default interface default IP default gateway

默认网关:

1. ip route show 0.0.0.0/0 | grep -oP 'via \K\S+'

    

2. f

默认网卡:

1. awk '$2==00000000{print $1}' /proc/net/route

    

2. d

默认出口IP:

1. ip route get 1.1.1.1 | grep -oP 'src \K\S+'

    

2. ip addr show dev $(awk '$2==00000000{print $1}' /proc/net/route) | awk '$1~/^inet/{sub("/.*","",$2);print $2}'