Hi everyone thanks in advace for your help.

Sorry if I repeat the question but I can't find a way to solve my problem in the forum or on the internet.
In Ubuntu 18.04 with lampp I have installed two sites:
/var/www/html/grav-admin/
/var/www/html/grav/
I give these permissions:
sudo chown -R www-data.www-data /var/www/html/grav-admin
sudo chown -R www-data.www-data /var/www/html/grav

I can only access grav installed in /var/www/html/grav/, the other site gives me an 404 error.

I don't want to create virtual hosts, is there a way for both sites to work?

Also I have a project in php in /var/www/html/phpprojet an I can't access.

Thanks for your help.

The separator between user and group needs to be a colon, so your chown's should be sudo chown -R www-data:www-data /var/www/html/grav-admin

You could probably shorten this and run the command over your while html directory, instead of each sub-directory individually : sudo chown -R www-data:www-data /var/www/html

The other thing you could do is set the file and directory permissions

sudo find /var/www/html -type d -exec chmod 755 {} \;
sudo find /var/www/html -type f -exec chmod 644 {} \;

Hi Andrass, thanks for you reply.
Sorry, this don't work, i got the same message:

Not Found

The requested URL was not found on this server.
Apache/2.4.29 (Ubuntu) Server at localhost Port 80

I've restart apache after the changes.

If it's necessary more data, please, tell me.

Regards.

Sorry to hear that your problem is still there. There are a couple of possible reasons, namely server configuration, or a software installation that didn't execute as needed. The fact that you have a third project in /var/www/html/phpprojet which doesn't work neither indicates that it's not basically a Grav problem, and you may need to find someone competent for solving your installation problems. Or google around "software installation in sub-folders".

Keep us informed how it's going !

Thank you Andrass,
I will review what you tell me and if I can solve it I will comment here.
Thanks!!