Back up my Debian 4 etc because of ISP 2.2.21 question

Hi
I have some questions and i'd be happy if you help me

1. I have installed Debian 4 etch with ISPConfig 2.2.18 and my questions is can I update it to 2.2.21 without previous versions 2.2.19, 2.2.20 ?? I mean is this correct
2. I have more than 200 email accounts on my server, so first I think to make a back up of my server. So I think to use Partimage (here I find a guide: http://www.debianadmin.com/backup-and-restore-linux-partitions-using-partimage.html)
For example when I type: #fdisk -l , this is the result -

Disk /dev/sda: 248.9 GB, 248999051264 bytes
255 heads, 63 sectors/track, 30272 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 29942 240509083+ 83 Linux
/dev/sda2 29943 30272 2650725 5 Extended
/dev/sda5 29943 30272 2650693+ 82 Linux swap / Solaris

So I must back up the first one sda1 right ?

3 And after that I think to upgrade to 2.2.21 , I know that it makes it owns back up but I want to do all this because some of my friends tell me that they have some problem while updating ISPConfig and now they don't do the updates..

So please tell is all this is right and if you have any suggestions about other back up software please tell me

Thank You in advanced !

 

Hej please is there anyone who can tell me is that all correct ????

 

Yes.

Yes.

Take a look here: http://www.howtoforge.com/howtos/backup

 

Thank you falko. I visit this page and see many different ways to create backup. I like SystemImage , Amanda, but they and most of the other softwares are using backup-host and backup-client , or they are transfering images to an FTP server. In my case I have only one server - it's alone and I can't connect second computer to network , so I search how to make a backup locally and after that transfer it to an external HDD. That's why I was thinking to use PartImage
because it doesn't need other pcs. Do you think PartImage is not good ? And what software you prefer to use for backups falko ?

Or may be Ghost4Linux - I saw that it can backup locally ??

 

Yes, PartImage is a good option. You can use it.

 

Thank you Falko very much

Zesterdaz I made a backup with Ghost4Linux - all was good except one thing - it was very slowly , and during the back up server was not working (and it's an email server). Today I will try PartImage - because it can be used remotely - you don't need to be infront of the server

Thank You for you help