出現(xiàn)“Could not resolve host: www.github.com; Unknown error”錯誤解決

• 一、報錯提示
• 二、測試外網百度域名訪問
• 三、查看dns配置
• 四、配置dns
• 五、測試外網訪問下載

一、報錯提示

[root@node-1 ~]# curl www.github.com curl: (6) Could not resolve host: www.github.com; Unknown error

二、測試外網百度域名訪問

[root@node-1 ~]# ping www.baidu.com ping: unknown host www.baidu.com

三、查看dns配置

[root@node-1 network-scripts]# cat ifcfg-eth0 TYPE="Ethernet" BOOTPROTO=none DEFROUTE="yes" IPV4_FAILURE_FATAL="no" IPV6INIT="yes" IPV6_AUTOCONF="yes" IPV6_DEFROUTE="yes" IPV6_FAILURE_FATAL="no" NAME="eth0" UUID="c3b26ff5-82d4-450a-8a3b-e19a19c1bd4c" DEVICE="eth0" ONBOOT="yes" IPADDR=192.168.3.11 PREFIX=24 GATEWAY=192.168.3.254 IPV6_PEERDNS=yes IPV6_PEERROUTES=yes

四、配置dns

[root@node-1 network-scripts]# nmcli con modify eth0 ipv4.dns 192.168.3.254 ipv4.method manual [root@node-1 network-scripts]# nmcli con reload [root@node-1 network-scripts]# nmcli con up eth0 Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/1)

五、測試外網訪問下載

[root@node-1 network-scripts]# ping www.baidu.com -c 4 PING www.a.shifen.com (112.80.248.76) 56(84) bytes of data. 64 bytes from 112.80.248.76: icmp_seq=1 ttl=55 time=22.1 ms 64 bytes from 112.80.248.76: icmp_seq=2 ttl=55 time=22.2 ms 64 bytes from 112.80.248.76: icmp_seq=3 ttl=55 time=22.0 ms 64 bytes from 112.80.248.76: icmp_seq=4 ttl=55 time=21.7 ms--- www.a.shifen.com ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3002ms rtt min/avg/max/mdev = 21.785/22.051/22.253/0.231 ms[root@node-1 ~]# [root@node-1 ~]# wget https://dl.360safe.com/360zip_setup.exe --2021-12-31 23:38:54-- https://dl.360safe.com/360zip_setup.exe Resolving dl.360safe.com (dl.360safe.com)... 36.32.131.66, 36.32.131.67, 118.212.132.249, ... Connecting to dl.360safe.com (dl.360safe.com)|36.32.131.66|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 14771792 (14M) [application/octet-stream] Saving to: ‘360zip_setup.exe’100%[=============================================================================================>] 14,771,792 15.5MB/s in 0.9s 2021-12-31 23:38:55 (15.5 MB/s) - ‘360zip_setup.exe’ saved [14771792/14771792]

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