Hi @ksar !
Thank you for your answer !
I think I have unpacked the file well.
I tried: unzip dolibarr-x-x-x.zip
and cp -r dolibarr/* /var/www/mydolibarr/
and unzip dolibarr-x-x-x.zip -d /var/www/mydolibarr/
Is there an error with this logic?
Thank you !