dmesg日志时间转换脚本

1、shell脚本

#!/bin/bash
 
if [ $# -ne 1 ];then
    echo "input an dmesg time"
    exit 1
fi
 
unix_time=`echo "$(date +%s) - $(cat /proc/uptime | cut -f 1 -d' ') + ${1}" | bc`
stamp=`echo "scale=0; ${unix_time} / 1" | bc`
echo ${stamp}
date -d @${stamp} "+%Y-%m-%d %H:%M:%S"　

2、命令直接转换

dmesg_from_boot_seconds=97870.113560 && date -d "@$(echo "$(date +%s) - $(cat /proc/uptime | cut -f 1 -d' ') + ${dmesg_from_boot_seconds}" | bc )" '+%Y-%m-%d %H:%M:%S.%N'