Linux system info
To find hadrware information about your linux system, few commmands report useful infromation. If several options are given, they perform similar functions.
Pretty display of main things!
sudo apt install inxi
inxi
Linux/kernel information
cat /proc/version
Linux version
cat /etc/issue
# or
lsb_release -a
CPU and processing units
lscpu
cat /proc/cpuinfo
Disk space of file systems
pydf # pretty
df -H
Check RAM
free -m
List all hardware
hwinfo --short
sudo lshw -short
List pci buses and devices connected to them
lspci