dockerfile.run

rtail

File::Tail for Ruby

Debian

RUN apt-get update && \
    apt-get install -y ruby-file-tail

Ubuntu

RUN apt-get update && \
    apt-get install -y ruby-file-tail

Kali Linux

RUN apt-get update && \
    apt-get install -y ruby-file-tail

Fedora

RUN dnf install -y rubygem-file-tail

Raspbian

RUN apt-get update && \
    apt-get install -y ruby-file-tail

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