Listing all active internet connections on Linux

Last modified on July 24, 2026 • 1 min read • 72 words
Technology   Linux   Netstat   Internet   Connections   Network  
Technology   Linux   Netstat   Internet   Connections   Network  
There are many possibilities, but perhaps the most friendly command is netstat.
Listing all active internet connections on Linux
Image by Michael Jeltsch
netstat -natp

However, it is not always easy to figure out what the actual program is that is responsible for the connection. E.g. my Brave browser shows up as

8219/renderD129 --c

In order to find out what application renderD129 is, you can use:

mjeltsch@ThinkPad:~/Documents/Informatics/jeltsch_org$ ps -fp 8219
UID          PID    PPID  C STIME TTY          TIME CMD
mjeltsch    8219    8164  0 04:51 ?        00:00:05 /opt/brave.com/brave/brave --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --render-node-override=/dev/dri/renderD129 --crashpad-handler-pid=8166 --enable-crash-reporter=660704ad-dee9-4207-8c54-988dc9068b98, --change-stack-guard-on-fork=enable --shared-files=v8_c [line truncated]
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Biochemistry/Molecular biology researcher and teacher