I installed adminer in Ubuntu 22.10 using CLI and it was working successfully in http://localhost/adminer. Now I want to change the theme. Adminer file location (usr/share/adminer). Here I added adminer.css file from here and it was not working in my web browser.
I tried these command for restart the web sever
sudo service apache2 reload
sudo service apache2 restart
Also , I cleared the caches as well but it was not reflecting in the browser.
Had the same issue. What I did is, I removed the default adminer installation using
apt remove adminer -y. Then I downloaded the newest version of adminer from https://www.adminer.org/ and placed the .php file into my default web folder (located at/var/www/html) such as the adminer.css file I have downloaded.