Sorry for my mood
There are many days trying to solve a problem that would be simple in the beginning.
The problem is with the settings that the dedicated server vendor applies by default.
Solution:
nano /etc/resolv.conf
nameserver 8.8.8.8
nameserver 8.8.4.4
nameserver 2001: 4860: 4860 :: 8888
nameserver 2001: 4860: 4860 :: 8844
…and this is it
Thank you so much for your time