# To display all hardware details:

sudo lshw

# To list currently loaded kernel modules:

lsmod

# To list all available modules:

find /lib/modules/$(uname -r) -type f -iname "*.ko"

# To load a module:

modprobe <module>

# To remove a module:

modprobe -r <module>

# To list devices connected via pci bus:

lspci

# To debug output for pci devices (hex):

lspci -vvxxx

# To display cpu hardware stats:

cat /proc/cpuinfo

# To display memory hardware stats:

cat /proc/meminfo

# To output the kernel ring buffer:

dmesg

# Ouput kernel messages

dmesg --kernel