chmod 050 Permission Explained
Summary: chmod 050 gives the owner no access, the group read/execute, and everyone else no access.
| Class | Read (4) | Write (2) | Execute (1) | Octal |
|---|---|---|---|---|
| Owner (u) | 0 | |||
| Group (g) | 5 | |||
| Others (o) | 0 |
chmod 050 filename
chmod 050 Breakdown
| Class | Digit | Symbolic | On a file | On a directory |
|---|---|---|---|---|
| Owner (u) | 0 |
--- |
No access | Cannot list, enter, or modify |
| Group (g) | 5 |
r-x |
Read and execute | Can list and enter |
| Others (o) | 0 |
--- |
No access | Cannot list, enter, or modify |
Is chmod 050 Safe?
Low Risk
- Even the owner cannot modify this file without changing permissions first.
- Unusual: a lower class has permissions the class above it lacks.
Common Use Cases
050 is uncommon in standard Linux setups. The closest widely used permission is chmod 440.
chmod 050 Command Examples
# Apply using octal mode
chmod 050 filename
# Apply using equivalent symbolic mode
chmod u=,g=rx,o= filename
# Recursive command warning:
chmod -R 050 /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 050 {} +
# Verify permissions
stat -c '%a %A %n' filename # Linux
stat -f '%Lp %Sp %N' filename # macOS
# Example ls -l output:
----r-x--- 1 alice staff 1024 Jan 15 10:00 example.txtumask Relationship
A umask of 727 makes new directories 050. Test umask values with our interactive Umask Calculator.
Frequently Asked Questions
What does chmod 050 mean?
chmod 050 gives the owner no access, the group read/execute, and everyone else no access. In octal notation, the owner receives 0 (no access), the group receives 5 (read/execute), and others receive 0 (no access).
Is chmod 050 safe?
chmod 050 is classified as Low Risk. Even the owner cannot modify this file without changing permissions first.
What is chmod 050 in symbolic notation?
In symbolic notation, chmod 050 is represented as ---r-x---. You can apply this permission using the equivalent symbolic command "chmod u=,g=rx,o= filename".
Related Permissions
Change one bit: