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Spotlight on Solaris
Spotlight On: snoop
Command
After taking the Solaris 10 System Administrator
Certification Exam Part 2 (CX-310-202), one reader
mentioned that he was asked five different questions
on the snoop command. Those of you planning
to go
for the SCSA for Solaris 10, make sure you're familiar
with this command and a few of the more common
options. While trying to keep it brief, here's some
info on snoop: snoop is a network
monitoring utility
that captures network packets passing through a
network interface and displays the contents of the
packets.
First, what's a packet? A network packet is the unit
of data that is routed between an originating system
and a destination system on a network. Information
sent across a network is broken into small chunks for
efficient routing. Each packet is numbered and
includes the internet address of the destination
system. These packets take many routes through
the internet and are reassembled into the original file
once they reach their final destination.
A system administrator can use the snoop
utility to
capture and inspect network packets. Sometimes it's
used in a bad way to view login information as it is
passed across a network, but typically it's used in a
good way to help the system admin troubleshoot a
network issue.
For example, let's say that you're having trouble
establishing an FTP session on another system on the
network. You've used the ifconfig command to
display
the network interface configuration for the device
hme0 to make sure your network interface is
plumbed, up and has an IP address assigned to it as
follows:
Click here to read
more...
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Welcome to the October issue of eKnowledge!
You will see many changes since our last edition --
the On-Line! Detective is beginning to undergo its
first round of enhancements for our "2.0" project. By
the end of this fourth quarter, you're going to be
amazed. Stay tuned - we want to "wow" you!
This month we're debuting the Sun Fire
V1280 and the Sun Fire E2900. Both
now include Administration, Related Documentation,
Troubleshooting and FRU modules. Take a moment to
click over to them. I guarantee you'll learn a thing or
two.
One side project that the Programming Team has
been working on is to make it easier to search words
or phrases within our HTML documents. They've
developed something that may pique your interest -
a new "speed search" function. Simply
highlight the text you want to find more information
on and right-click your mouse. You'll automatically
see many associated results. Give it a try!
The feedback you have provided has been
extremely valuable. We're always looking for different
perspectives. A special thanks to all who have made
suggestions to improve the quality and types of
content we deliver. I hope you enjoy the tokens of
appreciation that were recently mailed to you. Please
keep the suggestions coming.
Regards,
Paul Violassi
CEO, SoftTech Solutions
P.S. I'm not sure where the time goes, but this
month marks SoftTech's 11th Year
Anniversary! Originally started as a paper-based
training manual, our tool has morphed into an
immense knowledge base that is available in both
Web and portable formats. It is hard to believe that
the Detective is already more than a decade old.
Thanks for your support!
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| Lunch & Learn |
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Attend a live Lunch & Learn Webinar showcasing
our newest additions to the On-Line! Detective and
get a sneak peak at what's coming soon. You'll also
have an oppourtunity to participate in a Q&A session
in our interactive forum.
- Tuesday, October 24th @ 1:00 PM EST
- Wednesday, November 8th @ 1:00 PM EST
- Wednesday, November 29th @ 1:00 PM EST
For additional information and links to join the
sessions, please click here.
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| Ask Al |
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Question #1
I want to add a new hard drive to my Ultra 20. Do I
have to get the SATA drive from Sun? What do I
need to do to install and use the new hard drive?
Answer:
We have tested a number of non-Sun SATA hard
drives in the Ultra 20 and there have been no
problems adding them as long as the drive is
preformatted. Just add the hard drive to the Ultra 20,
engage a reconfiguration boot (boot -r) and run the
format utility. The trick is not to execute the format
option.
Click here to read the rest of this
answer...
Question #2
I've installed a new hard drive in my Sun Workstation
and run the format utility to partition the hard
drive. How do I set up the drive to be used in Solaris?
Answer:
Use the newfs command to create UFS file
systems. newfs is a convenient front end to
the mkfs
command. (make file system - the program that
creates the new file system on a disk slice).
On Solaris 9 and 10 systems, disk information
used to set some of the parameter defaults, such as
number of tracks per cylinder and number of sectors
per track, but now this information is read from the
disk label. newfs determines the file system
parameters to use, based on the options you specify
and information provided in the disk label. Parameters
are then passed to the mkfs command, which
builds the file system. Although you can use the
mkfs command directly, it's more difficult to
use and you
must supply many of the parameters manually.
Click here to read the rest of this
answer...
Do you have a question you'd like to see answered in
a future issue of eKnowledge? Email Allen at:
askal@stsolutions.com
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| Detective Success! |
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"We support a variety of SUN products here at the
Johnson Space Center and in the past before the
investment on the On-Line! Detective we used to
troubleshoot the equipment but it took a little bit
longer because of the internet, manuals, and phone
research we did to try to narrow down the failure's
cause.
Back at the beginning of July 2006 we had an
issue on a SUN Ultra Enterprise 4500 that had failed
and locked up. With the use of On-Line Detective we
asked the end user to describe the physical condition
of the Server and the status of the LEDS. With the
information gathered we determined that the system
had a failed CPU but we still needed to confirm that
this was the failure. With a visit to the site and the
information gathered from the On-Line Detective we
were able to confirm the failed part was a failed CPU
and after replacing the failed CPU we had the Server
back up and in production much sooner than
expected."
Jim Garza
Diebold Information and Security Systems
Johnson Space Center
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