chmod 247 Permission Explained
Summary: chmod 247 gives the owner write, the group read, and everyone else read/write/execute.
| Class | Read (4) | Write (2) | Execute (1) | Octal |
|---|---|---|---|---|
| Owner (u) | 2 | |||
| Group (g) | 4 | |||
| Others (o) | 7 |
chmod 247 filename
chmod 247 Breakdown
| Class | Digit | Symbolic | On a file | On a directory |
|---|---|---|---|---|
| Owner (u) | 2 |
-w- |
Write only (rarely useful) | No practical effect without x |
| Group (g) | 4 |
r-- |
Read only | Can list names, but not enter |
| Others (o) | 7 |
rwx |
Full access | Full access: list, enter, create, delete |
Is chmod 247 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.
- Unusual: a lower class has permissions the class above it lacks.
Common Use Cases
247 is uncommon in standard Linux setups. The closest widely used permission is chmod 644.
chmod 247 Command Examples
# Apply using octal mode
chmod 247 filename
# Apply using equivalent symbolic mode
chmod u=w,g=r,o=rwx filename
# Recursive command warning:
chmod -R 247 /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 247 {} +
# Verify permissions
stat -c '%a %A %n' filename # Linux
stat -f '%Lp %Sp %N' filename # macOS
# Example ls -l output:
--w-r--rwx 1 alice staff 1024 Jan 15 10:00 example.txtumask Relationship
A umask of 530 makes new directories 247. Test umask values with our interactive Umask Calculator.
Frequently Asked Questions
What does chmod 247 mean?
chmod 247 gives the owner write, the group read, and everyone else read/write/execute. In octal notation, the owner receives 2 (write), the group receives 4 (read), and others receive 7 (read/write/execute).
Is chmod 247 safe?
chmod 247 is classified as Critical Risk. Anyone on the system can modify or replace this file.
What is chmod 247 in symbolic notation?
In symbolic notation, chmod 247 is represented as -w-r--rwx. You can apply this permission using the equivalent symbolic command "chmod u=w,g=r,o=rwx filename".
Related Permissions
Change one bit: