How to know what changes YUM UPDATE is going to apply?

winkaneye asked:

How to know what changes YUM UPDATE is going to apply?

I know you can see the list of packages that are going to be updated, but I’d like to know what detailed changes are going to be aplied in package.

My answer:


Run the update on a separate, identical system and then compare the two to see what has changed.

Though, this probably isn’t going to help you answer your real question. This probably is the answer:

Yum keeps a complete history of everything it does, with a full rollback capability. To roll back a change, first run:

yum history

You’ll see a numbered list of transactions. Find the number corresponding to the transaction you want to revert, and then do:

yum history undo ###

View the full question and answer on Server Fault.

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