Upgrading CentOS 6 to 7

Hello Guys,

I'm new using CentOS. In my new job, my boss asked me to upgrade CentOS from 6 to 7. I've read a lot of forums here and outside and there is different information related with this upgrade. Some people say that there is tool to make this upgrade but looks like is old and not working with latest versions. I've searched in several topics here, but I cannot found a clear answer or answer are too old.

Please, can you assist me with my question?

It is possible to upgrade CentOS from 6 to 7 without a fresh installation?

If yes, do you have a step by step site or any how to?

This is a critical server for my Company, so I don't want to brake it.

Thank you for your support an assistance.

Best, Mikiko

edited 20d ago

Since it is a critical server for the company you work for - do not proceed with anything yet.

Now, this has nothing to do with PhalconPHP, this is general Linux OS related stuff. So I'm really not sure if this is the right place for stuff like OS configuration, network etc.

In general upgrade from one major to next major OS release shall always be taken with precaution. That means never ever try anything on a live server, have a VM/container and test it through first on a dev env.

Of course, I always vote for a fresh installation, where possible.

I guess you either need to have a managed server or to hire someone who is a GNU/Linux expert, in other words you should not do it on your own.