chmod 227 Permission Explained
Summary: chmod 227 gives the owner write, the group write, and everyone else read/write/execute.
| Class | Read (4) | Write (2) | Execute (1) | Octal |
|---|---|---|---|---|
| Owner (u) | 2 | |||
| Group (g) | 2 | |||
| Others (o) | 7 |
chmod 227 filename
chmod 227 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) | 2 |
-w- |
Write only (rarely useful) | No practical effect without x |
| Others (o) | 7 |
rwx |
Full access | Full access: list, enter, create, delete |
Is chmod 227 Safe?
Critical Risk
- Anyone on the system can modify or replace this file.
- Every member of the group can modify this file.
- 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
227 is uncommon in standard Linux setups. The closest widely used permission is chmod 666.
chmod 227 Command Examples
# Apply using octal mode
chmod 227 filename
# Apply using equivalent symbolic mode
chmod u=w,g=w,o=rwx filename
# Recursive command warning:
chmod -R 227 /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 227 {} +
# Verify permissions
stat -c '%a %A %n' filename # Linux
stat -f '%Lp %Sp %N' filename # macOS
# Example ls -l output:
--w--w-rwx 1 alice staff 1024 Jan 15 10:00 example.txtumask Relationship
A umask of 550 makes new directories 227. Test umask values with our interactive Umask Calculator.
Frequently Asked Questions
What does chmod 227 mean?
chmod 227 gives the owner write, the group write, and everyone else read/write/execute. In octal notation, the owner receives 2 (write), the group receives 2 (write), and others receive 7 (read/write/execute).
Is chmod 227 safe?
chmod 227 is classified as Critical Risk. Anyone on the system can modify or replace this file.
What is chmod 227 in symbolic notation?
In symbolic notation, chmod 227 is represented as -w--w-rwx. You can apply this permission using the equivalent symbolic command "chmod u=w,g=w,o=rwx filename".
Related Permissions
Change one bit: