root@localhost:/home/ubuntu# lsof -n | grep LISTEN
xkcd-webs 657                 root    4u     IPv4              15093      0t0        TCP *:http (LISTEN)
sshd      669                 root    3u     IPv4              15485      0t0        TCP *:ssh (LISTEN)
sshd      669                 root    4u     IPv6              15487      0t0        TCP *:ssh (LISTEN)
root@localhost:/home/ubuntu# exit
(amd64)ubuntu@localhost:~$ lsof -n | grep LISTEN
(amd64)ubuntu@localhost:~$