chmod 351 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

351

Symbolic

-wxr-x--x

Binary

011 101 001

Risk Level

Low Risk

Summary: chmod 351 gives the owner write/execute, the group read/execute, and everyone else execute.

Class	Read (4)	Write (2)	Execute (1)	Octal
Owner (u)				3
Group (g)				5
Others (o)				1

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

Octal

Symbolic

Target File / Path

-R Recursive -v Verbose

351

-wxr-x--x

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

chmod 351 filename

Low Risk Scripts need read permission to run; only compiled binaries can be executed without it.

View the full chmod 351 guide →

chmod 351 Breakdown

Class	Digit	Symbolic	On a file	On a directory
Owner (u)	`3`	`-wx`	Write and execute	Can enter and create/delete files, but not list
Group (g)	`5`	`r-x`	Read and execute	Can list and enter
Others (o)	`1`	`--x`	Execute only	Can enter (cd) but not list contents

Is chmod 351 Safe?

Low Risk

Scripts need read permission to run; only compiled binaries can be executed without it.
Unusual: a lower class has permissions the class above it lacks.

Common Use Cases

351 is uncommon in standard Linux setups. The closest widely used permission is chmod 755.

chmod 351 Command Examples

# Apply using octal mode
chmod 351 filename

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

# Recursive command warning:
chmod -R 351 /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 351 {} +

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

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

umask Relationship

A umask of 426 makes new directories 351. Test umask values with our interactive Umask Calculator.

Frequently Asked Questions

What does chmod 351 mean?

chmod 351 gives the owner write/execute, the group read/execute, and everyone else execute. In octal notation, the owner receives 3 (write/execute), the group receives 5 (read/execute), and others receive 1 (execute).

Is chmod 351 safe?

chmod 351 is classified as Low Risk. Scripts need read permission to run; only compiled binaries can be executed without it.

What is chmod 351 in symbolic notation?

In symbolic notation, chmod 351 is represented as -wxr-x--x. You can apply this permission using the equivalent symbolic command "chmod u=wx,g=rx,o=x filename".