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Understanding Special Permissions in Red Hat Linux (Simple Guide for Beginners)
- Special permissions in Red Hat Linux, such as setuid, setgid, and sticky bit, play a crucial role in enhancing system security and managing file access.
- Setuid (SUID) allows a file to run with the privileges of its owner, useful for granting specific access without full administrative power.
- An example of SUID is seen with the 'passwd' command, enabling regular users to change passwords securely.
- To set SUID on a file, use 'sudo chmod u+s filename'.
- Setgid (SGID) ensures files/folders run with group privileges, simplifying shared project collaboration.
- SGID example involves shared directories for developers, where permissions are inherited for easier teamwork.
- To apply SGID on a directory, run 'sudo chmod g+s directory'.
- The sticky bit prevents unauthorized deletion of files in shared directories, like /tmp, safeguarding important data.
- By setting the sticky bit on a folder using 'sudo chmod +t folder', users can only delete their own files.
- Special permissions usage in Linux includes safe command execution, seamless team collaboration, and file protection in public directories.
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