Install tftp server

Install tftpd-hpa server on Ubuntu 14.04

$ apt-get install tftpd-hpa

The TFTP server can be started by one of two ways:

1. Directly as daemon, or
2. Via inetd.

In the first case, running as daemon, the line starting with tftp in /etc/inetd.conf has to be commented (described here for openbsd-inetd or compatible):

#tftp dgram udp wait root /usr/sbin/in.tftpd /usr/sbin/in.tftpd -s /var/lib/tftpboot

and it has to be enabled in the init script's configuration /etc/default/tftpd-hpa:

# /etc/default/tftpd-hpa

RUN_DAEMON="yes"

TFTP_USERNAME="tftp"

TFTP_DIRECTORY="/var/lib/tftpboot"

TFTP_ADDRESS="[::]:69"

TFTP_OPTIONS="--secure"

In the second case, running via inetd, the line starting with tftp in /etc/inetd.conf has to be uncommented (for Debian's default inet daemon openbsd-inetd):

tftp dgram udp wait root /usr/sbin/in.tftpd /usr/sbin/in.tftpd -s /var/lib/tftpboot

And it has to be disabled in the init script's configuration /etc/default/tftpd-hpa:

RUN_DAEMON="no"

The root directory from where files can be downloaded by a client defaults to /var/lib/tftpboot. It can be changed to, e.g., to /new/tftp/root, if required.

Finally, restart the service tftpd-hpa:

# service tftpd-hpa restart