By using Ksplice Uptrack, your Ubuntu Server 9.04 will become rebootless even the kernel is updated.Step 1 :
Get the access key of Ksplice Uptrack at the following link.
The access key will email to you.
Step 2 :
sudo nano /etc/apt/sources.list.d/ksplice.list
Append the following lines to the file.
deb http://www.ksplice.com/apt jaunty ksplice
deb-src http://www.ksplice.com/apt jaunty ksplice
Add the key to repository.
sudo wget -N https://www.ksplice.com/apt/ksplice-archive.asc
sudo apt-key add ksplice-archive.asc
Step 3 :
Install Ksplice Uptrack.
sudo apt-get update
sudo apt-get install uptrack
When installing uptrack, you will be asked for the access key. Go to your email and copy the just received access key to the space provided on the screen.
Step 4 :
sudo nano /etc/uptrack/uptrack.conf
Change the following line and makes Ksplice Uptrack to be installed automatically.
autoinstall = yes
Step 5 :
sudo /etc/init.d/uptrack restart
That's all. See you!