linux how to see ports in use shell by SmokeFrog          on Mar 31 2020 Comment
1# Any of the following
2 sudo lsof -i -P -n | grep LISTEN
3 sudo netstat -tulpn | grep LISTEN
4 sudo lsof -i:22 # see a specific port such as 22
5 sudo nmap -sTU -O IP-address-Here

ubuntu check process on port shell by Alberto Peripolli          on May 19 2020 Donate Comment
1 sudo lsof -i:22

how to check list of open ports in linux typescript by Enchanting Earthworm          on May 05 2020 Comment
1 sudo lsof -i -P -n | grep LISTEN
2 sudo netstat -tulpn | grep LISTEN
3 sudo lsof -i:22 # see a specific port such as 22
4 sudo nmap -sTU -O IP-address-Here

check what ports are open linux shell by Confused Cardinal on May 31 2020 Comment

1 ## if you use linux
2 sudo ss -tulw
3
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