CHMOD(1) CHMOD(1) 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 (exclu- sive 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.