Installation guide

TSP is the protocol used by the /usr/sbin/timed daemon. In its simplest
application, the TSP servers on a broadcast network (for example, an
Ethernet) periodically broadcast TSP packets. The hosts on the network
elect one of the hosts on the network running TSP as a master. The master
then controls further operation until it fails and a new master is elected.
The master collects time values from the other hosts and computes an
average. Each host then synchronizes its clock with the master host.
TSP quickly synchronizes all participating hosts, but it does not trace time
back to its sources to determine how accurate the time is. Therefore, the
time distributed by a TSP host can be incorrect.
The DIGITAL UNIX /usr/sbin/timed daemon is the same as the
ULTRIX /etc/timed daemon, with one exception. The DIGITAL UNIX
daemon does not support the −E option. On ULTRIX systems, this option
allows you to force the master time server to distribute its local time to the
network, while the network time is controlled by an outside agent, such as
NTP.
4.16 The sendmail Utility
The sendmail utility is a general-purpose internetwork mail router. It
enables you to send mail to other users on the system and to users on other
systems. In most cases, the mail, mailx, and mh commands rely on the
sendmail utility to parse mail addresses and to resolve system aliases.
The DIGITAL UNIX sendmail utility is the same as the ULTRIX
sendmail utility, except for the following differences:
• The location of the local aliases file has changed.
You can specify local aliases on a DIGITAL UNIX system, just as you
did on an ULTRIX system. The aliases file on a DIGITAL UNIX system
is /var/adm/aliases; on an ULTRIX system it is in /etc/aliases.
You can copy your ULTRIX aliases file to a DIGITAL UNIX system. For
example, enter a command like the following on a DIGITAL UNIX
system to copy an ULTRIX aliases file:
# rcp ultsys:/etc/aliases /var/adm/sendmail/aliases
Once you copy the aliases file to the DIGITAL UNIX system, enter
the newalises command as shown:
# newaliases
This command builds a new copy of the alias database.
4–26 Overview of DIGITAL UNIX System and Network Administration