Lemon OS is a UNIX-like 64-bit operating system written in C++.

Lemon OS includes its own modular kernel with SMP and networking, window server/compositor and userspace applications as well as a collection of software ports.

If you have any questions or concerns feel free to open a GitHub issue, join our Discord server or email me at computerfido@gmail.com.

Nightly Images - Go to latest job, Lemon.img located under Artifacts
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Before running See System Requirements

More screenshots

• Modular Kernel
• Symmetric Multiprocessing (SMP)
• UNIX/BSD Sockets
• Network Stack (UDP, TCP, DHCP)
• A small HTTP client/downloader called steal
• Window Manager/Server LemonWM
• Terminal Emulator
• Writable Ext2 Filesystem
• IDE, AHCI and NVMe Driver
• Dynamic Linking
• mlibc C Library Port
• LLVM/Clang Port
• DOOM Port

• XHCI Driver
• Intel HD Audio Driver

Lemon OS depends on mlibc, Freetype, zlib, libressl and libpng.

Optional ports include LLVM/Clang, DOOM, Binutils and Python 3.8

Various background images are located here

• 256 MB RAM (512 is more optimal)
• x86_64 Processor supporting x86_64-v2 instructions including SSE4.2
  • For QEMU/KVM use -cpu host or at least -cpu Nehalem see this page
• 2 or more CPU cores recommended
• I/O APIC
• ATA, NVMe or AHCI disk (AHCI strongly recommended)

For QEMU run with:
qemu-system-x86_64 Lemon.img --enable-kvm -cpu host -M q35 -smp 2 -m 1G -netdev user,id=net0 -device e1000,netdev=net0
KVM is strongly recommended