Linux系统查看hosts配置与dns域名配置

方法1：
for i in `cat /etc/hosts | grep -v ^$ | grep -v "127.0.0.1" | grep -v "::1" | grep -v "#"`;do echo "$i";done && echo "" &&  cat /etc/resolv.conf  | grep -v ^$  | grep -v "#"

方法2：
（1）cat /etc/hosts | grep -v ^$ | grep -v "127.0.0.1" | grep -v "::1" | grep -v "#" | xargs

（2）cat /etc/resolv.conf  | grep -v ^$  | grep -v "#" | xargs