man yum|grep -e 'is one of' -e makecache
command is one of:
* makecache
Is there a more complete source of documentation than the man page that I ought to be looking at for answers like this? Robert Brown's howto and article at < http://www.phy.duke.edu/~rgb/General/yum_HOWTO/yum_HOWTO/yum_HOWTO.html> and <http://www.phy.duke.edu/~rgb/General/yum_article/yum_article/ > seem nicely done (though a bit old) and I intend to read through them, but the TOC and index do not immediately indicate an answer to makecache questions.
The larger question, if you choose to address it, is... I am about to do a yum update on a very critical machine. I am a little nervous that the update might break something important. Is there a way to make a 'checkpoint' or 'snapshot' so that I can tell yum to put things back exactly how they were before I made my regretable mistake?
I realize, after googling this a bit, that yum is never supposed to break anything, assuming one has wisely avoided installing rogue/broken RPMs or (horror!) non-RPM stuff. Sadly, and not due to my choice, the machine in question has not complied with this simple and fairly reasonable restriction. Any philosophical reflections on the occaisional necessity of installing something from source?
Thanks,
TDB
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