1.1 问题二：yum 安装 Existing lock /var/run/yum.pid: another copy is running as pid 55911
解决方法：
[root@tbt-ovirtengine yum.repos.d]# yum install -y expect Loaded plugins: fastestmirror, versionlock Existing lock /var/run/yum.pid: another copy is running as pid 55911. Another app is currently holding the yum lock; waiting for it to exit... The other application is: yum Memory : 47 M RSS (342 MB VSZ) Started: Wed Jun 14 18:40:19 2017 - 15:33 ago State : Traced/Stopped, pid: 55911 #解决方法 Kill -9 杀进程 55911
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