What is the method for configuring rwx permissions in Linux?

In Linux, the configuration of rwx permissions is achieved using the chmod command. The specific method is as follows:

  1. To check the permissions of a file or directory, use the ls -l command, for example:
ls -l filename
  1. Change the permissions of a file or directory using the chmod command, with the format:
chmod [权限设置] 文件或目录名称

One way to configure permissions is by using the following methods:

  1. Using numbers to represent permissions: r (read) = 4, w (write) = 2, x (execute) = 1. For example, rwx permission is 7, rw- permission is 6, r-x permission is 5.
  2. Symbols are used to represent permissions: u (owner), g (group), o (others), a (all users), and + (add permission), – (remove permission), = (set permission). For example, chmod u+x filename means to add execute permission for the owner.

For example, the command to add read-write-execute permissions for the owner of the file filename, read-write permissions for the group, and execute permissions for other users is:

chmod 751 filename
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