centos 查看上一次重启时间

#who

#who -b

#last reboot

#cat /proc/uptime| awk -F. \'{run_days=$1 / 86400;run_hour=($1 % 86400)/3600;run_minute=($1 % 3600)/60;run_second=$1 % 60;printf("系统已运行：%d天%d时%d分%d秒",run_days,run_hour,run_minute,run_second)}\'