Question 1)
man -k / apropos

Question 2)
hostname

Question 3)
5.15.62-1-lts

Question 4)
8

Question 5)
2.9Ghz

Question 6)
Intel

Question 7)
Little Endian

Question 8)
00:00.0 Host bridge: Intel Corporation 10th Gen Core Processor Host Bridge/DRAM Registers (rev 05)
00:02.0 VGA compatible controller: Intel Corporation CometLake-S GT2 [UHD Graphics 630] (rev 05)
00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 05)
00:12.0 Signal processing controller: Intel Corporation Comet Lake PCH Thermal Controller
00:14.0 USB controller: Intel Corporation Comet Lake USB 3.1 xHCI Host Controller
00:14.2 RAM memory: Intel Corporation Comet Lake PCH Shared SRAM
00:16.0 Communication controller: Intel Corporation Comet Lake HECI Controller
00:16.3 Serial controller: Intel Corporation Comet Lake Keyboard and Text (KT) Redirection
00:17.0 SATA controller: Intel Corporation Comet Lake SATA AHCI Controller
00:1b.0 PCI bridge: Intel Corporation Comet Lake PCI Express Root Port #21 (rev f0)
00:1f.0 ISA bridge: Intel Corporation Q470 Chipset LPC/eSPI Controller
00:1f.3 Audio device: Intel Corporation Comet Lake PCH cAVS
00:1f.4 SMBus: Intel Corporation Comet Lake PCH SMBus Controller
00:1f.5 Serial bus controller: Intel Corporation Comet Lake PCH SPI Controller
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (11) I219-LM
01:00.0 Non-Volatile memory controller: Sandisk Corp WD Blue SN550 NVMe SSD (rev 01)

lspci -v
Question 9)
lsmod

Question 10)
Intel / e1000e

Question 11)
16Go

Question 12)
256Mo