chmod 270 Permission Explained
Summary: chmod 270 gives the owner write, the group read/write/execute, and everyone else no access.
| Class | Read (4) | Write (2) | Execute (1) | Octal |
|---|---|---|---|---|
| Owner (u) | 2 | |||
| Group (g) | 7 | |||
| Others (o) | 0 |
chmod 270 filename
chmod 270 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) | 7 |
rwx |
Full access | Full access: list, enter, create, delete |
| Others (o) | 0 |
--- |
No access | Cannot list, enter, or modify |
Is chmod 270 Safe?
Moderate
- Every member of the group can modify this file.
- Unusual: a lower class has permissions the class above it lacks.
Common Use Cases
270 is uncommon in standard Linux setups. The closest widely used permission is chmod 660.
chmod 270 Command Examples
# Apply using octal mode
chmod 270 filename
# Apply using equivalent symbolic mode
chmod u=w,g=rwx,o= filename
# Recursive command warning:
chmod -R 270 /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 270 {} +
# Verify permissions
stat -c '%a %A %n' filename # Linux
stat -f '%Lp %Sp %N' filename # macOS
# Example ls -l output:
--w-rwx--- 1 alice staff 1024 Jan 15 10:00 example.txtumask Relationship
A umask of 507 makes new directories 270. Test umask values with our interactive Umask Calculator.
Frequently Asked Questions
What does chmod 270 mean?
chmod 270 gives the owner write, the group read/write/execute, and everyone else no access. In octal notation, the owner receives 2 (write), the group receives 7 (read/write/execute), and others receive 0 (no access).
Is chmod 270 safe?
chmod 270 is classified as Moderate. Every member of the group can modify this file.
What is chmod 270 in symbolic notation?
In symbolic notation, chmod 270 is represented as -w-rwx---. You can apply this permission using the equivalent symbolic command "chmod u=w,g=rwx,o= filename".
Related Permissions
Change one bit: