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How do I get all interface and associate IP address like following 

[root@centso ]# ifconfig
enp3s0f0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet addr:10.5.2.10  Bcast:10.5.7.255  Mask:255.255.248.0
        inet6 fe80::e611:5bff:feea:5e50  prefixlen 64  scopeid 0x20<link>
        ether e4:11:5b:ea:5e:50  txqueuelen 1000  (Ethernet)
        RX packets 638000416  bytes 763371981799 (710.9 GiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 16607280  bytes 9787019600 (9.1 GiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp3s0f1: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether e4:11:5b:ea:5e:52  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

enp4s0f0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether e4:11:5b:ea:5e:44  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

enp4s0f1: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether e4:11:5b:ea:5e:46  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 1  (Local Loopback)
        RX packets 45015  bytes 4371658 (4.1 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 45015  bytes 4371658 (4.1 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

I want output like following, also I believe there is a command ip link or something does that but didn't recall, also some machine has nic name different like enoX or ethX 

enp3s0f0: 10.5.2.10
enp3s0f1:
enp4s0f0:
enp4s0f1:
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  • 1
    Don't use ifconfig, use ip addr instead, it will show you additional IPv4 addresses that may have been associated to an interface. ifconfig only gives you the primary IPv4 address.
    – xhienne
    Commented Aug 2, 2017 at 19:12

5 Answers 5

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6

I think i found something, i am sure there must be more smart way but for now i am all set.

[root@server1 ~]# ip -o -4 addr show | awk '{print $1" " $2": "$4}'
1: lo: 127.0.0.1/8
2: eno1: 192.168.100.190/24
3: eno2: 10.5.8.33/21
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0
1

Try this:

ip addr show | awk -F '[: ]+' '
    /^[^ ]/      { iface=$2 }               # Start of section, we memorize the interface name
    $2 == "inet" { print iface ": " $3 }    # IPv4 address => print the line
'
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0
1

There is an example:

ip address show | awk '/inet / {split($2,var,"/*"); print $7,":",var[1]}'

the output should be somthing like:

 : 127.0.0.1
enp3s0f0: 10.5.2.10
enp3s0f1: .......
enp4s0f0: .......
enp4s0f1: .......
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1

This gives a report in the format you requested:

# ip -o -4 addr show | awk '{print $2": "$4}'
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2
  • Hi, what else your answer is adding to this previous answer?
    – αғsнιη
    Commented Aug 3, 2017 at 17:30
  • It's simpler and conforms to the requested report format. I've edited a previous answer but it seems it hasn't passed the review.
    – niglesias
    Commented Aug 3, 2017 at 17:32
1

This command displays the all the interfaces and their respective ip adress separated by a space in a line

ip r|grep " src "|cut -d " " -f 3,12 | xargs

reference: https://stackoverflow.com/questions/38041163/display-only-network-interface-and-ip-address-using-ifconfig-and-awk

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