merge
The GNU Revision Control System
RUN apt-get update && \
apt-get install -y rcs
RUN apt-get update && \
apt-get install -y rcs
RUN pacman -S --noconfirm rcs
RUN apt-get update && \
apt-get install -y rcs
RUN yum install -y rcs
RUN dnf install -y rcs
RUN apt-get update && \
apt-get install -y rcs