`ss` command

Show open ports and network connections.

Networking
Package iproute2
7 options · 5 examples

Read the full guide Jump to examples All commands

On this page

Syntax
Common options
Examples
Tips
Guides
Related commands

Syntax

ss [options] [filter]

Provided by the iproute2 package. Run man ss for the full manual.

Common options

Option	What it does
`-t`	TCP
`-u`	UDP
`-l`	Only listening sockets
`-n`	Numeric ports and addresses
`-p`	Show the process
`-a`	All sockets
`-s`	Summary

Examples

Listening TCP and UDP ports with processes
```
sudo ss -tulpn
```
Listening TCP ports only
```
ss -tln
```
What is using port 80
```
sudo ss -tlpn 'sport = :80'
```
Established connections
```
ss -tn state established
```
Connection summary
```
ss -s
```

Tips

ss replaces netstat; netstat -tulpn is the old equivalent.

ss guides

How to Install netstat Command in Linux Linux Commands · Updated Apr 2025
A Comparison Between ss vs netstat Commands Linux Commands · Updated Apr 2025
bash: netstat: command not found – Ubuntu/Debian Shell Scripting · Updated Apr 2025

← All Linux commands · Suggest a fix