[CentOS] How to enable yum at startup with yum 2.9

[Andreas Rogge]

> I updated yum 2.4 to yum 2.9 from ATRPMS by using yum as below. 

You should *not* do that. As you already realized, it actually breaks
things.

> But, Since I updated yum to 2.9, All those are gone. 
> 
> Now I want to know that how to enable, restart yum. 
> 
> And also I want ot know should I write a crontab for my daily
> updtaes? 
> 
> Help needed. 

Probably the best guess is: 
- get a copy of the current yum rpm for CentOS 4
- uninstall the atrpms yum
- install the CentOS yum

After you have done that look into the protectbase plugin for yum[1]. It
can be used to prevent a 3rd party repository (like atrpms) from
updating the CentOS base packages, as this is usually not a good idea.

An example how it can be enabled for RPMForge[2] is also avaiable in the
Wiki[3].

Hope that helps

Andreas


[1] http://wiki.centos.org/PackageManagement/Yum/ProtectBase
[2] http://wiki.centos.org/Repositories/RPMForge
[3] http://wiki.centos.org/
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