yun install lrzsz安装不了原因，更新centos6yun源

方法来自：https://www.cnblogs.com/qiuzhendezhen/p/16107983.html

第一步：输入指令：vi /etc/yum.repos.d/CentOS-Base.repo文件，将文件内容替换成如下内容：

[base]

name=CentOS-6.10

baseurl=http://mirrors.aliyun.com/centos-vault/6.10/os/$basearch/

gpgcheck=1

enabled=1

gpgkey=http://vault.centos.org/RPM-GPG-KEY-CentOS-6

 

#released updates

[updates]

name=CentOS-6.10

baseurl=http://mirrors.aliyun.com/centos-vault/6.10/updates/$basearch/

gpgcheck=1

enabled=1

gpgkey=http://vault.centos.org/RPM-GPG-KEY-CentOS-6

 

#additional packages that may be useful

[extras]

name=CentOS-6.10

baseurl=http://mirrors.aliyun.com/centos-vault/6.10/extras/$basearch/

gpgcheck=1

enabled=1

gpgkey=http://vault.centos.org/RPM-GPG-KEY-CentOS-6

2、分别执行一下命令、刷新缓存
yum clean all
yum makecache
yum update
yum install lrzsz


3、这时候通过yum命令安装lrzsz或者mysql会报如下错：
rpmts_HdrFromFdno: Header V3 RSA/SHA256 Signature, key ID c105b9de: NOKEY Retrieving key from http://vault.centos.org/RPM-GPG-KEY-CentOS-6

4、解决第三步报错的方法、执行一下命令即可：
rpm --import /etc/pki/rpm-gpg/RPM*

5、执行第四步成功后在执行yum命令安装lrzsz或者mysql即可