Is there a software with which I can maintain programs i.e. program fixes to apply and if testing is good accept the changes. And keep tracking of changes?

Can you expand on that please? Are you looking for something like CVS or subversion that keeps track of changes to software code?

I just know a software on MVS (z/OS) which keeps track of changes (program fixes) SMPE.
The Software suppose to keep track of changes including a comment. It should be able to undo the changes if
it turns out to be not working or generates another bug.
We are using here GIT for versions of the programs we develop. But if we have softwaqre from another vendor
I want it to keep track of the changes and allow me an undo.
I hope this explains a bit more.
Thanks for your help

OK, I think I understand a little more. Looking at Wikipedia I see that SMP/E seems to aid you in package updates on z/OS. Yum on linux has some similar characteristics. Although I'm not sure it is as robust. In any case, do a search on yum and also yum history. For example: Yum on Wikipedia. Also look at: Yum History. Not all Linux distributions use yum, but I've pretty much only worked with RHEL and CentOS. So, I have no direct knowledge of those other methods.

If you find a particular update causes a problem, you can undo it with yum. Is this what you were after? If I've missed the mark, please let me know.

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I think this is exactly what I was looking for thanks a lot :-))))))

You are welcome.