Symbolic Notation
-rwxr-xr-x(as shown by ls -l)-rwxr-xr-x
typeownergroupother
Permission Matrix
| Read(4) | Write(2) | Execute(1) | Octal | |
|---|---|---|---|---|
| Owner | r | w | x | 7 |
| Group | r | - | x | 5 |
| Other | r | - | x | 5 |
What Does chmod 755 Mean?
Owner can read, write, execute. Group can read, execute. Others can read, execute.
$ chmod 755 filenameCommon Use Cases
Owner has full access; everyone else can read and execute. The standard for executable scripts, binaries, and web-accessible directories.
Security Notes
The standard for executables and public directories. Safe as long as the files don't contain embedded credentials.
Interactive Tool
Need to calculate a custom permission? Use the interactive permissions calculator to toggle individual bits and get instant results.
Unix Permissions Calculator