Linux脚本获取单网卡的IPv4地址

[root@es00 ~]# ip a
1: lo:  mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens192:  mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:0c:29:04:b2:6a brd ff:ff:ff:ff:ff:ff
    inet 10.1.16.230/8 brd 10.255.255.255 scope global noprefixroute ens192
       valid_lft forever preferred_lft forever
[root@es00 ~]# 

可以看到ens192网卡对应的地址为10.1.16.230

cat <<"EOF">> getIPv4Addr.sh
#!/bin/bash
IP=`ip a | grep inet | grep -v 127.0.0.1 | grep -v inet6 | awk '{print $2}'| awk -F "/" '{print $1}'`
echo $IP
EOF
chmod +x getIPv4Addr.sh
./getIPv4Addr.sh

grep -v：排除匹配到的行
awk -F：指定字段分隔符，默认为空格