如何在 bash 中获取 Centos 7 上服务器的 IP 地址

Question

Previously I used the following command in bash to find the main ip of my server

ipaddr=$(/sbin/ifconfig|grep inet|head -1|sed 's/\:/ /'|awk '{print $3}' | grep -v '127.0.0.1')

But in centos7 it no longer works since ifconfig isn't available and the command no longer works even if I install ifconfig using yum install net-tools

What is the equivalent command for centos 7

Thanks a lot

Answer 1

You can use hostname command :

ipaddr=$(hostname -I)

-i, --ip-address : Display the IP address(es) of the host. Note that this works only if the host name can be resolved.

-I, --all-ip-addresses : Display all network addresses of the host. This option enumerates all configured addresses on all network interfaces. The loopback interface and IPv6 link-local addresses are omitted. Contrary to option -i, this option does not depend on name resolution. Do not make any assumptions about the order of the output.

Answer 2

Enter the command ip addr at the console

Answer 3

Ref: https://garbagevalue.com/blog/4-simle-ways-to-check-ip-adress-in-centos-7

---

I'm using CentOS 7 and command

ip a

is enough to do the job.

Edit

Just slice out the IP address part from that test.

ip a | grep 192

Answer 4

这样的事情 - 对@maarten-vanlinthout 的回答的即兴演奏

ip  -f inet a show eth0| grep inet| awk '{ print $2}' | cut -d/ -f1

Answer 5

You can run simple commands like

curl ifconfig.co

curl ifconfig.me

wget -qO - icanhazip.com

Answer 6

Actually, when you do not want to use external sources (or cannot), I would recommend:

DEVICE=$(ls -l /sys/class/net | awk '$NF~/pci0/ { print $(NF-2); exit }')
IPADDR=$(ip -br address show dev $DEVICE | awk '{print substr($3,1,index($3,"/")-1);}')

The first line gets the name of the first network device on the PCI bus, the second one gives you its IP address.

BTW ps ... | grep ... | awk ... ps ... | grep ... | awk ... ps ... | grep ... | awk ... stinks. awk does not need grep.

Answer 7

Bit late however I use

curl -4 icanhazip.com 

returns the server Primary IP address.

Answer 8

hostname -I | awk ' {print $1}'

Answer 9

SERVER_IP="$(ip addr show ens160 | grep 'inet ' | cut -f2 | awk '{ print $2}')"

用您的接口名称替换 ens160

Answer 10

我相信获取外部服务器 IP 地址的最可靠方法是使用外部服务。

ipaddr=$(curl -s http://whatismyip.akamai.com/)

Answer 11

运行此命令以显示 ip4 和 ip6：

ifconfig eth0 | grep inet | awk '{print $2}' | cut -d/ -f1