The following error occurs while installing Trial CDP Private Cloud Base   gpg: can't open '/usr/share/doc/cloudera-manager-repository/cloudera-cm5.key': No such file or directory dpkg: error processing package cloudera-manager-repository (--install):   It is an ubuntu 20.4 environment and running inside Docker.   Below is the full error log.   ------------------------------------------------   (Reading database ... 7900 files and directories currently installed.) Preparing to unpack .../cloudera-manager-repository_7.4.4_all.deb ... Warning: The prerm maintainerscript of the package cloudera-manager-repository Warning: seems to use apt-key (provided by apt) without depending on gnupg or gnupg2. Warning: This will BREAK in the future and should be fixed by the package maintainer(s). Note: Check first if apt-key functionality is needed at all - it probably isn't! OK Unpacking cloudera-manager-repository (7.4.4) over (7.4.4) ... Setting up cloudera-manager-repository (7.4.4) ... Warning: The postinst maintainerscript of the package cloudera-manager-repository Warning: seems to use apt-key (provided by apt) without depending on gnupg or gnupg2. Warning: This will BREAK in the future and should be fixed by the package maintainer(s). Note: Check first if apt-key functionality is needed at all - it probably isn't! Warning: apt-key should not be used in scripts (called from postinst maintainerscript of the package cloudera-manager-repository) gpg: can't open '/usr/share/doc/cloudera-manager-repository/cloudera-cm5.key': No such file or directory dpkg: error processing package cloudera-manager-repository (--install): installed cloudera-manager-repository package post-installation script subprocess returned error exit status 2 Errors were encountered while processing: cloudera-manager-repository cat: for: No such file or directory cat: details: No such file or directory     ... View more