Install the tftpd-hpa server

sudo apt install -y tftpd-hpa

(Optional) Install the tftp client

sudo apt install -y tftp

Edit the config file

sudo nano /etc/default/tftpd-hpa

# /etc/default/tftpd-hpa
TFTP_USERNAME="tftp"
TFTP_DIRECTORY="/home/tftp"
TFTP_ADDRESS="0.0.0.0:69"
TFTP_OPTIONS="--secure -4 --create"

Create the tftp folder

sudo mkdir /home/tftp
sudo chmod 777 /home/tftp
sudo chown tftp /home/tftp

To Start / Restart the TFTP service

sudo systemctl start tftpd-hpa

Using the TFTP Client

tftp IP.ADD.RE.SS
<verbose>
put source-file <dest-file>
get dest-file <source-file>
quit