I would like to know the processor and memory info.
cat /proc/cpuinfo = tells you cpu info
cat /proc/meminfo = tells you memory info
lspci = tells you hardware that is attached (at least if the kernel recognizes it) on the pci bus
cat /proc/ide/hda/* = tells you info of your first ide hard-drive. There are many files under 'hda' so I put * to show that there isn't just one file.
Let us know if you need to find something specific.