chmod 536 Permission Explained
Summary: chmod 536 gives the owner read/execute, the group write/execute, and everyone else read/write.
| Class | Read (4) | Write (2) | Execute (1) | Octal |
|---|---|---|---|---|
| Owner (u) | 5 | |||
| Group (g) | 3 | |||
| Others (o) | 6 |
chmod 536 filename
chmod 536 Breakdown
| Class | Digit | Symbolic | On a file | On a directory |
|---|---|---|---|---|
| Owner (u) | 5 |
r-x |
Read and execute | Can list and enter |
| Group (g) | 3 |
-wx |
Write and execute | Can enter and create/delete files, but not list |
| Others (o) | 6 |
rw- |
Read and write | Can list names, cannot enter |
Is chmod 536 Safe?
Critical Risk
- Anyone on the system can modify or replace this file.
- Every member of the group can modify this file.
- Any user can read this file — never use it for secrets such as keys or .env files.
- Even the owner cannot modify this file without changing permissions first.
- Unusual: a lower class has permissions the class above it lacks.
Common Use Cases
536 is uncommon in standard Linux setups. The closest widely used permission is chmod 777.
chmod 536 Command Examples
# Apply using octal mode
chmod 536 filename
# Apply using equivalent symbolic mode
chmod u=rx,g=wx,o=rw filename
# Recursive command warning:
chmod -R 536 /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 536 {} +
# Verify permissions
stat -c '%a %A %n' filename # Linux
stat -f '%Lp %Sp %N' filename # macOS
# Example ls -l output:
-r-x-wxrw- 1 alice staff 1024 Jan 15 10:00 example.txtumask Relationship
A umask of 241 makes new directories 536. Test umask values with our interactive Umask Calculator.
Frequently Asked Questions
What does chmod 536 mean?
chmod 536 gives the owner read/execute, the group write/execute, and everyone else read/write. In octal notation, the owner receives 5 (read/execute), the group receives 3 (write/execute), and others receive 6 (read/write).
Is chmod 536 safe?
chmod 536 is classified as Critical Risk. Anyone on the system can modify or replace this file.
What is chmod 536 in symbolic notation?
In symbolic notation, chmod 536 is represented as r-x-wxrw-. You can apply this permission using the equivalent symbolic command "chmod u=rx,g=wx,o=rw filename".
Related Permissions
Change one bit: