10mb — Ubuntu Highly Compressed

Its "mini root filesystem" is only about 5MB compressed. It is frequently used in place of Ubuntu when size is the primary constraint. 3. DIY Compression Guide

allows you to compress the entire filesystem. It is a read-only, highly compressed filesystem frequently used in Ubuntu Live CDs to save space. Comparison of Small Linux Environments Environment Type Typical Compressed Size Key Components Ubuntu Base (Docker) Minimal Ubuntu Core [10] Custom BusyBox/Kernel Kernel + BusyBox binaries [7, 4] Alpine Linux musl libc + BusyBox Ubuntu Server Full CLI environment Step-by-Step: Creating a 10MB Test File in Ubuntu ubuntu highly compressed 10mb

mkdir initrd cd initrd cp /bin/busybox ./bin/ ln -s busybox ./bin/sh echo '#!/bin/sh' > init echo 'mount -t proc none /proc' >> init echo 'exec /bin/sh' >> init chmod +x init find . | cpio -o -H newc | xz --extreme > ../initrd.xz Its "mini root filesystem" is only about 5MB compressed