https://github.com/billw2/rpi-clone
For what I want I just use the command:
$ rpi-clone sda
This clones the current bootable SD Card to the SD Card in the USB port.
$ rpi-clone sda
This is a quick aid based on the Raspberry Pi documentation.
Some basic commands are:
sudo nginx -s reload sudo nano /etc/nginx/nginx.conf systemctl status nginx.service