banner after login is generated from scripts in 
 /etc/update-motd.d/

# ./10-armbian-header ;./30-armbian-sysinfo 
  ___  ____  ____   ___ ___ ____     ____ ____  
 / _ \|  _ \|  _ \ / _ \_ _|  _ \   / ___|___ \ 
| | | | | | | |_) | | | | || | | | | |     __) |
| |_| | |_| |  _ <| |_| | || |_| | | |___ / __/ 
 \___/|____/|_| \_\\___/___|____/   \____|_____|
                                                

Welcome to ARMBIAN 5.65 stable Debian GNU/Linux 9 (stretch) 4.14.78-odroidxu4   
System load:   0.00 0.00 0.00  	Up time:       2:20 hours		
Memory usage:  4 % of 1996MB 	IP:            192.168.42.60
CPU temp:      38°C           	
Usage of /:    4% of 29G