Finding old debian etch iso

Finding ’s was little crucial when things doesn’t work well during upgrades. Especially when the drives go wrong and you have to continue running the good old distribution, better keep a copy of the ’s.

Here I found those ISO’s to get going.

http://ftp.ch.debian.org/debian-cd/4.0_r7/i386/iso-cd/

http://iso.linuxquestions.org/debian/debian-gnulinux-4.0r1-etch/

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Updating DELL Server firmware on Redhat based Linux Servers

It has become quite simple to upgrade the Servers firmwares if you’re running Linux on them.

Find the repos from Linux portal of Dell.
# set up repos
wget -q -O – http://linux.dell.com/repo/community/bootstrap.cgi | bash
wget -q -O – http://linux.dell.com/repo/firmware/bootstrap.cgi | bash

Install the firmware tools

yum -y install firmware-addon-dell

And here you go. Update BIOS updates/firmwares easily.

# install BIOS update
yum -y install $(bootstrap_firmware)
update_firmware

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Introduction to Wikipedia The Free Encyclopedia

Nagios plugin to check DELL OpenManage (OMSA)

Those who doesn’t like configuring a long list of alert mechanism of on servers, here comes a savior – check_openmanage Nagios plugin. Making life easier.

More info on this plugin:
check_ checks the hardware health of Dell servers running Server Administrator (OMSA). The plugin can be used remotely with SNMP or locally with NRPE, check_by_ssh or similar, whichever suits your needs and particular taste. The plugin checks the health of the storage subsystem, power supplies, memory modules, temperature probes etc., and gives an alert if any of the components are faulty or operate outside normal parameters.

Here are some of its results:

dell-server01 ~$
OK – System: ‘PowerEdge R710′, SN: ‘XXXXXXX’, 72 GB ram (18 dimms), 1 logical drives, 2 physical drives

nagios-server ~$ check_openmanage -H dell-server02
Physical Disk 1:3 [Seagate ST3300007LC, 300GB] on ctrl 0 needs attention: Failure Predicted

It’s neat output and nagios ability to keep us alerted about server issues via email, sound alert through nagios plugins etc makes it feel good to keep a healthier RAID array running on servers.

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Adaptec RAID Monitoring via Nagios

Monitoring servers with RAID controllers is made easy through and other monitoring systems. Today its quite easy to get an app installed on your mobile and configure it to display critical errors from to quickly act on. When you’re an in-charge of Infrastructure, monitoring RAID becomes very very critical.  While digging around simple ways to monitor cards, a tiny little piece of script found on exchange –
check-aacraid.py by Anchor Systems.

This script works with the Storage Manager – arcconf installed to manage RAID Cards.

Here is an excerpt from Nagios Exchange on check-aacraid script configuration for your quick reference :-

Check the health of an Adaptec raid controller using /usr/StorMan/arcconf Checks the following: Logical device status, Controller status, Failed & Degraded drives. If the battery is present: Charging status, Est of charge time left, Charge left %. And removes the log file “UcliEvt.log” that is dropped into the CWD when /usr/StorMan/arcconf is run.
Check the health of an Adaptec raid controller using /usr/StorMan/arcconf

Checks the following:
Logical device status
Controller status
Failed & Degraded drives

If battery present:
Charging status
Est of charge time left
Charge left %

And removes the log file “UcliEvt.log” that is dropped into the CWD when /usr/StorMan/arcconf is run.

Add this to your “/etc/sudoers” file using visudo
"nagios ALL=(root) NOPASSWD: /usr/StorMan/arcconf GETCONFIG 1 *"

## On RHEL & possibly others ##
Disable “Defaults requiretty” in /etc/sudoers otherwise the command will not run via NRPE.

Add this to your checkcommands.cfg

define command {
command_name check_aacraid
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c check_aacraid
}

Add this to your servicedefs.cfg

define service {
use low-service-level
name aacraid-service
service_description aacraid
check_command check_aacraid
register 0
notification_interval 3600
}

Add the service

define service {
use aacraid-service
host_name host-with-crap-adaptec-crud
contact_groups upset-admin
}

And on the host you will be checking add this to nrpe.cfg
command[check_aacraid]=/usr/local/sbin/check-aacraid.py

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Technology for Media Students

Slides used for a technical session at Commits College, Bangalore on 6th July 2011

Additional Reference links:-

  • A Day Without Media – http://bit.ly/qRDEaD
  • 15 Terrific TED Talks for New Media – http://bit.ly/pbZ47n
  • Nine top tips for Media Studies students  - http://bit.ly/rkNd2k

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Arivina Alegalu

Many of you have been working with tools, softwares & technology. Here is an yet another opportunity for you to share your experience with people here in Karnataka.   Friends in Karnataka are here to share your experience with the world in an innovative way. Please visit http://arivu..net to read more.

We decided to celebrate Independence day in an unique way this time by requesting all FOSS enthusiasts to write about their experience in Kannada. Selected articles go live from August 1st to August 14th and on 15th we shall release an eBook of the collection while celebrating the FREEDOM. Yes, we are again celebrating technology and writing for Free and OpenSource Software.  If we get more and more articles, we promise to make them also available for others to read.

Special Notes:- Articles will be released under  License.

You can find more information about the idea behind this event etc on http:://arivu.sanchaya.net

We request all of you to support this event by writing to us, participating in the event actively and also by spreading the word about this event to many others who never get to followup on Social Networking Buzz.

For those who like to “LIKE” we are on facebook – Do like this event and share the info with your friends.

Last date for submitting your articles is 22nd July 2011.

Mail us :- arivu AT sanchaya DOT net for more information.

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