Linux 取得系統開機時間

cat /proc/uptime //先取得系統開機秒數
再透C或shell過換算天,時,分,秒


cat /proc/uptime | awk -F. '{run_days=$1 / 86400;run_hour=($1 % 86400)/3600;run_minute=($1 % 3600)/60;run_second=$1 % 60;printf(\"%d day %d hour %d min %d sec\",run_days,run_hour,run_minute,run_second)}'