chmod 613 Permission Explained
Summary: chmod 613 gives the owner read/write, the group execute, and everyone else write/execute.
| Class | Read (4) | Write (2) | Execute (1) | Octal |
|---|---|---|---|---|
| Owner (u) | 6 | |||
| Group (g) | 1 | |||
| Others (o) | 3 |
chmod 613 filename
chmod 613 Breakdown
| Class | Digit | Symbolic | On a file | On a directory |
|---|---|---|---|---|
| Owner (u) | 6 |
rw- |
Read and write | Can list names, cannot enter |
| 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 613 Safe?
Critical Risk
- Anyone on the system can modify or replace this file.
- Unusual: a lower class has permissions the class above it lacks.
Common Use Cases
613 is uncommon in standard Linux setups. The closest widely used permission is chmod 711.
chmod 613 Command Examples
# Apply using octal mode
chmod 613 filename
# Apply using equivalent symbolic mode
chmod u=rw,g=x,o=wx filename
# Recursive command warning:
chmod -R 613 /path/to/dir
# Note: -R applies the same mode to files and directories. Use find to treat them separately:
find /path/to/dir -type f -exec chmod 613 {} +
# Verify permissions
stat -c '%a %A %n' filename # Linux
stat -f '%Lp %Sp %N' filename # macOS
# Example ls -l output:
-rw---x-wx 1 alice staff 1024 Jan 15 10:00 example.txtumask Relationship
A umask of 164 makes new directories 613. Test umask values with our interactive Umask Calculator.
Frequently Asked Questions
What does chmod 613 mean?
chmod 613 gives the owner read/write, the group execute, and everyone else write/execute. In octal notation, the owner receives 6 (read/write), the group receives 1 (execute), and others receive 3 (write/execute).
Is chmod 613 safe?
chmod 613 is classified as Critical Risk. Anyone on the system can modify or replace this file.
What is chmod 613 in symbolic notation?
In symbolic notation, chmod 613 is represented as rw---x-wx. You can apply this permission using the equivalent symbolic command "chmod u=rw,g=x,o=wx filename".
Related Permissions
Change one bit: