Linux 配置yum源.

 Linux 配置yum源.

环境：虚拟机中安装了RedHat ，在进行安装mariadb的时候，出现如下错误。是因为yum源的问题，需要进行配置yum源。本教程是配置本地yum源。

[root@localhost yum.repos.d]# yum groups install mariadb mariadb-client -y
Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-manager
This system is not registered with an entitlement server. You can use subscription-manager to register.
There are no enabled repos.
 Run "yum repolist all" to see the repos you have.
 To enable Red Hat Subscription Management repositories:
     subscription-manager repos --enable <repo>
 To enable custom repositories:
     yum-config-manager --enable <repo>

选中虚拟机中的操作系统，鼠标：右键-->>设置

在弹出的“虚拟机设置” 窗口中，选择：CD/DVD -->>设备状态（已连接，确保打上勾即可）

在Linux的终端输入：mount 指令，可以查看到有块设备被加载进来了,见红色标注，相关信息如下：

[root@localhost yum.repos.d]# mount
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime,seclabel)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
devtmpfs on /dev type devtmpfs (rw,nosuid,seclabel,size=917580k,nr_inodes=229395,mode=755)
securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev,seclabel)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,seclabel,gid=5,mode=620,ptmxmode=000)
tmpfs on /run type tmpfs (rw,nosuid,nodev,seclabel,mode=755)
tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,seclabel,mode=755)
cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)
cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpuacct,cpu)
cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset)
cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup (rw,nosuid,nodev,noexec,relatime,net_prio,net_cls)
cgroup on /sys/fs/cgroup/pids type cgroup (rw,nosuid,nodev,noexec,relatime,pids)
configfs on /sys/kernel/config type configfs (rw,relatime)
/dev/mapper/rhel-root on / type xfs (rw,relatime,seclabel,attr2,inode64,noquota)
selinuxfs on /sys/fs/selinux type selinuxfs (rw,relatime)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=35,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=13695)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime,seclabel)
debugfs on /sys/kernel/debug type debugfs (rw,relatime)
mqueue on /dev/mqueue type mqueue (rw,relatime,seclabel)
nfsd on /proc/fs/nfsd type nfsd (rw,relatime)
/dev/sda1 on /boot type xfs (rw,relatime,seclabel,attr2,inode64,noquota)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw,relatime)
tmpfs on /run/user/1000 type tmpfs (rw,nosuid,nodev,relatime,seclabel,size=186704k,mode=700,uid=1000,gid=1000)
fusectl on /sys/fs/fuse/connections type fusectl (rw,relatime)
gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,relatime,user_id=1000,group_id=1000)
tmpfs on /run/user/0 type tmpfs (rw,nosuid,nodev,relatime,seclabel,size=186704k,mode=700)
/dev/sr0 on /run/media/hk-super/RHEL-7.4 Server.x86_64 type iso9660 (ro,nosuid,nodev,relatime,uid=1000,gid=1000,iocharset=utf8,mode=0400,dmode=0500,uhelper=udisks2)

使用root账号（切换root指令：su - root），在/mnt 目录下创建一个目录。

　　指令： mkdir /mnt/dvd

然后卸载/dev/sr0 ，然后挂在到/mnt/dvd ，进入的/mnt/dvd，就可以查看到镜像内的文件了。

相关指令如下：

　　卸载： umount /dev/sr0

　　重新挂在: mount /dev/sr0 /mnt/dvd

　　进入dvd目录: cd /mnt/dvd（此时也进入到镜像文件内了）

　　查看镜像内的文件：ls -l ( l是字母 )

　　

镜像加载到Linux之后，开始配置repo文件，相关指令如下：

　　cd /etc/yum.repos.d/

　　vim  hello.repo (名字随便起，但后缀名必须是：.repo)

　　

 　　hello.repo 文件内容如下：

[base]
name=base
baseurl=file:///mnt/dvd
enabled=1
gpgcheck=0

然后分别输入如下指令：

　　 yum clean all

　　yum makecache 

[root@localhost yum.repos.d]# yum clean all
Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-manager
This system is not registered with an entitlement server. You can use subscription-manager to register.
Cleaning repos: base
Cleaning up everything
Maybe you want: rm -rf /var/cache/yum, to also free up space taken by orphaned data from disabled or removed repos
[root@localhost yum.repos.d]# 
[root@localhost yum.repos.d]# 
[root@localhost yum.repos.d]# 
[root@localhost yum.repos.d]# yum makecache 
Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-manager
This system is not registered with an entitlement server. You can use subscription-manager to register.
base                                                                                                       | 4.1 kB  00:00:00     
(1/5): base/filelists_db                                                                                   | 3.4 MB  00:00:00     
(2/5): base/group_gz                                                                                       | 137 kB  00:00:00     
(3/5): base/other_db                                                                                       | 1.5 MB  00:00:00     
(4/5): base/productid                                                                                      | 1.6 kB  00:00:00     
(5/5): base/primary_db                                                                                     | 4.0 MB  00:00:00     
Metadata Cache Created
[root@localhost yum.repos.d]# 

上面操作反显的日志，说明yum源配置完成。

 然后再次输入安装指令：yum groups install mariadb mariadb-client -y  无报错信息，marridb安装成功。

如有问题，欢迎纠正！！！

如有转载，请标明源处：https://www.cnblogs.com/Charles-Yuan/p/9786415.html