I really need to finish my thought before hitting send. Anyhow the part i left out.

to remove you use rm or rm -f. If you use the apt-add-ppa process this is how they are added. if they are part of the sources.list file in /etc/apt/ then you will either need to comment out (ignore but keep) or delete the line. This is why the format of "## text" has been adopted to keeps notes on what you are doing within the files.

On Wed, Jan 2, 2019 at 10:59 AM Stephen Partington <cryptworks@gmail.com> wrote:
 This depends on how you add the ppa. Ideally each PPA should be its own file in /etc/apt/sources.list.d directory. all it hugin-nightly.list for example and then your content follows the same format.

## Notes
# Commented out/ignored
deb http://archive.ubuntu.com/ubuntu/ xenial-updates main restricted  #active 

On Wed, Jan 2, 2019 at 10:32 AM James Mcphee <jmcphe@gmail.com> wrote:
-r or --remove

On Wed, Jan 2, 2019 at 10:22 AM Michael <bmike1@gmail.com> wrote:
how does one remove a ppa? I ask because I am going to add the bleeding edge and then, if things break, remove it. I don't expect there to be any problems because it has been 4 months since the last release.
I did look in the man page but there wasn't anything in add-apt-repository that had to do with removing a repository.

On Wed, Jan 2, 2019 at 12:12 PM Michael <bmike1@gmail.com> wrote:
I don't know about that one.  I don't know if I want to play with bleeding edge stuff. Do you think I need to worry?

On Wed, Jan 2, 2019 at 11:51 AM Stephen Partington <cryptworks@gmail.com> wrote:
Answered too soon, they have nightly builds for bionic going it seems, https://launchpad.net/~hugin/+archive/ubuntu/nightly?field.series_filter=bionic

On Wed, Jan 2, 2019 at 9:49 AM Stephen Partington <cryptworks@gmail.com> wrote:
According to the ppa page they don't have a bionic release yet, https://launchpad.net/~hugin/+archive/ubuntu/hugin-builds


On Wed, Jan 2, 2019 at 9:46 AM Michael <bmike1@gmail.com> wrote:
there was one program I couldn't get though.... hugin.

On Wed, Jan 2, 2019 at 11:44 AM Michael <bmike1@gmail.com> wrote:
i'm so happy! I worked through the difficulties!

On Wed, Jan 2, 2019 at 11:25 AM Michael <bmike1@gmail.com> wrote:
Much thanks.

On Wed, Jan 2, 2019 at 11:19 AM Stephen Partington <cryptworks@gmail.com> wrote:
This might be interesting for you. It will help you rebuild your PPA. Note this is for Ubuntu, not mint, but it should be viable if you keep tabs on the mint changes.


On Wed, Jan 2, 2019 at 8:54 AM Michael <bmike1@gmail.com> wrote:
my mistake.... some other ppa is bad

On Wed, Jan 2, 2019 at 10:46 AM Michael <bmike1@gmail.com> wrote:
doe anyone know what is gimp's new ppa for bionic?

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A mouse trap, placed on top of your alarm clock, will prevent you from rolling over and going back to sleep after you hit the snooze button.

Stephen