What does the "etc" folder in the root directory stand for? I think knowing this will help me remember where certain files are located. Update: Might be useful for others, the folder is used for "...
Whenever /etc/fstab has changed, and one then calls mount, the following message arrives: mount: (hint) your fstab has been modified, but systemd still uses the old version; use 'systemctl d...
It says that the /etc/profile file sets the environment variables at startup of the Bash shell. The /etc/profile.d directory contains other scripts that contain application-specific startup files, which are also executed at startup time by the shell. Why are these files not a part of /etc/profile if they are also critical to Bash startup ?
What do the scripts in /etc/profile.d do? - Unix & Linux Stack Exchange
Can you please edit your question to include the output of sudo apt update and cat /etc/apt/sources.list
UPDATE2 AND SOLUTION: I commented the part out (#Start to #End), that seemingly overwrites the /etc/resolv.conf file and sure enough. That was the culprit. So an obscure script caused all this trouble. I changed the question to reflect, what actually needed to be known to solve my problem, so it would be easier to find for people with the same problem and so I could accept an answer. Thanks ...