chmod 043 Permission Explained
Summary: chmod 043 gives the owner no access, the group read, and everyone else write/execute.
| Class | Read (4) | Write (2) | Execute (1) | Octal |
|---|---|---|---|---|
| Owner (u) | 0 | |||
| Group (g) | 4 | |||
| Others (o) | 3 |
chmod 043 filename
chmod 043 Breakdown
| Class | Digit | Symbolic | On a file | On a directory |
|---|---|---|---|---|
| Owner (u) | 0 |
--- |
No access | Cannot list, enter, or modify |
| Group (g) | 4 |
r-- |
Read only | Can list names, but not enter |
| Others (o) | 3 |
-wx |
Write and execute | Can enter and create/delete files, but not list |
Is chmod 043 Safe?
Critical Risk
- Anyone on the system can modify or replace this file.
- 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
043 is uncommon in standard Linux setups. The closest widely used permission is chmod 440.
chmod 043 Command Examples
# Apply using octal mode
chmod 043 filename
# Apply using equivalent symbolic mode
chmod u=,g=r,o=wx filename
# Recursive command warning:
chmod -R 043 /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 043 {} +
# Verify permissions
stat -c '%a %A %n' filename # Linux
stat -f '%Lp %Sp %N' filename # macOS
# Example ls -l output:
----r---wx 1 alice staff 1024 Jan 15 10:00 example.txtumask Relationship
A umask of 734 makes new directories 043. Test umask values with our interactive Umask Calculator.
Frequently Asked Questions
What does chmod 043 mean?
chmod 043 gives the owner no access, the group read, and everyone else write/execute. In octal notation, the owner receives 0 (no access), the group receives 4 (read), and others receive 3 (write/execute).
Is chmod 043 safe?
chmod 043 is classified as Critical Risk. Anyone on the system can modify or replace this file.
What is chmod 043 in symbolic notation?
In symbolic notation, chmod 043 is represented as ---r---wx. You can apply this permission using the equivalent symbolic command "chmod u=,g=r,o=wx filename".
Related Permissions
Change one bit: