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Recipe 7.1 Using File Permissions
7.1.1 Problem
You want to
prevent other users on your machine from reading your files.
7.1.2 Solution
To protect existing files and directories:
$ chmod 600 file_name
$ chmod 700 directory_name
To protect future files and directories:
$ umask 077
7.1.3 Discussion
chmod
and umask are the
most basic file-protection commands available for Linux. Protected in
this manner, the affected files and directories are accessible only
to you and the superuser. (Not likely to be helpful against an
intruder, however.)The two chmod commands set the protection bits on
a file and directory, respectively, to limit access to their owner.
This protection is enforced by the filesystem. The
umask command informs your shell that newly
created files and directories should be accessible only to their
owner.
7.1.4 See Also
chmod(1). See your shell documentation for umask:
bash(1), tcsh(1), etc.
