chmod 541 Permission Explained

Notice: This is an unusual permission set: some classes have more access than the class above them. It is rarely correct in practice.

Octal

541

Symbolic

r-xr----x

Binary

101 100 001

Risk Level

Low Risk

Summary: chmod 541 gives the owner read/execute, the group read, and everyone else execute.

Class	Read (4)	Write (2)	Execute (1)	Octal
Owner (u)				5
Group (g)				4
Others (o)				1

setuid (4) setgid (2) sticky bit (1)

Octal

Symbolic

Target File / Path

-R Recursive -v Verbose

541

r-xr----x

Owner: read/execute · Group: read · Others: execute

chmod 541 filename

Low Risk Even the owner cannot modify this file without changing permissions first.

View the full chmod 541 guide →

chmod 541 Breakdown

Class	Digit	Symbolic	On a file	On a directory
Owner (u)	`5`	`r-x`	Read and execute	Can list and enter
Group (g)	`4`	`r--`	Read only	Can list names, but not enter
Others (o)	`1`	`--x`	Execute only	Can enter (cd) but not list contents

Is chmod 541 Safe?

Low Risk

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

541 is uncommon in standard Linux setups. The closest widely used permission is chmod 740.

chmod 541 Command Examples

# Apply using octal mode
chmod 541 filename

# Apply using equivalent symbolic mode
chmod u=rx,g=r,o=x filename

# Recursive command warning:
chmod -R 541 /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 541 {} +

# Verify permissions
stat -c '%a %A %n' filename    # Linux
stat -f '%Lp %Sp %N' filename   # macOS

# Example ls -l output:
-r-xr----x 1 alice staff 1024 Jan 15 10:00 example.txt

umask Relationship

A umask of 236 makes new directories 541. Test umask values with our interactive Umask Calculator.

Frequently Asked Questions

What does chmod 541 mean?

chmod 541 gives the owner read/execute, the group read, and everyone else execute. In octal notation, the owner receives 5 (read/execute), the group receives 4 (read), and others receive 1 (execute).

Is chmod 541 safe?

chmod 541 is classified as Low Risk. Even the owner cannot modify this file without changing permissions first.

What is chmod 541 in symbolic notation?

In symbolic notation, chmod 541 is represented as r-xr----x. You can apply this permission using the equivalent symbolic command "chmod u=rx,g=r,o=x filename".