linux无法联网使用yum提示cannot find a valid baseurl for repobase7x86_64

骑猪看日落 2022-03-19 11:25 236阅读 0赞

每次安装新镜像时会遇到物理机有网络新安装的linux中却无法与物理机通信(不能连网)，只能玩一些预装功能、命令，无法使用各种常用工具(特别是MINI版连ifconfig都没有o(╥﹏╥)o)，下面记录解决过程【提示cannot find a valid baseurl for repobase7x86\_64也是因为没有网络】。

1、首先使用ip addr查看网卡名称

[root@ ~]# ip addr
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
        link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
        link/ether 00:0c:29:22:80:e3 brd ff:ff:ff:ff:ff:ff

从上面的信息中可以看到我的网卡名称叫ens33(不同版本的系统名称存在差异)

2、修改配置文件，将配置文件中的ONBOOT=no改为ONBOOT=yes并保存

[root@ ~]# cat -n /etc/sysconfig/network-scripts/ifcfg-ens33
         1  TYPE=Ethernet
         2  PROXY_METHOD=none
         3  BROWSER_ONLY=no
         4  BOOTPROTO=dhcp
         5  DEFROUTE=yes
         6  IPV4_FAILURE_FATAL=no
         7  IPV6INIT=yes
         8  IPV6_AUTOCONF=yes
         9  IPV6_DEFROUTE=yes
        10  IPV6_FAILURE_FATAL=no
        11  IPV6_ADDR_GEN_MODE=stable-privacy
        12  NAME=ens33
        13  UUID=023bce24-ebd3-4d19-9911-e8b662axxxxx
        14  DEVICE=ens33
        15  ONBOOT=no

3、reboot重启

4、再次查看ip

[root@ ~]# ip addr
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
        link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
        inet 127.0.0.1/8 scope host lo
           valid_lft forever preferred_lft forever
        inet6 ::1/128 scope host 
           valid_lft forever preferred_lft forever
    2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
        link/ether 00:0c:29:22:80:e4 brd ff:ff:ff:ff:ff:ff
        inet 192.168.142.141/24 brd 192.168.142.255 scope global noprefixroute dynamic ens33
           valid_lft 1653sec preferred_lft 1653sec
        inet6 fe80::a0b:b3fa:fcdb:a92e/64 scope link noprefixroute 
           valid_lft forever preferred_lft forever

可以看到重启后正常联网了也能看到局域网所属ip了`192.168.142.141`。

使用yum安装ifconfig试试能不能成功联网安装：

[root@ ~]# yum search ifconfig  # 查找ifconfig所属包
    已加载插件：fastestmirror
    Loading mirror speeds from cached hostfile
     * base: mirrors.shu.edu.cn
     * extras: mirrors.zju.edu.cn
     * updates: ftp.sjtu.edu.cn
    ========================================================================== 匹配：ifconfig ==========================================================================
    net-tools.x86_64 : Basic networking tools
    [root@ ~]# yum install net-tools.x86_64  # 安装对应工具包
    已加载插件：fastestmirror
    Loading mirror speeds from cached hostfile
     * base: mirrors.shu.edu.cn
     * extras: mirrors.zju.edu.cn
     * updates: mirrors.nju.edu.cn
    正在解决依赖关系
    --> 正在检查事务
    ---> 软件包 net-tools.x86_64.0.2.0-0.24.20131004git.el7 将被 安装
    --> 解决依赖关系完成
    
    依赖关系解决
    
    ====================================================================================================================================================================
     Package                              架构                              版本                                                  源                               大小
    ====================================================================================================================================================================
    正在安装:
     net-tools                            x86_64                            2.0-0.24.20131004git.el7                              base                            306 k
    
    事务概要
    ====================================================================================================================================================================
    安装  1 软件包
    
    总下载量：306 k
    安装大小：918 k
    Is this ok [y/d/N]: y
    Downloading packages:
    net-tools-2.0-0.24.20131004git.el7.x86_64.rpm                                                                                                | 306 kB  00:00:00     
    Running transaction check
    Running transaction test
    Transaction test succeeded
    Running transaction
      正在安装    : net-tools-2.0-0.24.20131004git.el7.x86_64                                                                                                       1/1 
      验证中      : net-tools-2.0-0.24.20131004git.el7.x86_64                                                                                                       1/1 
    
    已安装:
      net-tools.x86_64 0:2.0-0.24.20131004git.el7                                                                                                                       
    
    完毕！
    
    # 测试ifconfig是否可用
    [root@ ~]# ifconfig
    ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
            inet 192.168.142.141  netmask 255.255.255.0  broadcast 192.168.142.255
            inet6 fe80::a0b:b3fa:fcdb:a93e  prefixlen 64  scopeid 0x20<link>
            ether 00:0c:29:22:80:e3  txqueuelen 1000  (Ethernet)
            RX packets 8046  bytes 10053684 (9.5 MiB)
            RX errors 0  dropped 0  overruns 0  frame 0
            TX packets 2085  bytes 202580 (197.8 KiB)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
    
    lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
            inet 127.0.0.1  netmask 255.0.0.0
            inet6 ::1  prefixlen 128  scopeid 0x10<host>
            loop  txqueuelen 1000  (Local Loopback)
            RX packets 4  bytes 352 (352.0 B)
            RX errors 0  dropped 0  overruns 0  frame 0
            TX packets 4  bytes 352 (352.0 B)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

成功安装，到此就成功解决不能联网的问题了^\_^