错误原因：
未安装deltarpm。
解决方案：
依次执行下面两条命令，即可解决。
yum provides \'*/applydeltarpm\'
yum install deltarpm
Loaded plugins: fastestmirror
Existing lock /var/run/yum.pid: another copy is running as pid 5448.
Another app is currently holding the yum lock; waiting for it to exit...
The other application is: yum
Memory : 79 M RSS (475 MB VSZ)
Started: Tue Nov 19 21:04:11 2019 - 04:33 ago
State : Sleeping, pid: 5448
Another app is currently holding the yum lock; waiting for it to exit...
The other application is: yum
Memory : 79 M RSS (475 MB VSZ)
Started: Tue Nov 19 21:04:11 2019 - 04:35 ago
State : Sleeping, pid: 5448
Another app is currently holding the yum lock; waiting for it to exit...
The other application is: yum
Memory : 79 M RSS (475 MB VSZ)
Started: Tue Nov 19 21:04:11 2019 - 04:37 ago
State : Sleeping, pid: 5448
主要原因就是yum在自动更新 只要关掉他就可以了
解决方案：
直接输入 rm -f /var/run/yum.pid或者： /etc/init.d/yum-updatesd stop也可以等更新完了再进行安装如果执行命令出现以下问题
错误原因：
未安装deltarpm。
解决方案：
依次执行下面两条命令，即可解决。
yum provides \'*/applydeltarpm\'
yum install deltarpm
如果执行命令出现以下问题
Loaded plugins: fastestmirror
Existing lock /var/run/yum.pid: another copy is running as pid 5448.
Another app is currently holding the yum lock; waiting for it to exit...
The other application is: yum
Memory : 79 M RSS (475 MB VSZ)
Started: Tue Nov 19 21:04:11 2019 - 04:33 ago
State : Sleeping, pid: 5448
Another app is currently holding the yum lock; waiting for it to exit...
The other application is: yum
Memory : 79 M RSS (475 MB VSZ)
Started: Tue Nov 19 21:04:11 2019 - 04:35 ago
State : Sleeping, pid: 5448
Another app is currently holding the yum lock; waiting for it to exit...
The other application is: yum
Memory : 79 M RSS (475 MB VSZ)
Started: Tue Nov 19 21:04:11 2019 - 04:37 ago
State : Sleeping, pid: 5448
主要原因就是yum在自动更新 只要关掉他就可以了
解决方案：
直接输入 rm -f /var/run/yum.pid
或者： /etc/init.d/yum-updatesd stop
也可以等更新完了再进行安装
