I’m a midwit so for me it’s inxi.
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There’s also dmidecode command that can parse BIOS info in shell it’s useful
dmesg is always fun though nowadays it requires root or sudo
other hot utilities that start with ls: lsblk lspci lsusb lsmod
or you can just cat random /proc or /sys files
I suppose if you want to read some logs and are running systemd you can journalctl
honorary mentions to hdparm, smartmontools, lm-sensors