chmod 672 Permission Explained
Summary: chmod 672 gives the owner read/write, the group read/write/execute, and everyone else write.
| Class | Read (4) | Write (2) | Execute (1) | Octal |
|---|---|---|---|---|
| Owner (u) | 6 | |||
| Group (g) | 7 | |||
| Others (o) | 2 |
chmod 672 filename
chmod 672 Breakdown
| Class | Digit | Symbolic | On a file | On a directory |
|---|---|---|---|---|
| Owner (u) | 6 |
rw- |
Read and write | Can list names, cannot enter |
| Group (g) | 7 |
rwx |
Full access | Full access: list, enter, create, delete |
| Others (o) | 2 |
-w- |
Write only (rarely useful) | No practical effect without x |
Is chmod 672 Safe?
Critical Risk
- Anyone on the system can modify or replace this file.
- Every member of the group can modify this file.
- Unusual: a lower class has permissions the class above it lacks.
Common Use Cases
672 is uncommon in standard Linux setups. The closest widely used permission is chmod 666.
chmod 672 Command Examples
# Apply using octal mode
chmod 672 filename
# Apply using equivalent symbolic mode
chmod u=rw,g=rwx,o=w filename
# Recursive command warning:
chmod -R 672 /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 672 {} +
# Verify permissions
stat -c '%a %A %n' filename # Linux
stat -f '%Lp %Sp %N' filename # macOS
# Example ls -l output:
-rw-rwx-w- 1 alice staff 1024 Jan 15 10:00 example.txtumask Relationship
A umask of 105 makes new directories 672. Test umask values with our interactive Umask Calculator.
Frequently Asked Questions
What does chmod 672 mean?
chmod 672 gives the owner read/write, the group read/write/execute, and everyone else write. In octal notation, the owner receives 6 (read/write), the group receives 7 (read/write/execute), and others receive 2 (write).
Is chmod 672 safe?
chmod 672 is classified as Critical Risk. Anyone on the system can modify or replace this file.
What is chmod 672 in symbolic notation?
In symbolic notation, chmod 672 is represented as rw-rwx-w-. You can apply this permission using the equivalent symbolic command "chmod u=rw,g=rwx,o=w filename".
Related Permissions
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