How to solve this N: See apt-secure(8) manpage for repository creation and user configuration details.?

Question

I use Ubuntu 20.04 dual boot.

sudo apt-get update

I get this:

Get:7 http://security.ubuntu.com/ubuntu focal-security InRelease [107 kB]      
Ign:8 http://ppa.launchpad.net/colingille/freshlight/ubuntu focal InRelease    
Hit:9 http://ppa.launchpad.net/diesch/testing/ubuntu focal InRelease           
Hit:10 http://ppa.launchpad.net/yann
E: The repository 'cdrom://Ubuntu 20.04.1 LTS _Focal Fossa_ - Release amd64 (20200731) focal 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.
E: The repository 'http://ppa.launchpad.net/colingille/freshlight/ubuntu focal 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.``` 

How can I solve this?

score 1 · Accepted Answer · answered Aug 25 '20 at 17:04

1

Remove the cdrom entry from /etc/apt/sources.list file.

Regarding the PPA, it doesn't have files for Ubuntu 20.04. Remove it too.

answered Aug 25 '20 at 17:04

Pilot6

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I'm stuck at "Refreshing software cache". Should I wait? – PMF Aug 25 '20 at 17:20
It is unclear where do you get this message. – Pilot6 Aug 25 '20 at 17:22
Sofwares & Updates – PMF Aug 25 '20 at 17:26
it you find solution? Even i'm getting stuck at 'Refreshing software cache' – Praveen K Oct 16 '20 at 08:37

How to solve this N: See apt-secure(8) manpage for repository creation and user configuration details.?

1 Answers1