chmod 617 Permission Explained
Summary: chmod 617 gives the owner read/write, the group execute, and everyone else read/write/execute.
| Class | Read (4) | Write (2) | Execute (1) | Octal |
|---|---|---|---|---|
| Owner (u) | 6 | |||
| Group (g) | 1 | |||
| Others (o) | 7 |
chmod 617 filename
chmod 617 Breakdown
| Class | Digit | Symbolic | On a file | On a directory |
|---|---|---|---|---|
| Owner (u) | 6 |
rw- |
Read and write | Can list names, cannot enter |
| Group (g) | 1 |
--x |
Execute only | Can enter (cd) but not list contents |
| Others (o) | 7 |
rwx |
Full access | Full access: list, enter, create, delete |
Is chmod 617 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
617 is uncommon in standard Linux setups. The closest widely used permission is chmod 755.
chmod 617 Command Examples
# Apply using octal mode
chmod 617 filename
# Apply using equivalent symbolic mode
chmod u=rw,g=x,o=rwx filename
# Recursive command warning:
chmod -R 617 /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 617 {} +
# Verify permissions
stat -c '%a %A %n' filename # Linux
stat -f '%Lp %Sp %N' filename # macOS
# Example ls -l output:
-rw---xrwx 1 alice staff 1024 Jan 15 10:00 example.txtumask Relationship
A umask of 160 makes new directories 617. Test umask values with our interactive Umask Calculator.
Frequently Asked Questions
What does chmod 617 mean?
chmod 617 gives the owner read/write, the group execute, and everyone else read/write/execute. In octal notation, the owner receives 6 (read/write), the group receives 1 (execute), and others receive 7 (read/write/execute).
Is chmod 617 safe?
chmod 617 is classified as Critical Risk. Anyone on the system can modify or replace this file.
What is chmod 617 in symbolic notation?
In symbolic notation, chmod 617 is represented as rw---xrwx. You can apply this permission using the equivalent symbolic command "chmod u=rw,g=x,o=rwx filename".
Related Permissions
Change one bit: