Which command would you use to remove a specific permission from a file?

The command used to remove a specific permission from a file is indeed "chmod." This command not only sets permissions on files and directories but also modifies existing permissions. To remove permissions, you can utilize the subtraction operator within the command, such as "chmod -x" to remove execute permission or "chmod -r" to remove read permission, depending on the context.

Using "chmod" allows fine control over who can read, write, or execute a file, making it a critical tool for managing file security in a Linux environment. Being able to modify permissions is an essential skill for system administrators and users who need to secure their files properly.

The other commands focus on different aspects of file management. "chown" changes the ownership of a file or directory, "chgrp" changes the group associated with a file or directory, and "ls -l" lists the permissions and details of files and is primarily used for viewing permissions rather than modifying them. This distinction clarifies the focus of each command's functionality, reinforcing why "chmod" is the correct choice for altering file permissions.