Hi, in order to use the ssh services, I looked for the internet address of my computer, and the ifconfig command gave the following output that I have difficulty 'to interpret : ----------- [angelo_dev@localhost ~]$ sudo ifconfig enp4s0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 ether 60:02:92:2d:2a:1f txqueuelen 1000 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 0 (Local Loopback) RX packets 279 bytes 28310 (27.6 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 279 bytes 28310 (27.6 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 wlp3s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10.0.0.4 netmask 255.255.255.0 broadcast 10.0.0.255 inet6 fe80::d253:49ff:fe32:3254 prefixlen 64 scopeid 0x20<link> ether d0:53:49:32:32:54 txqueuelen 1000 (Ethernet) RX packets 6575 bytes 4915408 (4.6 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 5595 bytes 972283 (949.4 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 ----------- The output of ifconfig command shows two cards (enp4s0, wlp3s0) while on the computer, it is installed only one . What is 'the explanation of this fact? Also I would like to be sure to exactly get the IP address of computer .. so, please, I would ask what is the IP address to use for my purpose ( 127.0.0.1 - 10.0.0.4 -10.0.0.255) ?? Thank you Angelo