dmesg
Command Function
This command is used to display system boot and running information.
Syntax
dmesg
dmesg [-c/-C/-D/-E/-L/-U]
dmesg -s [size]
dmesg -l [level]
dmesg > [fileA]
Parameters
Table 1 Parameter description
Usage
-
This command depends on LOSCFG_SHELL_DMESG. Before using this command, select Enable Shell dmesg on menuconfig.
Debug ---> Enable a Debug Version ---> Enable Shell ---> Enable Shell dmesg
-
If no parameter is specified, all content in the buffer is printed.
-
The parameters followed by hyphens (-) are mutually exclusive.
- Before writing content to a file, ensure that the file system has been mounted.
- Disabling the serial port printing will adversely affect shell. You are advised to set up a connection using Telnet before disabling the serial port.
Example
Run dmesg> dmesg.log.
Output
Writing the content in the buffer to the dmesg.log file:
OHOS # dmesg > dmesg.log
Dmesg write log to dmesg.log success