Editing Setuid (section)

==File modes==

The <code>setuid</code> and <code>setgid</code> bits are normally represented as the values 4 for <code>setuid</code> and 2 for <code>setgid</code> in the high-order octal digit of the file mode. For example, <code>6711</code> has both the <code>setuid</code> and <code>setgid</code> bits ({{nowrap|4 + 2 {{=}} 6}}) set, and also the file read/write/executable for the owner (7), and executable by the group (first 1) and others (second 1). Most implementations have a symbolic representation of these bits; in the previous example, this could be <code>u=rwx,go=x,ug+s</code>.

Typically, <code>chmod</code> does not have a recursive mode restricted to directories, so modifying an existing directory tree must be done manually, with a command such as {{code|find /path/to/directory -type d -exec chmod g+s '{}' '\'|sh}}.