chmod 757 Permission Explained
Summary: chmod 757 gives the owner read/write/execute, the group read/execute, and everyone else read/write/execute.
| Class | Read (4) | Write (2) | Execute (1) | Octal |
|---|---|---|---|---|
| Owner (u) | 7 | |||
| Group (g) | 5 | |||
| Others (o) | 7 |
chmod 757 filename
chmod 757 Breakdown
| Class | Digit | Symbolic | On a file | On a directory |
|---|---|---|---|---|
| Owner (u) | 7 |
rwx |
Full access | Full access: list, enter, create, delete |
| Group (g) | 5 |
r-x |
Read and execute | Can list and enter |
| Others (o) | 7 |
rwx |
Full access | Full access: list, enter, create, delete |
Is chmod 757 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
757 is uncommon in standard Linux setups. The closest widely used permission is chmod 755.
chmod 757 Command Examples
# Apply using octal mode
chmod 757 filename
# Apply using equivalent symbolic mode
chmod u=rwx,g=rx,o=rwx filename
# Recursive command warning:
chmod -R 757 /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 757 {} +
# Verify permissions
stat -c '%a %A %n' filename # Linux
stat -f '%Lp %Sp %N' filename # macOS
# Example ls -l output:
-rwxr-xrwx 1 alice staff 1024 Jan 15 10:00 example.txtumask Relationship
A umask of 020 makes new directories 757. Test umask values with our interactive Umask Calculator.
Frequently Asked Questions
What does chmod 757 mean?
chmod 757 gives the owner read/write/execute, the group read/execute, and everyone else read/write/execute. In octal notation, the owner receives 7 (read/write/execute), the group receives 5 (read/execute), and others receive 7 (read/write/execute).
Is chmod 757 safe?
chmod 757 is classified as Critical Risk. Anyone on the system can modify or replace this file.
What is chmod 757 in symbolic notation?
In symbolic notation, chmod 757 is represented as rwxr-xrwx. You can apply this permission using the equivalent symbolic command "chmod u=rwx,g=rx,o=rwx filename".
Related Permissions
Change one bit: