Symbolic Notation
-rwxrwxrwx(as shown by ls -l)-rwxrwxrwx
typeownergroupother
Permission Matrix
| Read(4) | Write(2) | Execute(1) | Octal | |
|---|---|---|---|---|
| Owner | r | w | x | 7 |
| Group | r | w | x | 7 |
| Other | r | w | x | 7 |
What Does chmod 777 Mean?
Owner can read, write, execute. Group can read, write, execute. Others can read, write, execute.
$ chmod 777 filenameCommon Use Cases
Full access for everyone — read, write, and execute. A security risk in production; sometimes used temporarily during debugging.
Security Notes
Maximum risk. Any user or compromised process can read, modify, or execute the file. Never use in production — prefer 755 for directories and 644 for files.
Interactive Tool
Need to calculate a custom permission? Use the interactive permissions calculator to toggle individual bits and get instant results.
Unix Permissions Calculator