Hi this list is not exactly the same as the gedit generated by the terminal
Line 18 on mine is as quoted on my last post. Also only 140 lines on mine & this has 147
Below, I'll refer to the line numbers listed in your sources.list posting. Keep that in mind.
Steps To Edit Your Sources.list:
1. In your terminal type:
sudo -i gedit /etc/apt/sources.list
2. In Gedit, blank line 129, which looks like this:
deb http://gb.archive.ubuntu.com/ubuntu/ xenial universe multiverse
This line is a partial duplicate of line 18 and line 28.
3. In Gedit, blank line 130, which looks like this:
deb-src http://gb.archive.ubuntu.com/ubuntu/ xenial main restricted
This line is a duplicate of line 8.
4. In Gedit, blank line 83, which looks like this:
deb http://archive.canonical.com/ubuntu wily partner
This line is a duplicate of line 52.
5. In Gedit, blank line 133, which looks like this:
deb http://gb.archive.ubuntu.com/ubuntu/ xenial-updates main restricted
This line is a duplicate of line 12.
6. In Gedit, blank line 134, which looks like this:
deb http://gb.archive.ubuntu.com/ubuntu/ xenial-backports main restricted
This line is a partial duplicate of line 38.
7. In Gedit, click "Save", and then close Gedit.
8. In your terminal type:
sudo apt-get update
Your new sources.list should look like this:
# deb cdrom:[Ubuntu 16.04 LTS _Xenial Xerus_ - Beta amd64 (20160323)]/ xenial main restricted
# deb cdrom:[Ubuntu 15.10 _Wily Werewolf_ - Release amd64 (20151021)]/ wily main restricted
# deb cdrom:[Ubuntu 15.10 _Wily Werewolf_ - Release amd64 (20151021)]/ wily main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://gb.archive.ubuntu.com/ubuntu/ xenial main restricted
deb-src http://gb.archive.ubuntu.com/ubuntu/ xenial main restricted
## Major bug fix updates produced after the final release of the
## distribution.
deb http://gb.archive.ubuntu.com/ubuntu/ xenial-updates main restricted
deb-src http://gb.archive.ubuntu.com/ubuntu/ xenial-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://gb.archive.ubuntu.com/ubuntu/ xenial universe
deb-src http://gb.archive.ubuntu.com/ubuntu/ xenial universe
deb http://gb.archive.ubuntu.com/ubuntu/ xenial-updates universe
deb-src http://gb.archive.ubuntu.com/ubuntu/ xenial-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://gb.archive.ubuntu.com/ubuntu/ xenial multiverse
deb-src http://gb.archive.ubuntu.com/ubuntu/ xenial multiverse
deb http://gb.archive.ubuntu.com/ubuntu/ xenial-updates multiverse
deb-src http://gb.archive.ubuntu.com/ubuntu/ xenial-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://gb.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse
deb-src http://gb.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse
deb http://gb.archive.ubuntu.com/ubuntu/ xenial-security main restricted
deb-src http://gb.archive.ubuntu.com/ubuntu/ xenial-security main restricted
deb http://gb.archive.ubuntu.com/ubuntu/ xenial-security universe
deb-src http://gb.archive.ubuntu.com/ubuntu/ xenial-security universe
deb http://gb.archive.ubuntu.com/ubuntu/ xenial-security multiverse
deb-src http://gb.archive.ubuntu.com/ubuntu/ xenial-security 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 wily partner
# deb http://download.ebz.epson.net/dsc/op/stable/debian/ xenial main
# deb-src http://archive.canonical.com/ubuntu wily partner
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
## Major bug fix updates produced after the final release of the
## distribution.
## 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.
## 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.
## 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.
## 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://download.ebz.epson.net/dsc/op/stable/debian/ xenial main
# deb-src http://archive.canonical.com/ubuntu wily partner
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
# deb-src http://gb.archive.ubuntu.com/ubuntu/ xenial main restricted
## Major bug fix updates produced after the final release of the
## distribution.
# deb-src http://gb.archive.ubuntu.com/ubuntu/ xenial-updates main restricted
## 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
## universe WILL NOT receive any review or updates from the Ubuntu security
## team.
# deb-src http://gb.archive.ubuntu.com/ubuntu/ xenial universe
# deb-src http://gb.archive.ubuntu.com/ubuntu/ xenial-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-src http://gb.archive.ubuntu.com/ubuntu/ xenial multiverse
# deb-src http://gb.archive.ubuntu.com/ubuntu/ xenial-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-src http://gb.archive.ubuntu.com/ubuntu/ xenial-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 xenial partner
deb-src http://archive.canonical.com/ubuntu xenial partner
# deb-src http://security.ubuntu.com/ubuntu xenial-security main restricted
# deb-src http://security.ubuntu.com/ubuntu xenial-security universe
deb http://download.ebz.epson.net/dsc/op/stable/debian/ lsb3.2 main
# deb-src http://security.ubuntu.com/ubuntu xenial-security multivers
deb http://security.ubuntu.com/ubuntu/ xenial-security universe main multiverse restricted
# deb http://archive.canonical.com/ubuntu xenial partner
# deb-src http://archive.canonical.com/ubuntu xenial partner
# deb http://extras.ubuntu.com/ubuntu xenial main
# deb-src http://extras.ubuntu.com/ubuntu xenial main
Since you seem to be doing a lot of fiddling with your sources.list I'd suggest making a backup copy, so that if you ever get into trouble, you can easily get Apt back to a working state by restoring the sources.list from the backup. Just a thought.
Steps To Make A Backup Copy Of Sources.list:
1. In your terminal type:
sudo cp -i /etc/apt/sources.list /etc/apt/sources.list.backup
If prompted to overwrite, type "y" (means yes), and press "enter". Alternatively type "n" (means no) to abort. You will only be prompted to overwrite if you've previously made a backup.
Steps To Restore Backup Copy Of Sources.list:
1. In your terminal type:
sudo cp -i /etc/apt/sources.list.backup /etc/apt/sources.list
When prompted to overwrite, type "y" (means yes), and press "enter". Alternatively type "n" (means no) to abort.
2. In your terminal type:
sudo apt-get update