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Linux常用命令-32：dmesg
source link: https://xugaoxiang.com/2022/06/10/linux-cmds-32-dmesg/
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dmesg 命令用于检查和控制内核的环形缓冲区。kernel会将开机信息存储在 ring buffer 中。我们一般利用 dmesg 来查看系统的开机信息。同时这些开机信息都保存在文件 /var/log/dmesg 里。
语法格式：dmesg [参数]
常用参数：
# 查看开机过程中的网卡eth0
dmesg | grep eth0
# 清空环形缓冲区中的日志
dmesg -cRecommend
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