dockerfile.run

kuvert

wrapper that encrypts or signs outgoing mail

Debian

RUN apt-get update && \
    apt-get install -y kuvert

Ubuntu

RUN apt-get update && \
    apt-get install -y kuvert

Kali Linux

RUN apt-get update && \
    apt-get install -y kuvert

Raspbian

RUN apt-get update && \
    apt-get install -y kuvert

click the source code to copy install kuvert on any operating system with command-not-found.com