To install ttylinkd;

To create binary:
	make

To install binary and man pages:
	make install

Then edit the file /etc/ax25/ttylinkd.conf to change the sysops login to
whoever you want.

That should hopefully be it, although you may want to do/check the
following;

  * Ensure that there is a line in /etc/services that says
	'link	87/tcp	ttylink'.
  * Add the following line to /etc/inetd.conf,
	'ttylink stream tcp   nowait root   /usr/sbin/ttylinkd ttylinkd'
  * Get inetd to re-read config file by sending a HUP signal to it.
	To do this find the process number of inetd with ps and then type
	'kill -SIGHUP <number>'

If you want connections from AX25, Net/ROM or ROSE ports, you will have to
edit your ax25d.conf file too, for example mine has;
[VK2XLZ-1 VIA VHF]
NOCALL	 * * * * * *  L
default  * * * * * *  - root /usr/bin/node node
[VK2XLZ-6 VIA VHF]
NOCALL   * * * * * *  L
default  * * * * * *  - root /usr/sbin/ttylinkd ttylinkd

etc, pretty simple stuff.

For programs like node etc to connect to sysop, specify the callers callsign
as a parameter, eg ttylinkd <callsign>.  This will send a message to the
sysop's screen that <callsign> wants to talk to them.