Computer Application Notes

Random Notes on solutions for problems encountered using Linux computers

By Darrel Dunn, Ph.D., PG, Hydrogeologist

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Introduction to Linux Computer Application Notes

I am a Linux computer user and not a computer scientist.  I have found that when I have a computer problem and search for a solution on the internet the experience is frustrating.  The information found may be too technical for a scientist who uses a computer but who is not a scientist who specializes in computer technology.  Therefore I have started this page on the date posted below for the purpose of seeing if my solutions to linux computer problems engage others who are searching the internet for such solutions.

Organizing a POP_OS Screen

I recently purchased a Linux computer from System76 with a POP_OS operating system.  The default display on the monitor contained application icons in the dock at the bottom of the screen that I do not use daily.  I prefer an uncrowded dock.  Consequently, I removed the excess icons by right clicking them and selecting "Remove from Favorites."  Then I installed the icon for "Application Finder" by selecting it in the applications found by clicking "Applications" at the top left corner of the screen, right clicking its icon, and clicking "Pin to Dash."  Thus I have an icon in the dash that lists all the installed applications.  

I also removed some applications that I will never use.  I used  "$ sudo dpkg -l" in the terminal window to find the names of the debian packages and $ sudo dpkg -r <package name> to remove the packages.  For packages installed in flatpak, I used "$ sudo flatpak list" to see a list of applications installed in flatpak, and "$ sudo flatpak uninstall <app ID>" to uninstall the apps.  The figure below shows the resulting screen.

POP_OS display after cleaning.

Google Earth Pro not Opening

After installing Google Earth Pro via Pop!_Shop and running it once, I could not open it again.  Instead, I got the message "Another instance of this application is already running."  I solved this problem by uninstalling Google Earth Pro from flatpak as described above, and then reinstalling it as a debian package.  To do this I downloaded the debian package from the Google Earth Pro website.  Then I opened a terminal and migrated to my download folder (using cd).  From the download folder, I installed the debian package with "$ sudo dpkg -i google-earth-pro-stable_current_amd64.deb."  So far, Google Earth Pro is running OK.

Copying Files to External SSD

If the external drive is mounted, get its directory name and location with the following command $ lsblk.  Pertinent results may look like:

├─sdb1   8:17   0 927.5G  0 part /media/darrel/2d5b5e55-5341-49c9-ae3a-e0be5a92d165

Migrate to the directory to be copied  using the cd command.

Copy all subdirectories and files in this directory using the address obtained with lsblk:

$ sudo cp -r . /media/darrel/2d5b5e55-5341-49c9-ae3a-e0be5a92d165.

Posted February 10, 2024