chmod WhoWhatWhich file | directory
- Who - represents identities: u,g,o,a (user, group, other, all)
- What - represents actions: +, -, = (add, remove, set exact)
- Which - represents access levels: r, w, x (read, write, execute)
4 - read - r
2 - write - w
1 - execute -x
chmod | user | group | all | filename
chmod 777 mz.log
chmod 721 mz.log
chmod 217 mz.log
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SPECIAL PERMISSION (SUID, SGID, and Sticky Bit)
SUID (Set User ID), SGID (Set Group ID), and Sticky Bit are critical attributes that extend beyond standard file permissions, providing powerful functionalities such as granting temporary privileges, controlling group access, and preserving data integrity. (Link)
chmod WhoWhatWhich file | directory
4 - SUID
2 - SGID
1 - Sticky Bit
chmod 4777 mz.log
chmod 2777 mz.log
chmod 1777 mz.log
u - user read
chmod u+s mz.log
chmod +x mz.log
chmod g+s mz.log
chmod a+t mz.log
chmod