The “ip addr show” method

We will parse this output:

eaydin@eaydin:~$ ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:22:15:f6:55:e6 brd ff:ff:ff:ff:ff:ff
    inet 192.168.16.30/24 brd 192.168.16.255 scope global eth0
    inet6 fe80::222:15ff:fef6:55e6/64 scope link 
       valid_lft forever preferred_lft forever

IP ADDRESS :

ip addr show |grep -w inet |grep -v 127.0.0.1|awk '{ print $2}'| cut -d "/" -f 1

Output : 192.168.16.30

PREFIX (Netmask in CIDR Notation) :

ip addr show |grep -w inet |grep -v 127.0.0.1|awk '{ print $2}'| cut -d "/" -f 2

Output : 24

Broadcast IP :

ip addr show |grep -w inet |grep -v 127.0.0.1|awk '{ print $4}'

Output : 192.168.16.255

Device name :

ip addr show | awk 'FNR==7 {print $2}' | tr -d :

Output : eth0

IPv6 ADDRESS :

ip addr show |grep -w inet6 |grep -v ::1|awk '{ print $2}'| cut -d "/" -f 1

Output : fe80::222:15ff:fef6:55e6

IPv6 PREFIX (Netmask in CIDR Notation) :

ip addr show |grep -w inet6 |grep -v ::1|awk 'FNR==1 { print $2}'| cut -d "/" -f 2

Output : 64

Ethernet Card MAC Address :

ip addr show | grep -w ether | awk '{ print $2 }'

Output : 00:22:15:f6:55:e6

The “ifconfig” method

This time we’ll parse this output:

eaydin@eaydin:~$ ifconfig
eth0      Link encap:Ethernet  HWaddr 00:22:15:f6:55:e6  
          inet addr:192.168.16.30  Bcast:192.168.16.255  Mask:255.255.255.0
          inet6 addr: fe80::222:15ff:fef6:55e6/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:626934 errors:0 dropped:0 overruns:0 frame:0
          TX packets:363506 errors:0 dropped:0 overruns:0 carrier:2
          collisions:0 txqueuelen:1000 
          RX bytes:284072710 (284.0 MB)  TX bytes:56413838 (56.4 MB)
          Interrupt:45 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:43339 errors:0 dropped:0 overruns:0 frame:0
          TX packets:43339 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:4834972 (4.8 MB)  TX bytes:4834972 (4.8 MB)

IP ADDRESS :

ifconfig | grep -w inet |grep -v 127.0.0.1| awk '{print $2}' | cut -d ":" -f 2

Output : 192.168.16.30

Broadcast IP :

ifconfig | grep -w inet |grep -v 127.0.0.1| awk '{print $6}' | cut -d ":" -f 2

Output : 192.168.16.255

Netmask :

ifconfig | grep -w inet |grep -v 127.0.0.1| awk '{print $4}' | cut -d ":" -f 2

Output : 255.255.255.0

Device name :

ifconfig | awk 'FNR==1 { print $1 }' | tr --d :

Output : eth0

IPv6 ADDRESS :

ifconfig | grep -w inet6 | grep -v ::1| awk '{ print $2 }'

Output : fe80::222:15ff:fef6:55e6

IPv6 PREFIX (Netmask in CIDR Notation) :

ifconfig | grep -w inet6 | awk 'FNR == 2 { print $4 }'

Output : 64

Ethernet Card MAC Address :

ifconfig | grep -w ether | awk '{ print $2 }'

Output : 00:22:15:f6:55:e6

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