chmod 006 Permission Explained
Summary: chmod 006 gives the owner no access, the group no access, and everyone else read/write.
| Class | Read (4) | Write (2) | Execute (1) | Octal |
|---|---|---|---|---|
| Owner (u) | 0 | |||
| Group (g) | 0 | |||
| Others (o) | 6 |
chmod 006 filename
chmod 006 Breakdown
| Class | Digit | Symbolic | On a file | On a directory |
|---|---|---|---|---|
| Owner (u) | 0 |
--- |
No access | Cannot list, enter, or modify |
| Group (g) | 0 |
--- |
No access | Cannot list, enter, or modify |
| Others (o) | 6 |
rw- |
Read and write | Can list names, cannot enter |
Is chmod 006 Safe?
Critical Risk
- Anyone on the system can modify or replace 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
006 is uncommon in standard Linux setups. The closest widely used permission is chmod 000.
chmod 006 Command Examples
# Apply using octal mode
chmod 006 filename
# Apply using equivalent symbolic mode
chmod u=,g=,o=rw filename
# Recursive command warning:
chmod -R 006 /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 006 {} +
# Verify permissions
stat -c '%a %A %n' filename # Linux
stat -f '%Lp %Sp %N' filename # macOS
# Example ls -l output:
-------rw- 1 alice staff 1024 Jan 15 10:00 example.txtumask Relationship
A umask of 771 makes new directories 006 and new files 006. Test umask values with our interactive Umask Calculator.
Frequently Asked Questions
What does chmod 006 mean?
chmod 006 gives the owner no access, the group no access, and everyone else read/write. In octal notation, the owner receives 0 (no access), the group receives 0 (no access), and others receive 6 (read/write).
Is chmod 006 safe?
chmod 006 is classified as Critical Risk. Anyone on the system can modify or replace this file.
What is chmod 006 in symbolic notation?
In symbolic notation, chmod 006 is represented as ------rw-. You can apply this permission using the equivalent symbolic command "chmod u=,g=,o=rw filename".
Related Permissions
Change one bit: