RHEL Linux Red Hat System Administration 2025 – 400 Free Practice Questions to Pass the Exam

The 'chmod' command in RHEL is used to change the file permissions of a file or directory. This command allows users to specify who can read, write, or execute a file. By using a combination of letters (r, w, x) or octal numbers (like 755 or 644), the user can set specific permissions for the file owner, group, and others.

Understanding file permissions is crucial in a Linux environment, as they control access to resources. For instance, providing execute permission allows a script to be run, while read permission allows a user to view the contents of a file. This command is an essential tool for managing security and user access in a multi-user environment.

The other options involve different functionalities that do not relate to the 'chmod' command. Changing file owner pertains to the 'chown' command, altering file content can be accomplished with various text editors or commands like 'echo' or 'cat', and changing file path relates to file movement operations which would use commands like 'mv'. Each of these operations serves a distinct function that is separate from modifying file permissions.