The access rights for any given file can be modified by using
the change mode (chmod) command.
To change the access rights
You must specify the following three elements:
The level (owner level, group level, or other
level) to modify.
The permission (read, write, or execute) to modify.
The file files to modify.
Level Options
Table below lists the level options that can be used with the
chmod command.
Option Level Description
u Owner Owner of a file
g Group Group to which the user
belongs
0 Other All other users
a All Can replace u, g, or o
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