【sa 命令】监控CPU 性能
sar -u 1 10
Linux 2.6.32-71.el6.i686 (rgp) 2011Äê10ÔÂ26ÈÕ _i686_ (4 CPU)
14ʱ29·Ö20Ãë CPU %user %nice %system %iowait %steal %idle
14ʱ29·Ö21Ãë all 0.58 0.00 0.58 1.17 0.00 97.67
14ʱ29·Ö22Ãë all 0.67 0.00 0.22 0.22 0.00 98.89
14ʱ29·Ö23Ãë all 0.00 0.00 0.00 0.00 0.00 100.00
14ʱ29·Ö24Ãë all 0.00 0.00 0.28 0.00 0.00 99.72
14ʱ29·Ö25Ãë all 0.24 0.00 0.24 0.71 0.00 98.81
14ʱ29·Ö26Ãë all 0.00 0.00 0.00 0.25 0.00 99.75
14ʱ29·Ö27Ãë all 0.43 0.00 0.22 0.00 0.00 99.35
14ʱ29·Ö28Ãë all 0.28 0.00 0.00 0.85 0.00 98.86
14ʱ29·Ö29Ãë all 0.47 0.00 0.23 0.00 0.00 99.30
14ʱ29·Ö30Ãë all 1.09 0.00 0.27 0.00 0.00 98.63
ƽ¾ùʱ¼ä: all 0.38 0.00 0.20 0.30 0.00 99.11
2、监控 系统进程
%>ps -ef |grep tomcat
root 812 1 1 11:58 ? 00:04:42
%> kill -9 812 :强制杀死进程号为812的进程
3、adduser:增加用户
adduser zhangsan -g groupabc -d /home/groupabc/zhangsan
4、调整时间
date -s 10:00:00 ---设置时间
clock -w ---写入系统时钟
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