提示：systemctlrestartsshd rootanode6]vi/etc/ssh/sshdconfig jobforsshd.servicefailedbecausethecontrolprocessexitedwitherrorcode.See"systemctl Issshd.service"and"journalctl-xe"fordetails. 提示：/var/run/yum.pid已被锁定，PID为21463的另一个程序正在运行。Anotherappiscurrentlyholdingtheyumlock;waitingforittoexit 删除该ID:rmrf/va...