chmod 254 Permission Explained
Summary: chmod 254 gives the owner write, the group read/execute, and everyone else read.
| Class | Read (4) | Write (2) | Execute (1) | Octal |
|---|---|---|---|---|
| Owner (u) | 2 | |||
| Group (g) | 5 | |||
| Others (o) | 4 |
chmod 254 filename
chmod 254 Breakdown
| Class | Digit | Symbolic | On a file | On a directory |
|---|---|---|---|---|
| Owner (u) | 2 |
-w- |
Write only (rarely useful) | No practical effect without x |
| Group (g) | 5 |
r-x |
Read and execute | Can list and enter |
| Others (o) | 4 |
r-- |
Read only | Can list names, but not enter |
Is chmod 254 Safe?
Low Risk
- Any user can read this file — never use it for secrets such as keys or .env files.
- Unusual: a lower class has permissions the class above it lacks.
Common Use Cases
254 is uncommon in standard Linux setups. The closest widely used permission is chmod 644.
chmod 254 Command Examples
# Apply using octal mode
chmod 254 filename
# Apply using equivalent symbolic mode
chmod u=w,g=rx,o=r filename
# Recursive command warning:
chmod -R 254 /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 254 {} +
# Verify permissions
stat -c '%a %A %n' filename # Linux
stat -f '%Lp %Sp %N' filename # macOS
# Example ls -l output:
--w-r-xr-- 1 alice staff 1024 Jan 15 10:00 example.txtumask Relationship
A umask of 523 makes new directories 254. Test umask values with our interactive Umask Calculator.
Frequently Asked Questions
What does chmod 254 mean?
chmod 254 gives the owner write, the group read/execute, and everyone else read. In octal notation, the owner receives 2 (write), the group receives 5 (read/execute), and others receive 4 (read).
Is chmod 254 safe?
chmod 254 is classified as Low Risk. Any user can read this file — never use it for secrets such as keys or .env files.
What is chmod 254 in symbolic notation?
In symbolic notation, chmod 254 is represented as -w-r-xr--. You can apply this permission using the equivalent symbolic command "chmod u=w,g=rx,o=r filename".
Related Permissions
Change one bit: