Linux 内核日志——dmesg
2015-10-24 21:41
260 查看
有时Linux系统或者系统上运行的mysqld或者其它进程,会发生一些莫名其妙的问题,比如突然挂掉了,比如突然重启等等。在软件上找不到问题所在,此时我们应该怀疑硬件或者内核的问题,此时我们就可以使用 dmesg 来查看:
直接执行:dmesg 或者 dmesg > dmg.txt 就可以获得硬件信息和内核启动时的信息。
NAME dmesg - print or control the kernel ring buffer SYNOPSIS dmesg [-c] [-r] [-n level] [-s bufsize] DESCRIPTION dmesg is used to examine or control the kernel ring buffer. The program helps users to print out their bootup messages. Instead of copying the messages by hand, the user need only: dmesg > boot.messages and mail the boot.messages file to whoever can debug their problem. OPTIONS -c Clear the ring buffer contents after printing. -r Print the raw message buffer, i.e., don’t strip the log level prefixes. -s bufsize Use a buffer of size bufsize to query the kernel ring buffer. This is 16392 by default. (The default kernel syslog buffer size was 4096 at first, 8192 since 1.3.54, 16384 since 2.1.113.) If you have set the kernel buffer to be larger than the default then this option can be used to view the entire buffer. -n level Set the level at which logging of messages is done to the console. For example, -n 1 prevents all messages, except panic messages, from appearing on the console. All levels of messages are still written to /proc/kmsg, so syslogd(8) can still be used to control exactly where kernel messages appear. When the -n option is used, dmesg will not print or clear the kernel ring buffer. When both options are used, only the last option on the command line will have an effect. SEE ALSO syslogd(8)
直接执行:dmesg 或者 dmesg > dmg.txt 就可以获得硬件信息和内核启动时的信息。
相关文章推荐
- 1.linux运维之rhel7系统安装(详细步骤)
- Linux命令--dirname
- centos下yum升级内核
- Linux教程:SSH免密码登录的方法
- linux常用命令二之权限,搜索与帮助命令
- linux常用命令一之文件处理命令
- 关 于 正 则 表 达 式 的 类 习 题
- Linux初级之总结一linux概述
- Linux_基础指令
- CentOs的开机启动过程
- linux 软件/库 命令集合
- 《rsync同步的艺术》–linux命令五分钟系列之四十二
- linux系统下的qt5安装
- Linux - Ubuntu14.04 wifi 信号 找不到
- Linux 上使用 backup-manager 进行系统备份
- Linux远程备份工具Rsync使用案例
- Linux应用环境实战13:我该如何备份系统
- 在Windows上创建同样的Linux操作环境
- kettle6.0linux安装配置
- 每天一个linux命令(20):find命令之exec