packard Company — Version B.1, May 11, 2021