how to open port by fuser

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

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