How to Troubleshoot Kernel Module Problems during Server Startup
Question
A systems administrator configured a new kernel module, but it stopped working after reboot.
Which of the following will allow the systems administrator to check for module problems during server startup?
Answers
Explanations
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A. B. C. D.C.
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/deployment_guide/sec-displaying_information_about_a_moduleThe correct answer is D. dmesg.
When a new kernel module is installed, it is typically added to a configuration file located in the /etc/modprobe.d directory. The configuration file specifies the options to be used when the module is loaded into the kernel.
When the system is rebooted, the kernel attempts to load all the configured kernel modules. If there is an error in loading a module, it may fail to load or cause the system to crash.
To troubleshoot module loading problems during server startup, the dmesg command can be used. dmesg displays the kernel ring buffer, which contains information about system events and messages generated by the kernel.
By reviewing the dmesg output during system startup, the system administrator can identify any errors or warnings related to module loading. This information can be used to diagnose and fix any problems with the kernel modules.
The other options are not relevant to troubleshooting kernel module problems during server startup. Here's a brief description of each:
A. lsmod - lists all currently loaded kernel modules. B. modprobe - loads or unloads a kernel module at runtime, but is not helpful in troubleshooting module problems during server startup. C. modinfo - displays information about a kernel module, but is not helpful in troubleshooting module problems during server startup.
