chmod 313 Permission Explained
Summary: chmod 313 gives the owner write/execute, the group execute, and everyone else write/execute.
| Class | Read (4) | Write (2) | Execute (1) | Octal |
|---|---|---|---|---|
| Owner (u) | 3 | |||
| Group (g) | 1 | |||
| Others (o) | 3 |
chmod 313 filename
chmod 313 Breakdown
| Class | Digit | Symbolic | On a file | On a directory |
|---|---|---|---|---|
| Owner (u) | 3 |
-wx |
Write and execute | Can enter and create/delete files, but not list |
| Group (g) | 1 |
--x |
Execute only | Can enter (cd) but not list contents |
| Others (o) | 3 |
-wx |
Write and execute | Can enter and create/delete files, but not list |
Is chmod 313 Safe?
Critical Risk
- Anyone on the system can modify or replace this file.
- Scripts need read permission to run; only compiled binaries can be executed without it.
- Unusual: a lower class has permissions the class above it lacks.
Common Use Cases
313 is uncommon in standard Linux setups. The closest widely used permission is chmod 711.
chmod 313 Command Examples
# Apply using octal mode
chmod 313 filename
# Apply using equivalent symbolic mode
chmod u=wx,g=x,o=wx filename
# Recursive command warning:
chmod -R 313 /path/to/dir
# Note: -R applies the same mode to files and directories. Use find to treat them separately:
find /path/to/dir -type d -exec chmod 313 {} +
# Verify permissions
stat -c '%a %A %n' filename # Linux
stat -f '%Lp %Sp %N' filename # macOS
# Example ls -l output:
--wx--x-wx 1 alice staff 1024 Jan 15 10:00 example.txtumask Relationship
A umask of 464 makes new directories 313. Test umask values with our interactive Umask Calculator.
Frequently Asked Questions
What does chmod 313 mean?
chmod 313 gives the owner write/execute, the group execute, and everyone else write/execute. In octal notation, the owner receives 3 (write/execute), the group receives 1 (execute), and others receive 3 (write/execute).
Is chmod 313 safe?
chmod 313 is classified as Critical Risk. Anyone on the system can modify or replace this file.
What is chmod 313 in symbolic notation?
In symbolic notation, chmod 313 is represented as -wx--x-wx. You can apply this permission using the equivalent symbolic command "chmod u=wx,g=x,o=wx filename".
Related Permissions
Change one bit: