Thanks for your thoughtful look into my problem.
And that’s how it was.
We use HestiaCP ten servers. Everything is great.
And here we are taking a new server in April
4 CPU 16Gb RAM 1Tb HDD
Immediately we made an update to the Ubuntu system
Then the installation of HestiaCP is successful.
The next activity mark is the creation of the DNS server.
Master server and slave. At the same time, we were finally able to synchronize the Slave DNS on one IP address with another Master.
When we delegated the domain and waited for our NS1 to come into force, NS2 was very happy and celebrated with a glass of red semi-sweet wine.
After we went through the Ubuntu update again, since
when logging into the console, a message appeared with the option to update.
When we now host a new domain, we can delegate it to our NS servers.
It’s time to delegate the domain, for which we began to create mail.
And so, as always, to check the operation of mail on a new domain, we follow the link from the panel and get an error message.
Early we rejoiced, we thought
Once again, we launched the installation of the roundcube,
apt install roundcube
but the installation was interrupted by a message that we already have the base.
That’s all we’ve done up until today.
Yesterday, only, was a good day off, and it was wonderful to spend it in the country.
Today again we are alone with this problem
With best regards?,