Linux升级命令有两个分别是yum upgrade和yum update, 这个两个命令是有区别的: yum -y update 升级所有包同时也升级软件.系统版本和系统内核 yum -y upgrade 只升级所有包和系统版本,不升级软件和系统内核 这个说法是错误的!!!两个命令是一样的! yum update: If run without any packages, update will update every currently installed package. If one…
[root@localhost ~ ]# yum -y install ntp已加载插件:fastestmirror, langpacksRepodata is over 2 weeks old. Install yum-cron? Or run: yum makecache fast/var/run/yum.pid 已被锁定,PID 为 4054 的另一个程序正在运行.Another app is currently holding the yum lock; waiting for it t…