yum update vs yum upgrade

[Tom Diehl]

On Thu, 2 Apr 2009, Timothy Murphy wrote:

> What is the difference between these?
> They seem to have the same effect in my case;

In the stock configuration nothing. They used to be different in that update
would not do obsolete processing and upgrade would. That changed a while back.

>From the yum man page:

update
       If run without any packages, update will update every currently
       installed package.  If one or more packages or package globs are
       specified, Yum will only update the listed packages.  While updating
       packages, yum will ensure that all dependencies are satisfied. If the
       packages or globs specified match to packages which are not currently
       installed then update will not install them.

       If  the  main obsoletes configure option is true (default) or the
       --obsoletes flag is present yum will include package obsoletes in its
       calculations - this makes it better for distro-version changes, for
       example: upgrading from somelinux 8.0 to somelinux 9.

And

upgrade
      Is the same as the update command with the --obsoletes flag set. See
      update for more details.

Regards,

-- 
Tom Diehl		tdiehl at rogueind.com		Spamtrap address mtd123 at rogueind.com