1、問題 ping: www.baudu.com: Temporary failure in name resolution

2、解決方法

在/etc/resolv.conf配置檔案末尾追加：nameserver 8.8.8.8

root@ubuntu201:/home/test# tail -n 5 /etc/resolv.conf
# operation for /etc/resolv.conf.

nameserver 127.0.0.53
options edns0 trust-ad
search .
root@ubuntu201:/home/test# echo "nameserver 8.8.8.8
 
" >> /etc/resolv.conf   ## 在配置檔案末尾追加nameserver 8.8.8.8
root@ubuntu201:/home/test# tail -n 5 /etc/resolv.conf

nameserver 127.0.0.53
options edns0 trust-ad
search .
nameserver 8.8.8.8

3、測試

root@ubuntu201:/home/test# ping www.baidu.com
PING www.a.shifen.com (39.156.66.14) 56(84) bytes of data.
64 bytes from
 
 39.156.66.14 (39.156.66.14): icmp_seq=1 ttl=128 time=14.8 ms
64 bytes from 39.156.66.14 (39.156.66.14): icmp_seq=2 ttl=128 time=14.7 ms
64 bytes from 39.156.66.14 (39.156.66.14): icmp_seq=3 ttl=128 time=14.6 ms
^C
--- www.a.shifen.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2005ms
rtt min
 
/avg/max/mdev = 14.601/14.709/14.828/0.092 ms

參考：https://blog.csdn.net/yulei_qq/article/details/104261296