Linux "IP" Networking

[DerMeldos]

"IP" Syntax, Options etc:

ip [ OPTIONS ] OBJECT { COMMAND | help }
OBJECT := { link | address | addrlabel | route | rule | neigh | ntable | tunnel | tuntap | maddress | mroute | mrule | monitor | xfrm | netns | l2tp | tcp_metrics | token | macsec | vrf | mptcp | ioam | stats }
OPTIONS := { -V[ersion] | -h[uman-readable] | -s[tatistics] | -d[etails] | -r[esolve] | -iec | -f[amily] { inet | inet6 | link } | -4 | -6 | -B | -0 | -l[oops] { maximum-addr-flush-attempts } | -o[neline] | -rc[vbuf] [size] | -t[imestamp] | -ts[hort] | -n[etns] name | -N[umeric] | -a[ll] | -c[olor] | -br[ief] | -j[son] | -p[retty] }

Useful Options and Explanations:

       -h, -human, -human-readable
              output statistics with human readable values followed by suffix.
       -s, -stats, -statistics
              Output more information. If the option appears twice or more, the amount of information increases.  As a rule, the information is statistics or some time values.
       -c[color][={always|auto|never}
              Configure color output. If parameter is omitted or always, color output is enabled regardless of stdout state. If parameter is auto, stdout is checked to be a terminal before enabling color output. If parameter is never, color output
              is disabled. If specified multiple times, the last one takes precedence. This flag is ignored if -json is also given.
       -br, -brief
              Print only basic information in a tabular format for better readability. This option is currently only supported by ip addr show , ip link show & ip neigh show commands.

List interfaces:

root@QBIT0718:~# ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: ens18: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
    link/ether d6:36:f9:ed:47:af brd ff:ff:ff:ff:ff:ff
    altname enp0s18
3: wg0: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1420 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/none 

Enable/Disable Interface:

ip link set dev enp0s8 up
ip link set dev enp0s8 down

Check Interface Statistics:

root@QBIT0718:~# ip -s -s -c -h link show ens18 
2: ens18: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
    link/ether d6:36:f9:ed:47:af brd ff:ff:ff:ff:ff:ff
    RX:  bytes packets errors dropped  missed   mcast           
         19.4T   10.6G      0   1.58M       0       0 
    RX errors:  length    crc   frame    fifo overrun otherhost
                     0      0       0       0       0        70 
    TX:  bytes packets errors dropped carrier collsns           
         14.8T   11.8G      0       0       0       0 
    TX errors: aborted   fifo  window heartbt transns
                     0      0       0       0       2 
    altname enp0s18

Add/Delte ip-address of interface:
(These changes are TEMPORARY until Reboot)

ip a add 10.0.0.40/24 dev enp0s8
ip a del 10.0.0.40/24 dev enp0s8