In Linux, there are three different types of permissions that can be assigned to files and directories: read, write, and execute. These permissions can be assigned to three different classes of users: the owner of the file or directory, the group that the file or directory belongs to, and all other users. The following are the different types of file permissions in Linux: Read (r): The read permission allows a user to view the contents of a file or directory. For directories, the read permission allows a user to list the files and directories inside it. Write (w): The write permission allows a user to modify the contents of a file or directory. For directories, the write permission allows a user to create, delete, and rename files and directories inside it. Execute (x): The execute permission allows a user to execute a file or access the contents of a directory. For directories, the execute permission allows a user to access files and directories inside it. These permissions are ...