util-vserver binary package in Ubuntu Bionic s390x

 The util-vserver project provides the user-space tools for creating and
 managing the virtualization technology known as Linux-Vserver guests.
 Linux-Vserver guests are a significantly advanced jail mechanism running
 inside a host GNU-Linux server. Linux-Vserver guests can be used to
 securely partition resources such as processes, memory, network; logically
 separate services or run entirely different distributions all on a single
 system. Virtual private servers are separated from each other through security
 contexts, and as a result are completely unaware of each other, or of the
 host itself.
 .
 http://linux-vserver.org/
 http://ftp.linux-vserver.org/pub/utils/util-vserver/

Source package