Difference between rhn-profile-sync & yum

Redhat emailed us the following to update/patch our affected RHEL servers.

 * 'up2date -p' (on Enterprise Linux systems prior to RHEL5)
 * 'rhn-profile-sync' (on Enterprise Linux 5 or later)

Q1:
What's the diff betw rhn-profile-sync & yum?

Q2:
Which one will not cause the version of the Linux to be upped?

Q3:
Which one is least likely to break apps?

Q4:
how can I track what's being changed after the sync or yum?
sunhuxAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Seth SimmonsSr. Systems AdministratorCommented:
What's the diff betw rhn-profile-sync & yum?

rhn-profile-sync will update your system information to the red hat network or red hat satellite if you are using that
yum is the tool used by multiple distributions (red hat, cent os, fedora) for installing, updating, upgrading packages

Which one will not cause the version of the Linux to be upped?

yum
rhn-profile-sync only updates the info on your system as far as installed packages; yum does the actual updates

Which one is least likely to break apps?

yum does the updating; depending on what you have installed, it could break apps if a certain version of a library is installed and the upgraded version could break the app.  rhn-profile-sync doesn't do anything with installed packages aside from reporting to RHN what is installed

how can I track what's being changed after the sync or yum?

you can look at /var/log/yum.log though depending on what distribution you have, yum has a new history option (as of version 3.2.29).  do rpm -qa | grep yum to check the version; if it is that version or later, you can do yum history and it will show you history of what was done to the system.  again, rhn-profile-sync doesn't change anything on your system
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
gheistCommented:
A2: You need to rhn_register with AUS/EUS enabled and redhat-release will never be touched.
A3: what are those "apps" - java or COTS products are tested by redhat, homebrew can be tested and if needed recompiled before upgrades.
A4: yum writes logs, rhn_ and up2date skips writing them, you must see them in your RHN/Satellite pages.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Linux Distributions

From novice to tech pro — start learning today.