chmod 554 Permission Explained
Summary: chmod 554 gives the owner read/execute, the group read/execute, and everyone else read.
| Class | Read (4) | Write (2) | Execute (1) | Octal |
|---|---|---|---|---|
| Owner (u) | 5 | |||
| Group (g) | 5 | |||
| Others (o) | 4 |
chmod 554 filename
chmod 554 Breakdown
| Class | Digit | Symbolic | On a file | On a directory |
|---|---|---|---|---|
| Owner (u) | 5 |
r-x |
Read and execute | Can list and enter |
| Group (g) | 5 |
r-x |
Read and execute | Can list and enter |
| Others (o) | 4 |
r-- |
Read only | Can list names, but not enter |
Is chmod 554 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.
Common Use Cases
554 is uncommon in standard Linux setups. The closest widely used permission is chmod 555.
chmod 554 Command Examples
# Apply using octal mode
chmod 554 filename
# Apply using equivalent symbolic mode
chmod u=rx,g=rx,o=r filename
# Recursive command warning:
chmod -R 554 /path/to/dir
# Note: -R applies the same mode to files and directories. Use find to treat them separately:
find /path/to/dir -type d -exec chmod 554 {} +
# Verify permissions
stat -c '%a %A %n' filename # Linux
stat -f '%Lp %Sp %N' filename # macOS
# Example ls -l output:
-r-xr-xr-- 1 alice staff 1024 Jan 15 10:00 example.txtumask Relationship
A umask of 223 makes new directories 554. Test umask values with our interactive Umask Calculator.
Frequently Asked Questions
What does chmod 554 mean?
chmod 554 gives the owner read/execute, the group read/execute, and everyone else read. In octal notation, the owner receives 5 (read/execute), the group receives 5 (read/execute), and others receive 4 (read).
Is chmod 554 safe?
chmod 554 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 554 in symbolic notation?
In symbolic notation, chmod 554 is represented as r-xr-xr--. You can apply this permission using the equivalent symbolic command "chmod u=rx,g=rx,o=r filename".
Related Permissions
Change one bit: