[CentOS] running yum update on remote servers

Mon Feb 25 14:58:05 UTC 2013
Robert Moskowitz <rgm at htt-consult.com>

On 02/25/2013 09:03 AM, Reindl Harald wrote:
>
> Am 25.02.2013 14:48, schrieb Robert Moskowitz:
>> I have read a couple old threads here on updates for servers, and I am
>> looking for some mechanics to getting the actual updates done.  I don't
>> want automatic updates; I want to control when and what gets updated.
>>
>> First I have to determine that a particular server needs updates.  I
>> suppose a daily script that would run "yum check-updates' and emails me
>> the results could work, but then I would only want the email IF there
>> was something to update, at my limited use of this option does not show
>> anything to trigger a notify on changes.  Does anyone know of a script
>> that would do this?
> /etc/cron.daily:
> #!/bin/bash
> ANG=C; yum -q check-update

I am searching all sorts of combinations to figure out what 'ANG' does.  
I keep getting results like "Emmanuel C. Yumang M.D"  :)

So please enlighten me.

Checking the exit value seems to be important.  I did find 
http://wiki.centos.org/YumCheckOrInstallUpdates which I am studying. And 
it does not use ANG...