[root@yyy ~]# sar Cannot open /var/log/sa/sa19: No such file or directory 在Linux系统中,运行sar命令,发现无法执行: 原因是需要安装,安装命令如下: [root@yyy ~]# yum install sysstat Loaded plugins: fastestmirror Setting up Install Process Determining fastest mirrors base | 3.7 kB 0…