Пробую установить скаченный пакет:
bash-4.4# apt-get install ./bellsoft_jdk11.0.127_linux_amd64_full.rpm 
Reading Package Lists... Done
Building Dependency Tree... Done
Selecting bellsoft-java11-full for './bellsoft_jdk11.0.127_linux_amd64_full.rpm'
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.

Since you only requested a single operation it is extremely likely that
the package is simply not installable and a bug report against
that package should be filed.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
  bellsoft-java11-full: Depends: /usr/sbin/alternatives but it is not installable
                        Depends: /usr/sbin/alternatives but it is not installable
E: Broken packages

Хотя пакет стоит

bash-4.4# apt-cache search alternatives |grep ^alter
alterator-alternatives - alterator module for alternatives package
alternatives - alternatives support


bellsoft_jdk11 нужна для работы 1С