01-18-2010
Not sure about what you want.
Opening a port is usually more a firewall task. If you are really asking about enabling a service, use the svcadm command if managed by smf or just launch the daemon listening to that port. /etc/service setting isn't mandatory.
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/* Linux Slackware */
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-------------------------------
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LEARN ABOUT MOJAVE
in.talkd
in.talkd(1M) System Administration Commands in.talkd(1M)
NAME
in.talkd, talkd - server for talk program
SYNOPSIS
in.talkd
DESCRIPTION
talkd is a server used by the talk(1) program. It listens at the UDP port indicated in the ``talk'' service description; see services(4).
The actual conversation takes place on a TCP connection that is established by negotiation between the two machines involved.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWrcmds |
+-----------------------------+-----------------------------+
SEE ALSO
svcs(1), talk(1), inetadm(1M), inetd(1M), svcadm(1M), services(4), attributes(5), smf(5)
NOTES
The protocol is architecture dependent.
The in.talkd service is managed by the service management facility, smf(5), under the service identifier:
svc:/network/talk
Administrative actions on this service, such as enabling, disabling, or requesting restart, can be performed using svcadm(1M). Responsibil-
ity for initiating and restarting this service is delegated to inetd(1M). Use inetadm(1M) to make configuration changes and to view config-
uration information for this service. The service's status can be queried using the svcs(1) command.
SunOS 5.10 31 Jul 2004 in.talkd(1M)