https://dev.to/kcdchennai/apt-update-vs-apt-upgrade-whats-the-difference-2ff8

Use command below :
sudo dpkg -i PACKAGEFILE
reference :
https://askubuntu.com/questions/1407494/screen-share-not-working-in-ubuntu-22-04-in-all-platforms-zoom-teams-google-m
You need to disable Wayland
refrence :
https://askubuntu.com/questions/1407494/screen-share-not-working-in-ubuntu-22-04-in-all-platforms-zoom-teams-google-m
lsof -i :8000
ss -apt
first , purge main package name :
sudo apt-get purge mariadb-server
then
sudo apt autoremove
then run this command to find all packages that may are related to the package which you want to purge :
sudo dpkg -l | grep mariadb
after that purg services that are returned one by one
sudo vi /etc/resolv.conf
remove all content in this file and add below codes :
nameserver [ip]
nameserver [ip]
Check 80 port on your server :
sudo netstat -tulpn | grep :80
In my case I saw my 80 port have gotten by Nginx but I want to give it to Apache so I used this command :
sudo systemctl stop nginx
sudo systemctl start apache2.service
and it worked perfectly
The article in the link below helps in this way.
Check it out.
https://maj0rmil4d.medium.com/how-to-run-our-own-smart-dns-to-bypass-geo-restrictions-beeeab4f82d7
it sometimes happens because you have multiple Operating systems, for example, i have windows and Linux on my machine so I got this problem:
after you tried to mount and unmount your disk you can use the command below as super admin:
sudo fsck -f /dev/sdxx
sdxx is the name of your disk, you can get disk names by command below :
sudo mount