Is there a way to do so without starting over?
There is a tool located at https://wiki.centos.org/TipsAndTricks/CentOSUpgradeTool
, but it includes the following note:
DO NOT USE this tool. Warning: use of this tool is currently BROKEN as several system-critical packages are of a higher version number in CentOS 6.7 than they are in CentOS 7 so those do not get upgraded correctly. This renders yum and several other system tools non-functional.
If I should just do a clean install, any recommended steps? Not asking how to install CentOS7, but just a general plan. I've never done this, but on Windows machines I always:
- Make a list of all programs to reinstall.
- Copy My Documents
- Copy my Outlook crap
So for *nix, I guess I would:
- Make a copy of /home and /root
- Copy /etc/?
- Get a list of programs installed (how?)
- What else?
Also, maybe making some sort of backup before doing so makes sense.
Hopefully, there is a good way to upgrade from CentOS6 to CentOS7, but if not...