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Re: How to >>COMPLETELY<< remove an application?

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On 03/08/2017 12:32 PM, Cindy-Sue Causey wrote:
> On 3/8/17, Richard Owlett <rowlett@cloud85.net> wrote:
>> I recently installed grml-debootstrap from a purchased DVD set of
>> Jessie(8.6.0). I have minimal available bandwidth so I install strictly
>> from DVDs.
>>
>> I have discovered a potential bug for my specific use case and believe
>> I've narrowed the problem source to two specific files.
>>
>> I have used script to record some of my test runs after I had edited the
>> files in question.
>>
>> I wanted to record a test run duplicating the as originally installed
>> environment. I used Synaptic to remove the package - choosing the "Mark
>> for complete removal" option. It notified me that it would remove
>> configuration files which was why I chose that option.
>>
>> I reinstalled grml-debootstrap from the same DVD set. I did a dry run
>> and got a quite different set of errors.
>>
>> IIRC I've seen discussions about removing EVERYTHING related to a
>> package. I don't recall the details.
>>
>> What is the most effective way to completely remove an application?
>>
>> If all else fails, I can reinstall Debian completely to a new partition.
>> But I'd like to use this as an "educational" experience.
>
>
> I use both "apt-get autoremove" and "apt-get purge" for package
> removal. Purge is the one that FEELS LIKE it zaps everything,
> configuration files and all, but I've never gone about it
> scientifically to verify yay or nay for fact.
>
>>From "man apt-get":
>
> +++++++++
>
> remove
>            remove is identical to install except that packages are removed
>            instead of installed. Note that removing a package leaves its
>            configuration files on the system. If a plus sign is appended to
>            the package name (with no intervening space), the identified
>            package will be installed instead of removed.
>
> purge
>            purge is identical to remove except that packages are removed and
>            purged (any configuration files are deleted too).
>
> +++++++++
>
> Ohhhh, and I learned something new today:
>
> +++++++++
>
> autoremove (and the auto-remove alias since 1.1)
>            autoremove is used to remove packages that were automatically
>            installed to satisfy dependencies for other packages and are now no
>            longer needed.
>
> +++++++++
>
> I did not know that. I knew there was "remove" and "autoremove" but
> had never pursued *why*. I started using "autoremove" after I kept
> seeing apt-get proffer it.... for removal of packages that are no
> longer dependencies for anything. So from now on... my opening
> statement will be that I use "apt-get remove" and "apt-get purge".
> *grin*
>
> Do Synaptic, Aptitude, and possibly anything else of that family have
> similarly close but still different flags/commands?
>
> Cindy :)
>

You got me looking at man-apt get.
It reminded me that I should clean my cache between test runs from a 
repeatability perspective. It might explain some warning [rather than 
error] messages I've gotten. I'm doing peculiar things, why shouldn't I 
get peculiar messages.

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Thread

How to >>COMPLETELY<< remove an application? Richard Owlett <rowlett@cloud85.net> - 2017-03-08 19:10 +0100
  Re: How to >>COMPLETELY<< remove an application? Frank <zuiderduin@gmx.com> - 2017-03-08 19:30 +0100
    Re: How to >>COMPLETELY<< remove an application? Richard Owlett <rowlett@cloud85.net> - 2017-03-08 20:20 +0100
  Re: How to >>COMPLETELY<< remove an application? Cindy-Sue Causey <butterflybytes@gmail.com> - 2017-03-08 19:40 +0100
    Re: How to >>COMPLETELY<< remove an application? Richard Owlett <rowlett@cloud85.net> - 2017-03-08 20:40 +0100
      Re: How to >>COMPLETELY<< remove an application? Brian <ad44@cityscape.co.uk> - 2017-03-08 21:50 +0100
      Re: How to >>COMPLETELY<< remove an application? Jimmy Johnson <field.engineer@gmail.com> - 2017-03-09 00:00 +0100
        Re: How to >>COMPLETELY<< remove an application? Richard Owlett <rowlett@cloud85.net> - 2017-03-09 07:20 +0100
        Re: How to >>COMPLETELY<< remove an application? Marc Shapiro <marcnshap@gmail.com> - 2017-03-09 08:50 +0100
    Re: How to >>COMPLETELY<< remove an application? Brian <ad44@cityscape.co.uk> - 2017-03-09 11:10 +0100
      Re: How to >>COMPLETELY<< remove an application? Hans <hans.ullrich@loop.de> - 2017-03-09 12:10 +0100
    Re: How to >>COMPLETELY<< remove an application? Harry Putnam <reader@newsguy.com> - 2017-03-11 13:10 +0100
      Re: How to >>COMPLETELY<< remove an application? Jörg-Volker Peetz <jvpeetz@web.de> - 2017-03-11 14:20 +0100

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