chmod 662 Permission Explained
Summary: chmod 662 gives the owner read/write, the group read/write, and everyone else write.
| Class | Read (4) | Write (2) | Execute (1) | Octal |
|---|---|---|---|---|
| Owner (u) | 6 | |||
| Group (g) | 6 | |||
| Others (o) | 2 |
chmod 662 filename
chmod 662 Breakdown
| Class | Digit | Symbolic | On a file | On a directory |
|---|---|---|---|---|
| Owner (u) | 6 |
rw- |
Read and write | Can list names, cannot enter |
| Group (g) | 6 |
rw- |
Read and write | Can list names, cannot enter |
| Others (o) | 2 |
-w- |
Write only (rarely useful) | No practical effect without x |
Is chmod 662 Safe?
Critical Risk
- Anyone on the system can modify or replace this file.
- Every member of the group can modify this file.
Common Use Cases
662 is uncommon in standard Linux setups. The closest widely used permission is chmod 666.
chmod 662 Command Examples
# Apply using octal mode
chmod 662 filename
# Apply using equivalent symbolic mode
chmod u=rw,g=rw,o=w filename
# Recursive command warning:
chmod -R 662 /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 662 {} +
# Verify permissions
stat -c '%a %A %n' filename # Linux
stat -f '%Lp %Sp %N' filename # macOS
# Example ls -l output:
-rw-rw--w- 1 alice staff 1024 Jan 15 10:00 example.txtumask Relationship
A umask of 115 makes new directories 662 and new files 662. Test umask values with our interactive Umask Calculator.
Frequently Asked Questions
What does chmod 662 mean?
chmod 662 gives the owner read/write, the group read/write, and everyone else write. In octal notation, the owner receives 6 (read/write), the group receives 6 (read/write), and others receive 2 (write).
Is chmod 662 safe?
chmod 662 is classified as Critical Risk. Anyone on the system can modify or replace this file.
What is chmod 662 in symbolic notation?
In symbolic notation, chmod 662 is represented as rw-rw--w-. You can apply this permission using the equivalent symbolic command "chmod u=rw,g=rw,o=w filename".
Related Permissions
Change one bit: