When I tried to follow the answer to How do you install the Ubuntu Touch Coreapps?, it doesn't work on Ubuntu 16.04. After I ran sudo apt update, I got this:
Reading package lists... Done
W: The repository 'http://ppa.launchpad.net/ubuntu-touch-coreapps-drivers/collection/ubuntu xenial Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: The repository 'http://ppa.launchpad.net/ubuntu-touch-coreapps-drivers/daily/ubuntu xenial Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch http://ppa.launchpad.net/ubuntu-touch-coreapps-drivers/collection/ubuntu/dists/xenial/main/binary-amd64/Packages 404 Not Found
E: Failed to fetch http://ppa.launchpad.net/ubuntu-touch-coreapps-drivers/daily/ubuntu/dists/xenial/main/binary-amd64/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
And when I tried to install:
sudo apt-get install ubuntu-sdk touch-coreapps
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package touch-coreapps
Is there an updated way to do this?
The PPA you have currently doesn't have installation candidates for Ubuntu 16.04, so you are getting 404 errors. From this r/Ubuntu post in Reddit, you can use the PPA at https://launchpad.net/~vthompson/+archive/ubuntu/ppa: