overthinkos/ubuntu
vm/skills/ubuntu/SKILL.md
Ubuntu bootstrap VM (kind:vm ubuntu-debootstrap) — source.kind: bootstrap via ubuntu-debootstrap-builder + debootstrap, ext4 rootfs, uefi-insecure. Plus the disposable check-ubuntu-debootstrap-vm deploy. Lives in the overthinkos/ubuntu submodule. MUST be invoked before editing ubuntu-debootstrap or its check bed.
development
Updated Jun 22, 2026
$ install --global
skillsauthnpx skillsauth add overthinkos/overthink-plugins ubuntuInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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SKILL.md
- name:
- ubuntu
- description:
- |
- Ubuntu bootstrap VM (kind:
- vm ubuntu-debootstrap) — source.kind: bootstrap via
ubuntu (VM)
source.kind: bootstrap VM that builds an Ubuntu 24.04 rootfs from scratch via
debootstrap (using /charly-distros:ubuntu-debootstrap-builder), then boots it
under libvirt/QEMU.
The ubuntu-debootstrap VM entity and its check-ubuntu-debootstrap-vm disposable
test bed live in the overthinkos/ubuntu repo (git submodule at
box/ubuntu), all in that repo's unified charly.yml. The bed is a
disposable: true deploy (a check bed is just a deploy carrying disposable: true
— there is no separate bed kind), driven by charly check run check-ubuntu-debootstrap-vm. Drive the VM lifecycle from the submodule:
charly -C box/ubuntu vm build ubuntu-debootstrap +
charly -C box/ubuntu vm create ubuntu-debootstrap (or
charly --repo overthinkos/ubuntu …).
VM Configuration (from box/ubuntu/charly.yml)
| Setting | Value |
|---|---|
| Source | kind: bootstrap, builder: debootstrap, builder_image: ubuntu-debootstrap-builder |
| Distro | ubuntu |
| rootfs | ext4 |
| Disk / RAM / CPU | 20G / 4G / 2 |
| Machine / firmware | q35 / uefi-insecure |
| Network | user mode |
| SSH | user ubuntu, port 12229, key_source generate |
The ubuntu distro config (inherits: debian; debootstrap suite noble,
mirror, base packages) comes from the embedded build vocabulary
(charly/charly.yml, baked into the charly binary), available to every repo
without an import. The embedded vocabulary carries BOTH distro configs, so
inherits: debian resolves without referencing overthinkos/debian.
Check bed
check-ubuntu-debootstrap-vm is a disposable: true deploy
(vm: {from: ubuntu-debootstrap, disposable: true}), so
charly -C box/ubuntu check run check-ubuntu-debootstrap-vm runs the full R10 sequence
unattended (the equivalent charly update check-ubuntu-debootstrap-vm rebuild also works,
since the bundle is folded into the Bundle map).
debootstrap path
charly vm build ubuntu-debootstrap runs debootstrap inside the privileged
ubuntu-debootstrap-builder to build the rootfs, then writes a bootable disk +
cloud-init seed ISO. The bootstrap path is privileged + network-heavy
(debootstrap downloads the base packages from the Ubuntu mirror). The
Docker-Hub /charly-distros:ubuntu container base remains the faster path when you
don't need a VM disk.
Cross-References
/charly-distros:ubuntu-debootstrap-builder— the builder image this VM uses/charly-distros:ubuntu-debootstrap— the container equivalent of this bootstrap path/charly-vm:debian— the Debian sibling bootstrap VM/charly-vm:arch— the canonical cloud_image VM (BIOS/virtio-gpu/sizing rationale)/charly-vm:vm— VM lifecycle commands + BIOS/UEFI matrix/charly-vm:vms-catalog— VmSpec authoring reference
When to Use This Skill
MUST be invoked when editing ubuntu-debootstrap or its check bed, or
authoring an Ubuntu VM. Invoke BEFORE reading source code or launching Explore agents.
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