Re: How to >>COMPLETELY<< remove an application?
- Date: Thu, 9 Mar 2017 10:02:37 +0000
- From: Brian <ad44@xxxxxxxxxxxxxxx>
- Subject: Re: How to >>COMPLETELY<< remove an application?
On Wed 08 Mar 2017 at 13:32:58 -0500, Cindy-Sue Causey wrote:
> 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.
"purge" indeed does remove all the files the package installed .
This is something an experienced user like the OP should be familiar
> >From "man apt-get":
> 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 is identical to remove except that packages are removed and
> purged (any configuration files are deleted too).
That about sums it up.
> 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".
It is worthwhile considering using "--purge" with "autoremove"
apt-get --purge autoremove
if you want to remove configuration files and update the dpkg database.
 A package can create a directory. If another package puts files
into this directory the directory will not be deleted on purging.