ifconfig

enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.0.2.15  netmask 255.255.255.0  broadcast 10.0.2.255
        inet6 fe80::c364:e1b0:d52d:657f  prefixlen 64  scopeid 0x20<link>
        ether 08:00:27:77:c5:b8  txqueuelen 1000  (Ethernet)
        RX packets 164217  bytes 182814329 (182.8 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 50303  bytes 6603681 (6.6 MB)
        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 1000  (Local Loopback)
        RX packets 9297  bytes 817576 (817.5 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 9297  bytes 817576 (817.5 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

ifup enp1s0

Unknown interface enp1s0

~$: ifconfig -a
~$: ip address show

~$: ls /sys/class/net