just went through this myself with a clean install of 20.04 in a VM ... I believe the 404 issue has to do with my creating a /var/www/[someotherdomain] ... all of the instructions with regards to apache, lamp and PHPMyAdmin appear to expect users to be using /var/www/HTML ... based on the instructions in this thread, after I substituted [someotherdomain] for [html] in the ln command, PHPMyAdmin now works from an intranet web request ... Mamp and Xampp kind of make us lazy by doing all this setup automatically ... not sure if someone has already written a dependency thread for PHPMyAdmin but would make it easier for those of us that don't do this every day ... trying to create a test environment for some GitHub PHP and Java stuff and just spent several days to get something set up that is usable ... Xampp has the latest PHP which for some reason isn't backward compatible and it wasn't clear if Xampp could load an older version of PHP ... Mamp is ok in that it has the correct version of PHP but the PHP stuff I downloaded only has instructions related to a Unix platform ... so I started with 16.04 32b and ran into irreconcilable configuration issues ... tried 18.04 64b again with multiple configuration issues ... now finally have a working 20.04 64b with PHP and MySQL DB
What I had to do to get PHPMyAdmin working was:
- Install and configure mySqlhttps://www.digitalocean.com/community/tutorials/how-to-install-mysql-on-ubuntu-20-04
- Install and configure apache2 and lamphttps://www.digitalocean.com/community/tutorials/how-to-install-linux-apache-mysql-php-lamp-stack-on-ubuntu-20-04
- Install and configure PHPMyAdminhttps://www.digitalocean.com/community/tutorials/how-to-install-and-secure-phpmyadmin-on-ubuntu-20-04
- reading between the lines debug the 404 issueThe requested URL /phpmyadmin was not found on this server
