Can't find 'Software & Updates'

[chushingura]

Hi, Cannot find PPA listings.  (I tried menu/settings/scroll down. no 'software and updates' in the list. Also tried search 'software', again no  'software and updates' in the list!)  The following is the initial problem. ===========================
Install Updates Error log
===========================
Install Updates could not fetch the package cache information lists.
Go to https://www.linuxliteos.com/forums/ and paste the log below into a new or existing thread for assistance.

============ Log ===========

Hit:1 http://ie.archive.ubuntu.com/ubuntu focal InRelease
Hit:2 http://www.mirrorservice.org/sites/repo..../linuxlite emerald InRelease
Hit:3 http://ie.archive.ubuntu.com/ubuntu focal-updates InRelease
Get:4 http://ie.archive.ubuntu.com/ubuntu focal-backports InRelease [108 kB]
Get:6 http://ie.archive.ubuntu.com/ubuntu focal-security InRelease [114 kB]
Hit:7 http://archive.canonical.com/ubuntu focal InRelease
Hit:8 https://brave-browser-apt-release.s3.brave.com stable InRelease
Hit:5 https://deb.librewolf.net focal InRelease
Get:9 https://download.opensuse.org/repositori...untu_Focal  InRelease [1,553 B]
Err:9 https://download.opensuse.org/repositori...untu_Focal  InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 02456C79B2FD48BF
Reading package lists...
W: GPG error: https://download.opensuse.org/repositori...untu_Focal  InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 02456C79B2FD48BF
E: The repository 'https://download.opensuse.org/repositori...untu_Focal  InRelease' is not signed.

[stevef]

What happens if you open a terminal session and enter the following ?

Code:

software-properties-gtk

[chushingura]

Worked. It seems that I did not have snap installed!................................................................................                                                                                  software-properties-gtk

Command 'software-properties-gtk' not found, but can be installed with:

sudo apt install software-properties-gtk

Reading package lists... Done
Building dependency tree     
Reading state information... Done
The following additional packages will be installed:
  gir1.2-snapd-1
The following NEW packages will be installed:
  gir1.2-snapd-1 software-properties-gtk
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 79.2 kB of archives.
After this operation, 540 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://ie.archive.ubuntu.com/ubuntu focal-updates/main amd64 gir1.2-snapd-1 amd64 1.58-0ubuntu0.20.04.0 [13.2 kB]
Get:2 http://ie.archive.ubuntu.com/ubuntu focal-updates/main amd64 software-properties-gtk all 0.99.9.8 [66.0 kB]
Fetched 79.2 kB in 1s (105 kB/s)             
Selecting previously unselected package gir1.2-snapd-1:amd64.
(Reading database ... 382773 files and directories currently installed.)
Preparing to unpack .../gir1.2-snapd-1_1.58-0ubuntu0.20.04.0_amd64.deb ...
Unpacking gir1.2-snapd-1:amd64 (1.58-0ubuntu0.20.04.0) ...
Selecting previously unselected package software-properties-gtk.
Preparing to unpack .../software-properties-gtk_0.99.9.8_all.deb ...
Unpacking software-properties-gtk (0.99.9.8) ...
Setting up gir1.2-snapd-1:amd64 (1.58-0ubuntu0.20.04.0) ...
Setting up software-properties-gtk (0.99.9.8) ...
Processing triggers for shared-mime-info (1.15-1) ...
Processing triggers for desktop-file-utils (0.24-1ubuntu3) ...
Processing triggers for mime-support (3.64ubuntu1) ...
Processing triggers for hicolor-icon-theme (0.17-2) ...
Processing triggers for gnome-menus (3.36.0-1ubuntu1) ...
Processing triggers for libglib2.0-0:amd64 (2.64.6-1~ubuntu20.04.4) ...
Processing triggers for man-db (2.9.1-1) ..

[chushingura]

go raibh maith agat.

[stevef]

You're welcome.