chmod 070 Permission Explained
Summary: chmod 070 gives the owner no access, the group read/write/execute, and everyone else no access.
| Class | Read (4) | Write (2) | Execute (1) | Octal |
|---|---|---|---|---|
| Owner (u) | 0 | |||
| Group (g) | 7 | |||
| Others (o) | 0 |
chmod 070 filename
chmod 070 Breakdown
| Class | Digit | Symbolic | On a file | On a directory |
|---|---|---|---|---|
| Owner (u) | 0 |
--- |
No access | Cannot list, enter, or modify |
| Group (g) | 7 |
rwx |
Full access | Full access: list, enter, create, delete |
| Others (o) | 0 |
--- |
No access | Cannot list, enter, or modify |
Is chmod 070 Safe?
Moderate
- Every member of the group can modify 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
070 is uncommon in standard Linux setups. The closest widely used permission is chmod 660.
chmod 070 Command Examples
# Apply using octal mode
chmod 070 filename
# Apply using equivalent symbolic mode
chmod u=,g=rwx,o= filename
# Recursive command warning:
chmod -R 070 /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 070 {} +
# Verify permissions
stat -c '%a %A %n' filename # Linux
stat -f '%Lp %Sp %N' filename # macOS
# Example ls -l output:
----rwx--- 1 alice staff 1024 Jan 15 10:00 example.txtumask Relationship
A umask of 707 makes new directories 070. Test umask values with our interactive Umask Calculator.
Frequently Asked Questions
What does chmod 070 mean?
chmod 070 gives the owner no access, the group read/write/execute, and everyone else no access. In octal notation, the owner receives 0 (no access), the group receives 7 (read/write/execute), and others receive 0 (no access).
Is chmod 070 safe?
chmod 070 is classified as Moderate. Every member of the group can modify this file.
What is chmod 070 in symbolic notation?
In symbolic notation, chmod 070 is represented as ---rwx---. You can apply this permission using the equivalent symbolic command "chmod u=,g=rwx,o= filename".
Related Permissions
Change one bit: