Revision 1 as of 2005-11-20 02:40:41

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Understanding and Using File Permissions

In Linux and Unix everything is a file. Directories are files, files are files and devices are files. Devices are usually refered to as a node, however, they are still files. All of the files on a linux system has permissions that allow or prevent others from viewing, modifying or executing. The super user "root" has the ability to access any file on the system.

Each file has access and user restrictions.

Three types of access restrictions.

read write execute

Three types of user restrictions.

owner group other

The command to use when modifying permissions is chmod.