chmod 653 Permission Explained
Summary: chmod 653 gives the owner read/write, the group read/execute, and everyone else write/execute.
| Class | Read (4) | Write (2) | Execute (1) | Octal |
|---|---|---|---|---|
| Owner (u) | 6 | |||
| Group (g) | 5 | |||
| Others (o) | 3 |
chmod 653 filename
chmod 653 Breakdown
| Class | Digit | Symbolic | On a file | On a directory |
|---|---|---|---|---|
| Owner (u) | 6 |
rw- |
Read and write | Can list names, cannot enter |
| Group (g) | 5 |
r-x |
Read and execute | Can list and enter |
| Others (o) | 3 |
-wx |
Write and execute | Can enter and create/delete files, but not list |
Is chmod 653 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
653 is uncommon in standard Linux setups. The closest widely used permission is chmod 755.
chmod 653 Command Examples
# Apply using octal mode
chmod 653 filename
# Apply using equivalent symbolic mode
chmod u=rw,g=rx,o=wx filename
# Recursive command warning:
chmod -R 653 /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 653 {} +
# Verify permissions
stat -c '%a %A %n' filename # Linux
stat -f '%Lp %Sp %N' filename # macOS
# Example ls -l output:
-rw-r-x-wx 1 alice staff 1024 Jan 15 10:00 example.txtumask Relationship
A umask of 124 makes new directories 653. Test umask values with our interactive Umask Calculator.
Frequently Asked Questions
What does chmod 653 mean?
chmod 653 gives the owner read/write, the group read/execute, and everyone else write/execute. In octal notation, the owner receives 6 (read/write), the group receives 5 (read/execute), and others receive 3 (write/execute).
Is chmod 653 safe?
chmod 653 is classified as Critical Risk. Anyone on the system can modify or replace this file.
What is chmod 653 in symbolic notation?
In symbolic notation, chmod 653 is represented as rw-r-x-wx. You can apply this permission using the equivalent symbolic command "chmod u=rw,g=rx,o=wx filename".
Related Permissions
Change one bit: