You can get all info you see in the 'Settings → About' Dialogbox in terminal. For example if you want to know your Ubuntu version you can use the following command:
lsb_release -a
For identifying your wireless network cards:
lspci -nn | grep Network
For identifying your ethernet cards:
lspci -nn | grep Ethernet
For identifying your drives:
blkid
lsblk
df -h
fdisk -l
For showing file/directory information:
stat <filename/directory>
file <filename/directory>
For identifying which services are currently running:
service --status-all
systemctl --state running --type service
And this is just to name a few, there are more but that depends on what info you want to give. All text can be copied from terminal by Ctrl+Shift+C and pasted on AskUbuntu with simple Ctrl+V.