chmod 245 Permission Explained
Summary: chmod 245 gives the owner write, the group read, and everyone else read/execute.
| Class | Read (4) | Write (2) | Execute (1) | Octal |
|---|---|---|---|---|
| Owner (u) | 2 | |||
| Group (g) | 4 | |||
| Others (o) | 5 |
chmod 245 filename
chmod 245 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) | 5 |
r-x |
Read and execute | Can list and enter |
Is chmod 245 Safe?
Low Risk
- 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
245 is uncommon in standard Linux setups. The closest widely used permission is chmod 644.
chmod 245 Command Examples
# Apply using octal mode
chmod 245 filename
# Apply using equivalent symbolic mode
chmod u=w,g=r,o=rx filename
# Recursive command warning:
chmod -R 245 /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 245 {} +
# Verify permissions
stat -c '%a %A %n' filename # Linux
stat -f '%Lp %Sp %N' filename # macOS
# Example ls -l output:
--w-r--r-x 1 alice staff 1024 Jan 15 10:00 example.txtumask Relationship
A umask of 532 makes new directories 245. Test umask values with our interactive Umask Calculator.
Frequently Asked Questions
What does chmod 245 mean?
chmod 245 gives the owner write, the group read, and everyone else read/execute. In octal notation, the owner receives 2 (write), the group receives 4 (read), and others receive 5 (read/execute).
Is chmod 245 safe?
chmod 245 is classified as Low Risk. Any user can read this file — never use it for secrets such as keys or .env files.
What is chmod 245 in symbolic notation?
In symbolic notation, chmod 245 is represented as -w-r--r-x. You can apply this permission using the equivalent symbolic command "chmod u=w,g=r,o=rx filename".
Related Permissions
Change one bit: