whois
follow this guide to view other users
https://www.linuxquestions.org/linux/answers/Networking/How_to_list_all_your_USERs
Wednesday, November 29, 2017
How to view open ports on that machine
pi@raspberrypi:~ $ sudo netstat -tulpn | grep nx
tcp 0 0 127.0.0.1:7001 0.0.0.0:* LISTEN 1021/nxnode.bin
tcp 0 0 0.0.0.0:4000 0.0.0.0:* LISTEN 1001/nxd
tcp 0 0 127.0.0.1:12001 0.0.0.0:* LISTEN 1021/nxnode.bin
tcp 0 0 127.0.0.1:25001 0.0.0.0:* LISTEN 1070/nxclient.bin
tcp 0 0 127.0.0.1:21774 0.0.0.0:* LISTEN 445/nxserver.bin
tcp6 0 0 ::1:7001 :::* LISTEN 1021/nxnode.bin
tcp6 0 0 :::4000 :::* LISTEN 1001/nxd
udp 7872 0 192.168.0.123:5353 0.0.0.0:* 445/nxserver.bin
udp 0 0 0.0.0.0:5353 0.0.0.0:* 445/nxserver.bin
tcp 0 0 127.0.0.1:7001 0.0.0.0:* LISTEN 1021/nxnode.bin
tcp 0 0 0.0.0.0:4000 0.0.0.0:* LISTEN 1001/nxd
tcp 0 0 127.0.0.1:12001 0.0.0.0:* LISTEN 1021/nxnode.bin
tcp 0 0 127.0.0.1:25001 0.0.0.0:* LISTEN 1070/nxclient.bin
tcp 0 0 127.0.0.1:21774 0.0.0.0:* LISTEN 445/nxserver.bin
tcp6 0 0 ::1:7001 :::* LISTEN 1021/nxnode.bin
tcp6 0 0 :::4000 :::* LISTEN 1001/nxd
udp 7872 0 192.168.0.123:5353 0.0.0.0:* 445/nxserver.bin
udp 0 0 0.0.0.0:5353 0.0.0.0:* 445/nxserver.bin
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