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modinfo <module_name|module.ko> provides information about a module (author, description, license, kernel version it was compiled for, list of accepted parameters, etc.).insmod <module.ko> loads a module.modprobe <module_name> loads a module and any required dependencies.lsmod lists the modules currently loaded.rmmod <module_name> unloads a module. This operation is only possible if the module is not currently in use.modprobe -r <module_name> also unloads a module and all of its dependencies that are not being used.
pr_* functions (ring buffer of dmesg)dev_* functions (with a pointer to device)- Debugfs (
CONFIG_DEBUG_FS and mounting /sys/kernel/debug
kgdb with serialJTAG/SWD on the processor- QEMU (and
gdb)
