Linux Switch Machine long view __linux

Due to a power outage or power failure, you need to see Linux boot time/restart time, common commands:

1, who command to view

Who-b View the last time the system started.

Who-r View the current system run time.

2. Last reboot view Linux system history startup time

$last Reboot | Head-1 see when the last Linux system started.

3, Top, W, uptime command view up.

4, View/proc/uptime

$ date-d "$ (awk-f. ' {print} '/proc/uptime) second ago" + "%y-%m-%d%h:%m:%s" 
2016-05-18 07:20:19

5, view the log

Linux system under the system restart operation log information, are/var/log/messages directory under the store

#cat/var/log/messages |more