how to open port by fuser code example

Example 1: how to open port by fuser

root@exampleuser-X55CR:~# fuser -k  123/tcp
123/tcp:             11543

Example 2: how to open port by fuser

root@exampleuser-X55CR:~# fuser -v -n tcp 80
root@exampleuser-X55CR:~# fuser -v -n tcp 80
                     USER        PID ACCESS COMMAND
80/tcp:              root       3846 F.... nc
root@exampleuser-X55CR:~#