Hardware Information
Show bootup messages:
dmesg
See CPU information:
cat /proc/cpuinfo
Display free and used memory with:
free -h
List hardware configuration information:
lshw
See information about block devices:
lsblk
Show PCI devices in a tree-like diagram:
lspci -tv
Display USB devices in a tree-like diagram:
lsusb -tv
Show hardware information from the BIOS:
dmidecode
Display disk data information:
hdparm -i /dev/disk
Conduct a read-speed test on device/disk:
hdparm -tT /dev/[device]
Test for unreadable blocks on device/disk:
badblocks -s /dev/[device]