Cannot find a valid baseurl for

异常信息

[root@localhost ~]# yum list java*
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock error was
14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error"


 One of the configured repositories failed (Unknown),
 and yum doesn't have enough cached data to continue. At this point the only
 safe thing yum can do is fail. There are a few ways to work "fix" this:

     1. Contact the upstream for the repository and get them to fix the problem.

     2. Reconfigure the baseurl/etc. for the repository, to point to a working
        upstream. This is most often useful if you are using a newer
        distribution release than is supported by the repository (and the
        packages for the previous distribution release still work).

     3. Run the command with the repository temporarily disabled
            yum --disablerepo=<repoid> ...

     4. Disable the repository permanently, so yum won't use it by default. Yum
        will then just ignore the repository until you permanently enable it
        again or use --enablerepo for temporary usage:

            yum-config-manager --disable <repoid>
        or
            subscription-manager repos --disable=<repoid>

     5. Configure the failing repository to be skipped, if it is unavailable.
        Note that yum will try to contact the repo. when it runs most commands,
        so will have to try and fail each time (and thus. yum will be be much
        slower). If it is a very temporary problem though, this is often a nice
        compromise:

            yum-config-manager --save --setopt=<repoid>.skip_if_unavailable=true

Cannot find a valid baseurl for repo: base/7/x86_64

查看网卡信息

[root@localhost ~]# cd  /etc/sysconfig/network-scripts
[root@localhost network-scripts]# ls
ifcfg-eno1  ifcfg-lo  ifdown-bnep  ifdown-ib    ifdown-ipv6  ifdown-post  ifdown-routes  ifdown-Team      ifdown-tunnel  ifup-aliases  ifup-eth  ifup-ippp  ifup-isdn  ifup-plusb  ifup-ppp     ifup-sit   ifup-TeamPort  ifup-wireless     network-functions
ifcfg-eno2  ifdown    ifdown-eth   ifdown-ippp  ifdown-isdn  ifdown-ppp   ifdown-sit     ifdown-TeamPort  ifup           ifup-bnep     ifup-ib   ifup-ipv6  ifup-plip  ifup-post   ifup-routes  ifup-Team  ifup-tunnel    init.ipv6-global  network-functions-ipv6
[root@localhost network-scripts]# 

修改 ifcfg-eno1 添加DNS

DNS1=144.144.144.144
DNS2=8.8.8.8

vim /etc/sysconfig/network-scripts/ifcfg-eno1

TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
IPADDR=192.168.11.148
NETMASK=255.255.255.0
NM_CONTROLLED=no
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=eno1
UUID=58b167a2-cf10-4980-a682-d43d966e05fe
DEVICE=eno1
ONBOOT=yes
GATEWAY=192.168.11.1
DNS1=144.144.144.144
DNS2=8.8.8.8

完成