Booting Linux Faster - 01:11:2 to 00:48:00

[rareisme]

Fortunately, we are not able to access our remote machines these days. And so we are getting enough time to rejuvenate our creativity.

I started two things simultaneously. I am learning HTML, PHP and Perl altogether.

I also started another thing called "Booting Linux Faster". Here it went out the whole day.

Machine Configuration - 512 RAM, Dual core Intel, RHEL5.1

Step 1:
My machine takes time 01:11:2 seconds to get login prompt.

Step 2:
Decide on unnecessary services and stop them.
I stopped
chkconfig ip6tables off
chkconfig setroubleshoot off
chkconfig vmware off
chkconfig bluetooth off
chkconfig sendmail off
chkconfig yum-updatesd off

Now, I am at 01:04:7

Step 3:
I got to know that while starting network manager, it takes much time in starting loopback devices.
I stopped starting loopback devices. I said ONBOOT=no

Now, I was at 01:03:0

Step 4:
Lately, I learned that SPLASH screen takes much time. If you want faster boot, hate splash screen.
I offed
grub splash (comment out grub.conf that splashimage line),
boot splash (edit /etc/sysconfig/init and say no color there)
and KDE splash (go to control center and stop it)

Now, I was at 00:53:2

Step 5:
My kernel has lotta unnecessary modules that gets loaded when I start my machine.
Like even if I use just ethernet... My wireless, bluetooth and router configuration and all such nonsensical things were enabled.
I disabled them and recompiled kernel.

And then finaly I was at 00:48:00

I am too happy that within a minute I can start my work. I press my pc's power button and after a minute, my cpu and disk are idle for me.
Huhhhhhh!!!

--
Thanks, Viral Mehta, Embedded Software Engineer, www.einfochips.com