tcp 0 0 localhost
ysql 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:ssh 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:smtp 0.0.0.0:* LISTEN
tcp 0 0 192.168.0.101:ssh 192.168.0.104:59364 ESTABLISHED
tcp6 0 0 [::]:http [::]:* LISTEN
tcp6 0 0 [::]:ssh [::]:* LISTEN
tcp6 0 0 [::]:smtp [::]:* LISTEN
tcp6 0 0 [::]:https [::]:* LISTEN
pi@raspberrypi:~ $ tcp 0 0 localhost
ysql 0.0.0.0:* LISTEN
-bash: tcp: command not found
pi@raspberrypi:~ $ tcp 0 0 0.0.0.0:ssh 0.0.0.0:* LISTEN
-bash: tcp: command not found
pi@raspberrypi:~ $ tcp 0 0 0.0.0.0:smtp 0.0.0.0:* LISTEN
-bash: tcp: command not found
pi@raspberrypi:~ $ tcp 0 0 192.168.0.101:ssh 192.168.0.104:59364 ESTABLISHED
-bash: tcp: command not found
pi@raspberrypi:~ $ tcp6 0 0 [::]:http [::]:* LISTEN
-bash: tcp6: command not found
pi@raspberrypi:~ $ tcp6 0 0 [::]:ssh [::]:* LISTEN
-bash: tcp6: command not found
pi@raspberrypi:~ $ tcp6 0 0 [::]:smtp [::]:* LISTEN
-bash: tcp6: command not found
pi@raspberrypi:~ $ tcp6 0 0 [::]:https [::]:* LISTEN
-bash: tcp6: command not found
pi@raspberrypi:~ $ tcp 0 0 localhost
ysql 0.0.0.0:* LISTEN
-bash: tcp: command not found
pi@raspberrypi:~ $ tcp 0 0 0.0.0.0:ssh 0.0.0.0:* LISTEN
-bash: tcp: command not found
pi@raspberrypi:~ $ tcp 0 0 0.0.0.0:smtp 0.0.0.0:* LISTEN
-bash: tcp: command not found
pi@raspberrypi:~ $ tcp 0 0 192.168.0.101:ssh 192.168.0.104:59364 ESTABLISHED
-bash: tcp: command not found
pi@raspberrypi:~ $ tcp6 0 0 [::]:http [::]:* LISTEN
-bash: tcp6: command not found
pi@raspberrypi:~ $ tcp6 0 0 [::]:ssh [::]:* LISTEN
-bash: tcp6: command not found
pi@raspberrypi:~ $ tcp6 0 0 [::]:smtp [::]:* LISTEN
-bash: tcp6: command not found
pi@raspberrypi:~ $ tcp6 0 0 [::]:https [::]:* LISTEN
-bash: tcp6: command not found