yum提示Another app is currently holding the yum lock; waiting for it to exit...问题的解决

Loaded plugins: fastestmirror, langpacks
Existing lock /var/run/yum.pid: another copy is running as pid 9207.
Another app is currently holding the yum lock; waiting for it to exit...
  The other application is: PackageKit
    Memory : 103 M RSS (525 MB VSZ)
    Started: Fri Mar  1 22:13:08 2019 - 02:49 ago
    State  : Sleeping, pid: 9207

可以看出有进程正在运行，可能是yum在自动升级

先尝试使用kill -9 看能不能杀死

如果干不掉的话就使用下面的命令，强制杀死进程

#rm -f /var/run/yum.pid