yum 命令无法使用

一、yum 命令无法使用

[root@localhost ~]# yum install git 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 14: curl#7 - "Failed to connect to 2001:1b48:203::4:10: Network is unreachable" 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= 
  
    ... 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 
   
     or subscription-manager repos --disable= 
    
      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= 
     
       .skip_if_unavailable=true Cannot find a valid baseurl for repo: base/7/x86_64 
      
     
    
  

yum -help 

2、确认是yum命令的问题，看出错信息： Network is unreachable，网络的问题—》网卡没有跟随系统启动，所以设置网卡跟随系统启动

找到网卡： [root@localhost network-scripts]# ifconfig enp0s3: flags=4163 
  
    mtu 1500 inet 192.168.1.111 netmask 255.255.255.0 broadcast 192.168.1.255 inet6 fe80::aaa6:de:84ef:4350 prefixlen 64 scopeid 0x20 
   
     ether 08:00:27:90:6d:12 txqueuelen 1000 (Ethernet) RX packets 5268 bytes (499.6 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 2124 bytes (372.7 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73 
    
      mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10 
     
       loop txqueuelen 1000 (Local Loopback) RX packets 4 bytes 344 (344.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 4 bytes 344 (344.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 virbr0: flags=4099 
      
        mtu 1500 inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255 ether 52:54:00:55:79:f5 txqueuelen 1000 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 
       
      
     
    
  

3、找到网卡配置文件（ifcfg-enp0s3）之后修改参数：ONBOOT=no改为yes（如果没有配置文件，自己创建一个）

vim /etc/sysconfig/network-scripts/ifcfg-enp0s3 --------------------------------------------------------------------- TYPE=Ethernet PROXY_METHOD=none BROWSER_ONLY=no BOOTPROTO=dhcp 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=enp0s3 UUID=d4dae77b-4cbe-4234-93cd-9b0b3b7103ed DEVICE=enp0s3 ONBOOT=yes #修改此处参数将no改为yes IPADDR=192.168.1.23 PREFIX=24 GATEWAY=192.168.1.1 IPV6_PRIVACY=no ZONE=public 

4、重启网络：service network restart

5、检验：yum install 你要安装的服务