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Only had E.OS 5.1 Hera a few days and have encountered 2 issues which I cannot resolve and can be best explained by the two uploaded screenshots. The 1st - this dialog appears whenever I open the app repository and only started to appear after I downloaded via terminal the repositories required for flatpak and sideloading. At the same time I installed FreeFileSync from the online flathub repository.The dialog mentions the possibility of manually downloaded repos as being a possible cause but would like to check with other users.enter image description here The 2nd - I am endeavouring to install the repos necessary for the installation of Timeshift and have been following a procedure shown in an online tutorial. Despite having used the precise same syntax as the tutorial shows the response is as shown. I would truly appreciate any assistance that any one can offer. Many thanks - Bob Deb

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Your first issue appears to be an issue connecting to the Ubuntu archives at au.archive.ubuntu.com. If that's the issue perhaps its temporary. I can connect to the server just fine. In case it is related to other repositories configured, can you run the following command from a terminal and show the output. This will show your system's configured repositories.

grep -r --include '*.list' '^deb ' /etc/apt/sources.list /etc/apt/sources.list.d/

For your second problem, the command add-apt-repository is provided by the software-properties-common package so you just need to install that.

sudo apt -y install software-properties-common
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  • Looks like I am breaking protocol here by sincerely thanking you for 1. Connection to the server has been re-established without any further action by me. 2. Installing software-properties-common has enabled me to successfully install Timeshift. This has been my first post and I am totally unfamiliar with the associated protocols but I can see that there is some sort of voting procedure involved. I will be endeavouring to award your answer maximum points possible but, if through procedural ignorance on my part that doesn't materialise, you can rest assured I am extremely indebted to you.
    – user25089
    Feb 8, 2021 at 9:37
  • Sorry to be a nuisance, but I am unable to find the procedure for logging off from stack exchange. I expected to click on my avatar and select "Log Out" from a drop down menu but this is not the case. I have tried every other conceivable method but without success. Could some kind person steer me in the right direction? Many thanks - Bob Deb.
    – user25089
    Feb 8, 2021 at 10:02
  • You're not a nuisance and you're welcome 😁 You should be able to mark an answer as your selected answer, but no worries about that. What's funny is I couldn't find the log out button either. I've never tried to logout before now. It's hidden under the hamburger menu in the top right corner. Just click that button and a log out button should appear. Cheers!
    – jwillikers
    Feb 8, 2021 at 13:24
  • Found him! Once again many thanks.
    – user25089
    Feb 9, 2021 at 4:36

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