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I spotted a small issue in the documentation while installing Nextcloud on Ubuntu Server.
(https://docs.nextcloud.com/server/25/admin_manual/installation/example_ubuntu.html)
I followed the tutorial step by step, but when I tried to access the installation page at:
Not Found The requested URL was not found on this server. Apache/2.4.58 (Ubuntu) Server at "my_private_ip" Port 80
At first, I restarted Apache and checked that all ports and services were running correctly, but everything seemed fine.
After some troubleshooting, I realized that the tutorial instructs users to run:
sudo cp -r nextcloud /var/www
However, with the default Apache configuration on Ubuntu, this does not work because Apache serves files from:
/var/www/html
Moving the Nextcloud directory to /var/www/html fixed the issue immediately.
It might be helpful to update the documentation.