root@test:/home/test# telnet localhost
Trying 127.0.0.1...
telnet: Unable to connect to remote host: Connection refused
root@test:/home/test# netstat -tnpa
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 127.0.0.53:53           0.0.0.0:*               LISTEN      1008/systemd-resolv
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      1445/sshd
tcp        0      0 192.168.66.131:22       192.168.66.1:49346      ESTABLISHED 1628/sshd: test [pr
tcp6       0      0 :::80                   :::*                    LISTEN      1283/apache2
tcp6       0      0 :::22                   :::*                    LISTEN      1445/sshd
root@test:/home/test#