Operation Manual

-R
Changes les and directories in all subdirectories
chgrp [options] groupname files
Transfers the group ownership of a given file to the group with the specied
group name. The le owner can change group ownership only if a member of both
the current and the new group.
chmod [options] mode files
Changes the access permissions.
The mode parameter has three parts: group, access, and access type.
group accepts the following characters:
u
User
g
Group
o
Others
For access, grant access with + and deny it with -.
The access type is controlled by the following options:
r
Read
w
Write
x
Execute—executing les or changing to the directory
s
Setuid bit—the application or program is started as if it were started by the
owner of the le
330 Reference