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when i am updating with sudo apt-get update

I have to update this because some library are demanding a updated version, I have tried

a solution which i have mention in bottom side, but it doesn't work and gives an same error again and again

here is the error that I am getting.

Hit:14 http://ppa.launchpad.net/umang/indicator-stickynotes/ubuntu bionic InRelease
Reading package lists... Done 

E: The repository 'https://ftp.ussg.iu.edu/CRAN/bin/linux/ubuntu xenial/ Release' no longer has 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.```

I found this problem [Here][1] , But it does not work for me


  [1]: https://stackoverflow.com/questions/10255082/installing-r-from-cran-ubuntu-repository-no-public-key-error


please tell me the problem
jony
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2 Answers2

1

Solution 1

First try adding the PPA of the repo you need.

If you go to the repo here.

Add the PPA for the right version(my example is for version

sudo add-apt-repository ppa:c2d4u.team/c2d4u4.0+
sudo apt-get update

Then add the repo url to the source.list.

First, take a backup of your /etc/apt/source.list

sudo cp /etc/apt/source.list /etc/apt/source.bak

Replace This

https://ftp.ussg.iu.edu/CRAN/bin/linux/ubuntu xenial/ Release

With this

deb https://cloud.r-project.org/bin/linux/ubuntu xenial-cran40/

In your /etc/apt/source.list

Lastly try updating again.

sudo apt-get update

sudo apt-get upgrade

Solution 2

You might need to point apt-get to the archived repos. I dont recognize your repo URL. From my experience If you are on a Xenial, your source list should not have bionic in it.

Have you tried these repositories?

# deb cdrom:[Ubuntu 16.04 LTS _Xenial Xerus_ - Release amd64 (20160420.1)]/ xenial main restricted
deb http://archive.ubuntu.com/ubuntu xenial main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu xenial main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu xenial-updates main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu xenial-updates main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu xenial-backports main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu xenial-backports main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu xenial-security main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu xenial-security main restricted universe multiverse
# deb http://archive.ubuntu.com/ubuntu xenial-proposed main restricted universe multiverse
deb http://archive.canonical.com/ubuntu xenial partner
deb-src http://archive.canonical.com/ubuntu xenial partner

I hope you have a full backup of this server. From my experience replacing apt list with the wrong repos could break applications and the whole OS.

Anyhow if it really is xenial repo you are after.

First, take a backup of your /etc/apt/source.list

sudo cp /etc/apt/source.list /etc/apt/source.bak

Next copy and paste the repos i provided above.

sudo nano /etc/apt/source.list

Paste the list in with the nano editor or your prefered editor.

Save the file with: ctrl+O

Close the file with: ctrl+X

Lastly try updating again.

sudo apt-get update

sudo apt-get upgrade
Andrija Jostergård
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0

Get sources.list from: https://repogen.simplylinux.ch/generate.php

Replace to your /etc/apt/sources.list with the downloaded file.

Then update using:

sudo apt update
sudo apt dist-upgrade
Mohnish
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Pirooz Jenabi
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