dockerfile.run

ncal

This command is an alias of cal. More information: <https://manned.org/ncal>.

Debian

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

Ubuntu

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

Kali Linux

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

Raspbian

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

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