Viewing connections on a Linux port

Sometimes you might want to see the active connections on a specific port, rather than just the status of the port. This can be done using netstat:

netstat -anp | grep <your_port>

Something like this will be output (for example for port 19356):

tcp6       0      0 :::19356                :::*                    LISTEN      7354/java
tcp6       0      0 192.168.50.70:19356      192.168.50.75:50604      ESTABLISHED 7354/java
tcp6       0      0 192.168.50.70:19356      192.168.50.80:39582      ESTABLISHED 2748/java

Lines containing ESTABLISHED are active connections on the specified port. In our case, there are two of them.

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