chmod 250 Permission Explained
Summary: chmod 250 gives the owner write, the group read/execute, and everyone else no access.
| Class | Read (4) | Write (2) | Execute (1) | Octal |
|---|---|---|---|---|
| Owner (u) | 2 | |||
| Group (g) | 5 | |||
| Others (o) | 0 |
chmod 250 filename
chmod 250 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) | 0 |
--- |
No access | Cannot list, enter, or modify |
Is chmod 250 Safe?
Low Risk
- Unusual: a lower class has permissions the class above it lacks.
Common Use Cases
250 is uncommon in standard Linux setups. The closest widely used permission is chmod 750.
chmod 250 Command Examples
# Apply using octal mode
chmod 250 filename
# Apply using equivalent symbolic mode
chmod u=w,g=rx,o= filename
# Recursive command warning:
chmod -R 250 /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 250 {} +
# Verify permissions
stat -c '%a %A %n' filename # Linux
stat -f '%Lp %Sp %N' filename # macOS
# Example ls -l output:
--w-r-x--- 1 alice staff 1024 Jan 15 10:00 example.txtumask Relationship
A umask of 527 makes new directories 250. Test umask values with our interactive Umask Calculator.
Frequently Asked Questions
What does chmod 250 mean?
chmod 250 gives the owner write, the group read/execute, and everyone else no access. In octal notation, the owner receives 2 (write), the group receives 5 (read/execute), and others receive 0 (no access).
Is chmod 250 safe?
chmod 250 is classified as Low Risk. Unusual: a lower class has permissions the class above it lacks.
What is chmod 250 in symbolic notation?
In symbolic notation, chmod 250 is represented as -w-r-x---. You can apply this permission using the equivalent symbolic command "chmod u=w,g=rx,o= filename".
Related Permissions
Change one bit: