说明：今天在火车上测试一个CentOS7下的一个服务，要用到yum配置，但是本机没有联网，所以考虑到配置本地yum，按照之前CentOS6下的常规方法，居然发现有报错。
操作如下：
1）虚拟机下将CentOS7光盘加载到系统里面，然后挂载到本地的/localyum上
[root@localhost yum.repos.d]# mount /dev/cdrom /localyum
2）添加一个repo文件
[root@localhost ~]# cd /etc/yum.repos.d/ [root@localhost yum.repos.d]# vim CentOS7-local.repo [localyum] name=localyum baseurl=file:///localyum/ gpgcheck=0 enabled=1
3）测试安装下vsftpd软件
[root@localhost yum.repos.d]# yum -y install vsftpd
已加载插件：fastestmirror, langpacksCould not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock error was14: curl#6 - "Could not resolve host: mirrorlist.centos.org; 未知的错误" One of the configured repositories failed (未知), 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. Disable the repository, 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> 4. 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
4）由于是在局域网内，无法正常连上外网，所有重新调整了下repo文件
[root@localhost yum.repos.d]# vim CentOS7-local.repo [localyum] name=localyum baseurl=file:///localyum/ gpgcheck=0 enabled=1 yum --disablerepo=\* --enablerepo=localyum clean all #清除缓存 yum --disablerepo=\* --enablerepo=localyum makecache #缓存本地yum源包信息
5）重新安装下vsftpd软件
[root@localhost yum.repos.d]# yum -y install vsftpd
已加载插件：fastestmirror, langpacksbase | 3.6 kB 00:00:00 extras | 3.4 kB 00:00:00 localyum | 3.6 kB 00:00:00 updates | 3.4 kB 00:00:00 (1/6): localyum/group_gz | 154 kB 00:00:00 (2/6): localyum/primary_db | 2.7 MB 00:00:00 (3/6): extras/7/x86_64/primary_db | 149 kB 00:00:00 (4/6): updates/7/x86_64/primary_db | 5.7 MB 00:00:18 (5/6): base/7/x86_64/group_gz | 155 kB 00:00:21 (6/6): base/7/x86_64/primary_db | 5.3 MB 00:00:29 Determining fastest mirrors * base: mirrors.163.com * extras: mirrors.cqu.edu.cn * updates: mirrors.cqu.edu.cn正在解决依赖关系--> 正在检查事务---> 软件包 vsftpd.x86_64.0.3.0.2-11.el7_2 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: vsftpd x86_64 3.0.2-11.el7_2 updates 167 k 事务概要====================================================================================================================================================安装 1 软件包 总下载量：167 k安装大小：347 kDownloading packages:vsftpd-3.0.2-11.el7_2.x86_64.rpm | 167 kB 00:00:00 Running transaction checkRunning transaction testTransaction test succeededRunning transaction 正在安装 : vsftpd-3.0.2-11.el7_2.x86_64 1/1 验证中 : vsftpd-3.0.2-11.el7_2.x86_64 1/1 已安装: vsftpd.x86_64 0:3.0.2-11.el7_2 完毕！
6）配置光盘开机自动挂载
[root@localhost ~]# echo "/dev/cdrom /localyum iso9660 defaults 0 0">>/etc/fstab [root@localhost ~]# mount -a
本文出自 “冰冻vs西瓜” 博客，请务必保留此出处http://molewan.blog.51cto.com/287340/1826902
原文地址：http://molewan.blog.51cto.com/287340/1826902
