简明Linux命令行笔记：dmesg

显示内核消息

dmesg [options]

 

dmesg 可以用来显示存储在内核环缓冲区中的消息

系统启动时，内核会用硬件和模块初始化的相关消息填充其环缓冲区。内核环缓冲区中的消息常常用于诊断系统问题

 

选项

-c             运行dmesg后情况内核环缓冲区

 

示例

dmesg >

[root@localhost ~]# dmesg > message[root@localhost ~]# head -4 message Initializing cgroup subsys cpusetInitializing cgroup subsys cpuLinux version 2.6.32-279.el6.i686 (mockbuild@c6b9.bsys.dev.centos.org) (gcc version 4.4.6 20120305 (Red Hat 4.4.6-4) (GCC) ) #1 SMP Fri Jun 22 10:59:55 UTC 2012KERNEL supported cpus:

将系统启动的情况重定向到某一文件

 

dmesg | grep

[root@localhost ~]# dmesg | grep eth0e1000 0000:00:03.0: eth0: (PCI:33MHz:32-bit) 08:00:27:14:99:a3e1000 0000:00:03.0: eth0: Intel(R) PRO/1000 Network Connectione1000: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX8021q: adding VLAN 0 to HW filter on device eth0eth0: no IPv6 routers present

过滤dmesg中的信息