摘要：1.使用yum安装计划任务提示： # yum -y install vixie-cron Loaded plugins: fastestmirror, refresh-packagekit, security Existing lock /var/run/yum.pid: another copy 阅读全文

摘要：Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the s 阅读全文