NAME
- chmod - change file mode (permissions)
SYNOPSIS
- chmod mode file ...
DESCRIPTION
-
Chmod
changes the mode (permissions) of each
file
according to
mode,
which may be an octal number or a symbolic change to the existing mode.
A mode can be numerically formed as the OR of the following octal values (a leading 8r is ignored):
- 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
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. If who is omitted, the default is a.
The op field can be: + to add permission to the file's mode, - to take away permission, = to assign permission absolutely (all other bits being reset).
The permission field is any combination of the letters r (read), w (write), x (execute), a (append only), l (exclusive access), and t (temporary, not archived).
SOURCE
- /appl/cmd/chmod.b
SEE ALSO
- chgrp(1), ls(1), sys-stat(2)
BUGS
- The interpretation of the modes is limited on some host operating systems, particularly variants of Windows.
| CHMOD(1) | Rev: Tue Jan 29 13:11:31 GMT 2008 |