I would not have written had I but found one similar problem solved over the internet. I have searched almost all Q&A sites and am stuck at the exact same spot as 4 hours ago.
I followed the documentation for installing Docker CE on my Ubuntu 17.10 system to the letter. However, when I try running sudo apt-get update, I get the following error on my console:
Ign:1 http://ppa.launchpad.net/mc3man/xerus-media/ubuntu artful InRelease
Get:2 http://security.ubuntu.com/ubuntu artful-security InRelease [78.6 kB]
Hit:3 https://download.docker.com/linux/ubuntu artful InRelease
Hit:4 http://in.archive.ubuntu.com/ubuntu artful InRelease
Err:5 http://ppa.launchpad.net/mc3man/xerus-media/ubuntu artful Release
404 Not Found
Get:6 http://in.archive.ubuntu.com/ubuntu artful-updates InRelease [78.6 kB]
Get:7 http://in.archive.ubuntu.com/ubuntu artful-backports InRelease [72.2 kB]
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/mc3man/xerus-media/ubuntu artful Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
And needless to say, I cannot proceed with Docker. How do I fix this? P.S., I tried editing my sources.list file, but it was ReadOnly and I couldn't save the changes. As an added fact, I noticed that at http://ppa.launchpad.net/mc3man/xerus-media/ubuntu/ , the Release files are located inside the dist/Xenial folder.
Please help me fix this problem.
Edit: Here is my sources.list file for added information.
# deb cdrom:[Ubuntu 17.10 _Artful Aardvark_ - Release amd64 (20171018)]/ artful main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://in.archive.ubuntu.com/ubuntu/ artful main restricted
# deb-src http://in.archive.ubuntu.com/ubuntu/ artful main restricted
## Major bug fix updates produced after the final release of the
## distribution.
deb http://in.archive.ubuntu.com/ubuntu/ artful-updates main restricted
# deb-src http://in.archive.ubuntu.com/ubuntu/ artful-updates main restricted
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://in.archive.ubuntu.com/ubuntu/ artful universe
# deb-src http://in.archive.ubuntu.com/ubuntu/ artful universe
deb http://in.archive.ubuntu.com/ubuntu/ artful-updates universe
# deb-src http://in.archive.ubuntu.com/ubuntu/ artful-updates universe
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://in.archive.ubuntu.com/ubuntu/ artful multiverse
# deb-src http://in.archive.ubuntu.com/ubuntu/ artful multiverse
deb http://in.archive.ubuntu.com/ubuntu/ artful-updates multiverse
# deb-src http://in.archive.ubuntu.com/ubuntu/ artful-updates multiverse
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://in.archive.ubuntu.com/ubuntu/ artful-backports main restricted universe multiverse
# deb-src http://in.archive.ubuntu.com/ubuntu/ artful-backports main restricted universe multiverse
## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu artful partner
# deb-src http://archive.canonical.com/ubuntu artful partner
deb http://security.ubuntu.com/ubuntu artful-security main restricted
# deb-src http://security.ubuntu.com/ubuntu artful-security main restricted
deb http://security.ubuntu.com/ubuntu artful-security universe
# deb-src http://security.ubuntu.com/ubuntu artful-security universe
deb http://security.ubuntu.com/ubuntu artful-security multiverse
# deb-src http://security.ubuntu.com/ubuntu artful-security multiverse
deb [arch=amd64] https://download.docker.com/linux/ubuntu artful stable
# deb-src [arch=amd64] https://download.docker.com/linux/ubuntu artful stable
# deb-src [arch=amd64] https://download.docker.com/linux/ubuntu artful stable
# deb-src [arch=amd64] https://download.docker.com/linux/ubuntu artful stable
# deb-src [arch=amd64] https://download.docker.com/linux/ubuntu artful stable
You have two issues conflated, for starters lets work on xerus-media
cd /etc/apt
grep -r xerus *
now edit the file containing xerus
sudo vi /etc/apt/either_sources.list_or_a_file_in_subdir
delete the line which mentions
http://ppa.launchpad.net/mc3man/xerus-media/ubuntu artful Release
add these lines
deb http://ppa.launchpad.net/mc3man/xerus-media/ubuntu xenial main
deb-src http://ppa.launchpad.net/mc3man/xerus-media/ubuntu xenial main
save that file and confirm you no longer see an error which mentions xerus-media
sudo apt-get update
Now on to the docker issue ... docker package for ubuntu is shipped to xenial ... so lets see what you have ... do this
cd /etc/apt
grep -r docker *
now edit the file which mentions docker as in
sudo vi /etc/apt/sources.list
now edit the line
deb [arch=amd64] https://download.docker.com/linux/ubuntu artful stable
its entry should look like this
deb [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable
(yes xenial its OK its not artful you still get newest docker) now lets see what docker package you have installed ... issue this
dpkg -l | grep docker
you should see this
ii docker-ce 17.09.0~ce-0~ubuntu amd64 Docker: the open-source application container engine
now do an update
sudo apt-get update && sudo apt-get dist-upgrade
are you now locked and loaded ? if not we can continue battling