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Test Your Knowledge in Computers #880
Difficulty: Medium
SCADA systems that tie together decentralized facilities such as power, oil, gas pipelines, water distribution and wastewater collection systems were designed to be open, robust, easily operated and repaired, and highly secure.
True or False?
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cports(1m) [opensolaris man page]

cports(1M)						  System Administration Commands						cports(1M)

NAME
cports - expand host names into <host, server, port> triples SYNOPSIS
$CLUSTER_HOME/bin/cports hostname [hostname...] DESCRIPTION
The cports utility expands the hostname arguments into a list of <host, server, port> triples. The returned information is used to access the serial port consoles of the named hosts by way of the terminal server returned in the triples. If an entry for serialports has been made in the /etc/nisswitch.conf file, then the order of lookups is controlled by that entry. If there is no such file or no such entry, then the nameservice look up order is implicitly nis files. EXAMPLES
Example 1 Using the cports Command If the /etc/serialports file contains the entry: pepsi soda-tc 5002 the following command: % cports pepsi prints the following string: pepsi soda-tc 5002 This information can be used by the telnet(1) command to remotely access pepsi's console: % telnet soda-tc 5002 ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWccon | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ SEE ALSO
telnet(1), cconsole(1M), ccp(1M), chosts(1M), crlogin(1M), cssh(1M), ctelnet(1M), serialports(4), attributes(5) Sun Cluster 3.2 8 Sep 2007 cports(1M)

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clusters(4)						     Sun Cluster File Formats						       clusters(4)

NAME
clusters - cluster names database SYNOPSIS
/etc/clusters DESCRIPTION
The clusters file contains information regarding the known clusters in the local naming domain. For each cluster a single line should be present with the following information: clustername whitespace-delimited list of hosts Expansion is recursive if a name on the right hand side is tagged with the expansion marker: ``*''. Items are separated by any number of blanks and/or TAB characters. A `#' indicates the beginning of a comment. Characters up to the end of the line are not interpreted by routines which search the file. Cluster names may contain any printable character other than an upper case character, a field delimiter, NEWLINE, or comment character. The maximum length of a cluster name is 32 characters. This information is used by Sun Cluster system administration tools, like cconsole(1M) to specify a group of nodes to administer. The names used in this database must be host names, as used in the hosts database. The database is available from either NIS or NIS+ maps or a local file. Lookup order can be specified in the /etc/nsswitch.conf file. The default order is nis files. EXAMPLES
Example 1 A Sample /etc/clusters File Here is a typical /etc/clusters file: bothclusters *planets *wine planets mercury venus wine zinfandel merlot chardonnay riesling Here is a typical /etc/nsswitch.conf entry: clusters: nis files FILES
/etc/clusters /etc/nsswitch.conf ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWsczu | +-----------------------------+-----------------------------+ |Interface Stability |Uncommitted | +-----------------------------+-----------------------------+ SEE ALSO
cconsole(1M), chosts(1M), serialports(4), nsswitch.conf(4), attributes(5) Sun Cluster 3.2 26 Jun 2006 clusters(4)

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