修改指令如下:
echo "127.0.0.1 " >> /etc/hostssed -i 's/[0-9\.]\+[ ]\+/127.0.0.2 /g' /etc/hosts
说明:
1. 先写入一条记录用于匹配(根据需要调整或直接不要)
2. 通过sed正则匹配,替换记录值
测试效果
ping -c 1 PING (127.0.0.2) 56(84) bytes of data.64 bytes from (127.0.0.2): icmp_seq=1 ttl=64 time=0.023 ms--- ping statistics ---1 packets transmitted, 1 received, 0% packet loss, time 0msrtt min/avg/max/mdev = 0.023/0.023/0.023/0.000 ms