chmod 306 Permission Explained
Summary: chmod 306 gives the owner write/execute, the group no access, and everyone else read/write.
| Class | Read (4) | Write (2) | Execute (1) | Octal |
|---|---|---|---|---|
| Owner (u) | 3 | |||
| Group (g) | 0 | |||
| Others (o) | 6 |
chmod 306 filename
chmod 306 Breakdown
| Class | Digit | Symbolic | On a file | On a directory |
|---|---|---|---|---|
| Owner (u) | 3 |
-wx |
Write and execute | Can enter and create/delete files, but not list |
| Group (g) | 0 |
--- |
No access | Cannot list, enter, or modify |
| Others (o) | 6 |
rw- |
Read and write | Can list names, cannot enter |
Is chmod 306 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.
- Scripts need read permission to run; only compiled binaries can be executed without it.
- Unusual: a lower class has permissions the class above it lacks.
Common Use Cases
306 is uncommon in standard Linux setups. The closest widely used permission is chmod 700.
chmod 306 Command Examples
# Apply using octal mode
chmod 306 filename
# Apply using equivalent symbolic mode
chmod u=wx,g=,o=rw filename
# Recursive command warning:
chmod -R 306 /path/to/dir
# Note: -R applies the same mode to files and directories. Use find to treat them separately:
find /path/to/dir -type d -exec chmod 306 {} +
# Verify permissions
stat -c '%a %A %n' filename # Linux
stat -f '%Lp %Sp %N' filename # macOS
# Example ls -l output:
--wx---rw- 1 alice staff 1024 Jan 15 10:00 example.txtumask Relationship
A umask of 471 makes new directories 306. Test umask values with our interactive Umask Calculator.
Frequently Asked Questions
What does chmod 306 mean?
chmod 306 gives the owner write/execute, the group no access, and everyone else read/write. In octal notation, the owner receives 3 (write/execute), the group receives 0 (no access), and others receive 6 (read/write).
Is chmod 306 safe?
chmod 306 is classified as Critical Risk. Anyone on the system can modify or replace this file.
What is chmod 306 in symbolic notation?
In symbolic notation, chmod 306 is represented as -wx---rw-. You can apply this permission using the equivalent symbolic command "chmod u=wx,g=,o=rw filename".
Related Permissions
Change one bit: