How to modify the boot option in grub menu

In Condition of having dual boot option in the system/laptop we have mess in selecting it every time.

Here are simple steps to modify it.

Steps:

1) Login to the Linux flavor you have.

2) Navigate to the path /boot/grub

3) you will find the menu.lst file, open it in any text editor for your comfort.

  The booting option will take decision based on the number in the default = "";

  if its 0 the bootloader will boot the first OS you have  i.e Example: centos

 So if you have 3 OS installed in your system you can use the following numbers in     default options.

Eamples:

 default = 0  <= to boot the first OS shown in list.

 default = 1  <= to boot the second  OS shown in list.

 default = 2  <= to boot the third  OS shown in list.

4) Modify the option you need and save it.

5) Now reboot the machine now you will find the OS that you need to boot in as default.

Ksplice is an open source extension of the Linux kernel

 Ksplice
 
Ksplice is an open source extension of the Linux kernel which
allows system administrators to apply security patches to a running
kernel without having to reboot the operating system (Dynamic Software
Updating).
Ksplice has been implemented for Linux on the x86-32 and x86-64
architectures. It was developed by Ksplice, Inc. until 21 July 2011, when
Oracle acquired Ksplice and started offering support for Oracle Linux.
Support for Red Hat Enterprise Linux was dropped and turned into a free
30-day trial for RHEL customers as an incentive to migrate to Oracle Linux
Premier Support Additionally, anyone can use Ksplice Uptrack for free on
Ubuntu Desktop and Fedora.
 
features:
 
   - Easy to set up
   - Ksplice Uptrack works perfectly in virtualized environments or on bare
   metal.
   - Rollback capability
   - No performance impact
   - Ksplice Uptrack supports using a standard HTTP proxy to pass through
   your firewall.
   - Conveniently check whether all of your systems are up to date, in one
   place, in your web browser.
   - Secure infrastructure
   - email announcement whenever new updates are available for one of your
   systems.
   - API and monitoring
   - Set access policies for individual or groups of machines.
 
Home page: http://www.ksplice.com/
for Binary package and other details:http://pkgs.org/search/?keyword=ksplice

Thanks to dhanasekar @ kaniyam. 

Online Electronics Virtual labs

In our colleges day we will do our labs as just the part of study. but if you are really interested in doing the circuits and getting the circuits stuffs, Dociruits.com provides good place to learn.

Go Here DoCircuits

Reference : http://www.docircuits.com/

Fix your Solder Iron

Fix Solder Iron by your self.
 If the ordinary solder that's of simple structure fails you can fix it .

If you open up the solder iron you will find the 3 Pins Or 2 Pins in it. One will be with diode connected in reverse current direction and second with just the wire winded in it. so if the solder fails then try replacing diode(1n4007).

Open Source Stuffs in Tamil

Are you interested in the getting the open source and Linux stuffs in the Tamil.
Then here is a sample help to you.

Kaniyam a association doing there best in giving the open source and Linux stuffs in Tamil Language.

Here is Link for you geek => Kaniyum

Solarify your home

Are you interested in solar power.
Need help in calculating the power consumption, here is a good solution site done by Sudarsun.
Solar sizing calculator.

MicroMax A87 Ninja - key press sound off

Steps to stop the sound while typing msg in the keyboard in android phone.

In Settings -> Language and keyboard -> andriod keyboard.

Here you go ,,,

un-check the  check box if enabled...


That's it .. good luck :)