How to view system boot time and run time under Linux (RPM)

1.uptime command
Output: 16:11:40 up, 4:21, 2 users, load average:0.00, 0.01, 0.00

2. View the/proc/uptime file calculation system start time
Cat/proc/uptime
Output: 5113396.94 575949.85
The first number is the system has been running for 5,113,396,.94 seconds, using the System tool date to calculate the system boot time

Code: Select All

date -d "$(awk -F. ‘{print $1}‘ /proc/uptime) second ago" +"%Y-%m-%d %H:%M:%S"

Output: 2008-11-09 11:50:31

3. View/proc/uptime file calculation system run time

Code: Select All

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)}‘

Output: System has been running: 59 days 4:13 9 seconds

How to view system boot time and run time under Linux (RPM)