chmod 067 Permission Explained
Summary: chmod 067 gives the owner no access, the group read/write, and everyone else read/write/execute.
| Class | Read (4) | Write (2) | Execute (1) | Octal |
|---|---|---|---|---|
| Owner (u) | 0 | |||
| Group (g) | 6 | |||
| Others (o) | 7 |
chmod 067 filename
chmod 067 Breakdown
| Class | Digit | Symbolic | On a file | On a directory |
|---|---|---|---|---|
| Owner (u) | 0 |
--- |
No access | Cannot list, enter, or modify |
| Group (g) | 6 |
rw- |
Read and write | Can list names, cannot enter |
| Others (o) | 7 |
rwx |
Full access | Full access: list, enter, create, delete |
Is chmod 067 Safe?
Critical Risk
- Anyone on the system can modify or replace this file.
- Every member of the group can modify this file.
- 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
067 is uncommon in standard Linux setups. The closest widely used permission is chmod 666.
chmod 067 Command Examples
# Apply using octal mode
chmod 067 filename
# Apply using equivalent symbolic mode
chmod u=,g=rw,o=rwx filename
# Recursive command warning:
chmod -R 067 /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 067 {} +
# Verify permissions
stat -c '%a %A %n' filename # Linux
stat -f '%Lp %Sp %N' filename # macOS
# Example ls -l output:
----rw-rwx 1 alice staff 1024 Jan 15 10:00 example.txtumask Relationship
A umask of 710 makes new directories 067. Test umask values with our interactive Umask Calculator.
Frequently Asked Questions
What does chmod 067 mean?
chmod 067 gives the owner no access, the group read/write, and everyone else read/write/execute. In octal notation, the owner receives 0 (no access), the group receives 6 (read/write), and others receive 7 (read/write/execute).
Is chmod 067 safe?
chmod 067 is classified as Critical Risk. Anyone on the system can modify or replace this file.
What is chmod 067 in symbolic notation?
In symbolic notation, chmod 067 is represented as ---rw-rwx. You can apply this permission using the equivalent symbolic command "chmod u=,g=rw,o=rwx filename".
Related Permissions
Change one bit: