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如何修改arm Linux中Printk的等级

2025-03-17 20:51:42

推荐回答（2个）

回答1：

1、查看当前控制台的打印级别
cat /proc/sys/kernel/printk
4 4 1 7
其中第一个“4”表示内核打印函数printk的打印级别，只有级别比他高的信息才能在控制台上打印出来，既 0－3级别的信息
2、修改打印
echo "新的打印级别 4 1 7" >/proc/sys/kernel/printk
3、不够打印级别的信息会被写到日志中可通过dmesg 命令来查看
4、printk的打印级别

#define KERN_EMERG "<0>" /* system is unusable */
#define KERN_ALERT "<1>" /* action must be taken immediately */
#define KERN_CRIT "<2>" /* critical conditions */
#define KERN_ERR "<3>" /* error conditions */
#define KERN_WARNING "<4>" /* warning conditions */
#define KERN_NOTICE "<5>" /* normal but significant condition */
#define KERN_INFO "<6>" /* informational */
#define KERN_DEBUG "<7>" /* debug-level messages */
5、printk函数的使用
printk(打印级别 “要打印的信息”)
打印级别既上面定义的几个宏

回答2：

Embedsky是你的主机名，所以只需要修改主机名就可以达到目的。没有sudo命令那么su命令总是有的。su命令可以直接获取管理员权限，而不是sudo仅获得一次。

（望楼主采纳哦）

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