chmod 015 Permission Explained
Summary: chmod 015 gives the owner no access, the group execute, and everyone else read/execute.
| Class | Read (4) | Write (2) | Execute (1) | Octal |
|---|---|---|---|---|
| Owner (u) | 0 | |||
| Group (g) | 1 | |||
| Others (o) | 5 |
chmod 015 filename
chmod 015 Breakdown
| Class | Digit | Symbolic | On a file | On a directory |
|---|---|---|---|---|
| Owner (u) | 0 |
--- |
No access | Cannot list, enter, or modify |
| Group (g) | 1 |
--x |
Execute only | Can enter (cd) but not list contents |
| Others (o) | 5 |
r-x |
Read and execute | Can list and enter |
Is chmod 015 Safe?
Low Risk
- Any user can read this file — never use it for secrets such as keys or .env files.
- 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
015 is uncommon in standard Linux setups. The closest widely used permission is chmod 555.
chmod 015 Command Examples
# Apply using octal mode
chmod 015 filename
# Apply using equivalent symbolic mode
chmod u=,g=x,o=rx filename
# Recursive command warning:
chmod -R 015 /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 015 {} +
# Verify permissions
stat -c '%a %A %n' filename # Linux
stat -f '%Lp %Sp %N' filename # macOS
# Example ls -l output:
------xr-x 1 alice staff 1024 Jan 15 10:00 example.txtumask Relationship
A umask of 762 makes new directories 015. Test umask values with our interactive Umask Calculator.
Frequently Asked Questions
What does chmod 015 mean?
chmod 015 gives the owner no access, the group execute, and everyone else read/execute. In octal notation, the owner receives 0 (no access), the group receives 1 (execute), and others receive 5 (read/execute).
Is chmod 015 safe?
chmod 015 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 015 in symbolic notation?
In symbolic notation, chmod 015 is represented as -----xr-x. You can apply this permission using the equivalent symbolic command "chmod u=,g=x,o=rx filename".
Related Permissions
Change one bit: