[ubuntu-za] Upgrade to Ubuntu 9.04 Modufied configuration

[Sudhashen Naicker]

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Sudhashen Naicker
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-----Original Message-----
From: "Dr. Johan P. Prinsloo" <biocura at telkomsa.net>

Date: Fri, 01 May 2009 15:23:14 
To: <charles at finebushpeople.net>; Ubuntu South African Local Community<ubuntu-za at lists.ubuntu.com>
Subject: Re: [ubuntu-za] Upgrade to Ubuntu 9.04 Modufied configuration


FineBushPeople.net wrote:
> You have two considerations:
> 1) Your old configuration file has settings in it specific to your
> installation - you do not want to lose this because setting up is the
> biggest pain of any installation, however
> 2) The new version of dovecot may have options to set, and different
> defaults, than were available in the old version.
>
> Clearly you want the best of both, which is EXACTLY why you get the
> options below...
>
> Dr. Johan P. Prinsloo wrote:
>   
>>  there are 5 options;
>> 1) install the package maintainer's version
>> Ultimately, you want to upgrade to the package maintainers' version,
>> unless it contains trivial changes.
>> 2) keep the local version currently installed
>>   
>>     
> You DO want to keep the local settings, but you also want to upgrade
>   
>> 3) show the differences between the versions
>>   
>>     
>
> I always do this first, just to get an idea of what the differences are,
> and whether I even need to keep the old version's local changes.
> Sometimes it is a configuration file for a package you are not using, or
> the setting is small and easy to do again yourself later.
>
>   
>> 4) show a side-by-side difference between the versions
>>   
>>     
> Sometimes this is hard to follow, so I don't do it.
>
>   
>> 5) start a new shell to examine the situation
>>   
>>     
>
> I've never tried this, so
>   
>> What am I to do with this?
>>   
>>     
>
> Generally, if the difference shows that there are important settings you
> want to keep, and that the new file has important improvements that you
> want, write down the name of the config file (or copy/paste it into an
> editor), choose the "keep the local version currently installed" option
> 2 (or your machine may stop working on reboot), and let the upgrade finish.
>
> Once the upgrade is done, go through the list of configuration files
> that need to be upgraded.  The new version of the file, without your
> local settings, will be called something like 'dovecot.conf.dpkg-dist'
> and will be in the same directory as the active old local config file.
> You need to edit your config file to have the changes in the new file
> while keeping your settings in the old file.
>
> Being a developer and techie, I use vi in difference mode to merge the
> changes (sudo gvim -d old.conf new.conf), but you may be more
> comfortable with 'sudo gedit old.conf new.conf' or any other method or
> editor.
>
> If you are not very technical, it is likely that you do not have many
> local changes so the mission is reduced.
>
> HTH
> regards
> Charles Oertel
>   
Thank you guys, I chose the safer option and stuck to the current
version and it all went fine. I cannot find anything that won't run, but
for mysql that failed to start. I'll run the pc like this for a while
and see what happens.
I'll press on your buttons again if you do not mind.
I must admit though that since I started with Ubuntu way back with 5.10
I've never done a continuous upgrade. I stuck to 6.04 until 8.10 was
released and rebuilt all the PC's with it, but this time round I thought
I'd try this. I now have only another two pc's to upgrade. Each has its
own set of challenges.
Thanks again.
Johan


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