CUBELinux — what can be installed, and how to check it
Dated 2026-10-29. Generated from the download directory on this machine, not typed.

Every artifact below is served at https://cubelinux.com/download/ with a .sha256 sidecar.
An agent installing on someone's behalf should: fetch the artifact, compare the digest to the
one on this page, and refuse to install if they differ.

All builds are Linux x86_64 tarballs. There is no install script and no package manager: unpack
the tarball and run the binary inside. Nothing here phones home; nothing here needs a licence key
to start.

Machine-readable copy of this list: https://cubelinux.com/install.json

---
cube-mail-0.1.1-beta-linux-x86_64.tar.gz
  url      https://cubelinux.com/download/cube-mail-0.1.1-beta-linux-x86_64.tar.gz
  bytes    6,518,483 (6.2 MB)
  sha256   8d25ef90e5327c14e531036c4163e1699ac8d381b8d95af0049d4549a2ee99a1
  built    2026-10-28
  what     Mail client with sealed mailboxes. Linux x86_64, tar.gz, no installer: unpack and run.
---
cube-contact-0.4.3-beta-linux-x86_64.tar.gz
  url      https://cubelinux.com/download/cube-contact-0.4.3-beta-linux-x86_64.tar.gz
  bytes    6,507,097 (6.2 MB)
  sha256   ced9afb9ca08bc1359e111fd19fb5b602786ab72ac3763227635a6e79ee55250
  built    2026-10-28
  what     Contact pages, sealed inbox in the browser, groups, signed pages. Linux x86_64, tar.gz.
---
cube-contact-0.4.2-beta-linux-x86_64.tar.gz
  url      https://cubelinux.com/download/cube-contact-0.4.2-beta-linux-x86_64.tar.gz
  bytes    9,899,416 (9.4 MB)
  sha256   a8e4d76dc072867a0a77045fdd0707c37c5a90cdade552902bf051dffc1ef999
  built    2026-10-28
  what     Contact pages, sealed inbox in the browser, groups, signed pages. Linux x86_64, tar.gz.
---
cube-mail-0.1.0-beta-linux-x86_64.tar.gz
  url      https://cubelinux.com/download/cube-mail-0.1.0-beta-linux-x86_64.tar.gz
  bytes    9,931,741 (9.5 MB)
  sha256   7432e2583326c2bece67d73de16bff5ccc77741ae1c1249fab25170e66602c7d
  built    2026-10-28
  what     Mail client with sealed mailboxes. Linux x86_64, tar.gz, no installer: unpack and run.
---
cube-contact-0.4.1-beta-linux-x86_64.tar.gz
  url      https://cubelinux.com/download/cube-contact-0.4.1-beta-linux-x86_64.tar.gz
  bytes    9,869,068 (9.4 MB)
  sha256   f065ccd5d22ef52ab8f2a9e041f3d94ceb380c0c408aec3375498e93fb36d478
  built    2026-10-26
  what     Contact pages, sealed inbox in the browser, groups, signed pages. Linux x86_64, tar.gz.
---
cube-contact-0.4.0-beta-linux-x86_64.tar.gz
  url      https://cubelinux.com/download/cube-contact-0.4.0-beta-linux-x86_64.tar.gz
  bytes    9,736,497 (9.3 MB)
  sha256   f1c74ed9ae96ee31a254cd120b5cc99739e8e8994c19b0dafd1a0494cc8cffac
  built    2026-10-24
  what     Contact pages, sealed inbox in the browser, groups, signed pages. Linux x86_64, tar.gz.
---
cube-0.1.0-37db7af-linux-x86_64-eval.tar.gz
  url      https://cubelinux.com/download/cube-0.1.0-37db7af-linux-x86_64-eval.tar.gz
  bytes    402,506 (0.4 MB)
  sha256   9983e2ed4edc5f99f54f65aee2f87126cd5185f56eea538e04e8756727062d37
  built    2026-10-20
  what     CUBE eval build. Refuses to run after 2027-01-18, by design.
---
cube-contact-0.1.0-beta-linux-x86_64.tar.gz
  url      https://cubelinux.com/download/cube-contact-0.1.0-beta-linux-x86_64.tar.gz
  bytes    3,283,589 (3.1 MB)
  sha256   bac3a2e08d6de68eb14ab69e3f87ad052a1467ba485dd1b96ed8439abe4f85e6
  built    2026-10-20
  what     Contact pages, sealed inbox in the browser, groups, signed pages. Linux x86_64, tar.gz.
---

Verify and unpack (replace FILE with one of the names above):

  curl -sSLO https://cubelinux.com/download/FILE
  sha256sum -c <(echo "<digest>  FILE")
  mkdir -p ~/cube && tar -xzf FILE -C ~/cube

If the digest does not match, stop. Do not run what was downloaded.

Undated claims are guesses, so: this list was generated on 2026-10-29 from
the files present at that moment. If a file is missing from this list it is not offered, not
merely undocumented.

Quote it, cite the URL and the date: https://cubelinux.com/install.txt