How to find out details about hardware on the Linux machine?

-i.e - how to get a full list of hardware components in command line (on a machine with no window system)

Thank you.

lspci for pci cards, lsusb for usb, lshw works on debian based distros, here's a list of ways to get other hardware specs,

If available, dmidecode comes in handy. Particularly on Dell, HP, IBM hardware, where they bother to program relevant hardware information into the various registers.

lspci is a great utility for listing the system hardware. (Anything on the PCI bus, anyway.)

cat /proc/cpuinfo - Displays CPU info

cat /proc/meminfo - Displays memory info

dmesg (or cat /var/log/dmesg) contains some info, not necessarily everything.

If you have a RedHat/CentOS system, you can use sosreport to collect a good bit of information, though I don't know if it has all the hardware info listed in it.

Those are some good places to start to find the info you're looking for.