lsinitramfs
generic modular initramfs generator (core tools)
RUN apt-get update && \
apt-get install -y initramfs-tools-core
RUN apt-get update && \
apt-get install -y initramfs-tools-core
RUN apt-get update && \
apt-get install -y initramfs-tools-core
RUN apt-get update && \
apt-get install -y initramfs-tools-core