Insanely Small Linux (ISL)

Insanely Small Linux (ISL) is a minimalist, kernel-focused operating system designed to push the absolute limits of the x86_64 architecture. Developed by Neo. this project focuses on extreme optimization, achieving a functional OS in just 5MB.

• Current latest version: 1.6

Key Achievements

• The 5MB Milestone: Slashed over 80% of the size from standard minimal builds by ditching GRUB in favor of a precision-tuned ISOLINUX bootloader.
• Pure Kernel Hacking: A custom-compiled Linux Kernel 7.0.3, stripped of every non-essential driver and debug symbol.
• Bespoke UI/UX: Features a custom-coded login manager and shell interface, built entirely in POSIX-compliant shell script.
• Instant Execution: It boots directly into the shell for maximum speed.

Specifications

• OS Name: Insanely Small Linux (ISL)
• Kernel: 7.0.3 (Custom Minimalist Build)
• Bootloader: ISOLINUX (El Torito No-Emulation Mode)
• Userland: BusyBox (Statically Linked)

MIT License. Open for forks, hacks, and further minimization.

Screenshots

Open Source Compliance

This project utilizes open-source software. In compliance with the GPL v2, the following resources are provided:

• Kernel & BusyBox Config: Found in the /LEGAL directory. These files contain the exact configuration used to achieve the 5.4MB size.
• Upstream Sources:
  • Linux Kernel: kernel.org
  • BusyBox: busybox.net
• Modifications: All custom scripts (/init, /bin/MyShell) are original works by the developer and are provided under the MIT License.

Download

64bit edition

https://sourceforge.net/projects/insanely-small-linux/files/ISL1.6.iso/download

32bit edition

https://sourceforge.net/projects/insanely-small-linux/files/ISL1.6-32bit.iso/download

Important

Due to 32-bit architectual limitations, the maximum usable memory is approximately 4GB.

Older versions can be downloaded from here.

https://sourceforge.net/projects/insanely-small-linux/files/

Contact

Questions, bug reports or suggestions

• neo059415@gmail.com