#w
10:52:52 up 30 days, 22:04, 2 users, load average: 1.34, 1.00, 0.88
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
root tty1 - 25Mar14 30days 0.02s 0.02s -bash
root pts/0 10.1.2.11 10:44 0.00s 0.20s 0.00s w
可以看出系统运行时间,登陆用户情况等
load average 〈 0.7 正常 〉1 修复 〉4 崩溃边缘