Hi G4sra,

Thanks for your help.

I ran the recommended command, and the terminal output was:

# apt-get update
Reading package lists... Done

Brotherly regards.

Okay. Thanks to everyone for your replies.

Replying to RedGreen925:

Thanks for your help.

I ran the command `apt remove --purge libc6-dev` and the terminal response was “Unable to locate package libc6-dev”.

Then I ran the command `apt install libc6-dev` and the terminal response was “Unable to locate package libc6-dev”.

I ran the command (as root) `apt policy ufw` and the terminal response was “Unable to locate package ufw”. Regarding “gcalculator”, it was a typo on my part. Tux_99 kindly and accurately corrected me below; the correct package name is the one he wrote, “galculator”. I had the same result as with ufw.

I ran the command (as root user) apt install -s libc6-dev and the terminal response was “Could not locate package libc6-dev”.

I tried installing other packages I also use, like Thunderbird and Mirage. In the case of Thunderbird, the terminal's response was, "The package thunderbird could not be located. The package thunderbird is unavailable, but some other package references it. This may mean that the package is missing, obsolete, or only available from some other source."

In the case of Mirage, it was the familiar response, "The package mirage could not be located." Best regards.

Reply to Stultumanto:

Thanks for your help.

I ran the command `apt-get -f install` and the terminal response was “Reading package lists . . . Done. Building dependency tree . . . Done. Reading state information... Done
0 upgraded, 0 new packages to be installed, 0 to remove, and 0 not upgraded.”

I have no connection problems whatsoever. I connect to the internet and the web quickly and perfectly. I can't install anything, Mr. Stultumanto. If you read my reply to RedGreen925, you'll see that I can't install anything.

The terminal output after running the command `apt install synaptic` was: “Synaptic is already up to date (0.91.7).
Set Synaptic as manually installed.
Summary:

Upgrading: 0, Installing: 0, Removing: 0, Not Upgrading: 0”. Best regards.

Reply to Altoid:

Thanks for your help.

I had absolutely no problems with version 5, "Dadaelus." These problems are with version 6, "Excalibur." Best regards.

Reply to Tux_99:

Thanks for your help.

Yes, that's right. I made a mistake. The correct name is the one you mentioned, "galculator." Best regards.

For Greenjeans:

Thanks, Greenjeans. I found the desktop-base folder and was able to make a copy and save it. I know it's not the best solution, but it's helpful while I'm trying to learn how to navigate the file system. I recognize that what I did isn't the best solution.

For Chris2be8:

Thanks for your advice, Chris2be8. I'm going to put it into practice. I didn't even know that command existed. Yes, I'm a complete novice. I was using a distribution that's one of the most beginner-friendly, and it has practically all its functions automated. I realized I wasn't learning much. With Devuan, in the short time I've been using it, I installed the printer, installed plugins, browsers, programs, created my own administrator user (in addition to the root user), created a bootable USB drive, and installed Devuan myself. I know it's very little; I'm still a novice (just a home user), but I'm determined to keep learning. Someone told me that the best way to learn would be to use the parent distribution of the one I was using, which is Debian, but I opted for Devuan, and I'm truly happy with it. I appreciate your advice and will put it into practice.

For Altoid:

Thanks again, Altoid. No, I was able to find it. The answer Greenjeans gave me was very helpful. Of course, yes, I still have a lot, a lot to learn. The answer I gave to Chris2be8 contains some details about my limited level of knowledge. The goal is to keep learning. I find the GNU/Linux world fascinating. I also thank you for the video, although there's a language barrier. Although there are very good videos about Devuan in Spanish, they allowed me to install it myself and adapt this distribution to my needs. Still, I'm reading on.

I also send my thanks to all the participants in this thread. And please excuse my broken English; I'm using a translator.

Hugs to everyone.

I'm going to use a translator. Yes, I have the "desktop-base" package installed in Synaptic. It's marked as installed (green box) in version 1:5.5. I wouldn't need to install that package through the terminal. Sorry if the translation from Spanish to English isn't entirely accurate. Thank you.