I am planning to migrate my old server to new host server. What are the important functions of my old server
so it will run the same to the new host server. What are the steps and needs to consider for me prepare the migration.
Hope you can help me on this please! I really need to do it asap. Greatly appreciated all your help!

it is only you - who knows the functionality of your server.

Yes, only you know what is on your server. It will help to review what you have and make an inventory for yourself of the services, their configurations, and any unusual customizations. Which services do you have installed and runnning? What is the old distro, including version? What is the new distro including version?

The generic steps are backup your data and configurations. Inventory the packages added to the base system and set them up on the new system, while offline, using the backup data and configurations. Tune until they are correct. Then, in some cases, take the original server offline, do another data backup. Transfer the new data to the new server, bring that up online.

However, the devil is in the details and different services might need unique methods to bring up.

For example, when transfering a domain name to a new machine, you'd first reduce the TTL in several steps for the relevant DNS entries, getting shorter as you get closer to the move. Then right before you move, the TTL is down to a minute or so. That way the perceived outage is less than two minutes in the worst case.

1 members found this post helpful.

I agree with the guys here,
Make a note what the server is hosting (files, web server etc..)
Start setting this up on the new server and slowly start to move the services across or just do a backup and restore onto the new server.
You could probs take the old server offline and change the hostname to the same as the old server if other servers rely on the old server.

Good Luck

Is this a web server, a media server, a file server, or what?

As the others have pointed out, more information is needed so we can offer relevant suggestions. Otherwise, we're just shooting in the dark.

I don't think OP is still interested. It is an old thread....