Blackcoin GUI for Linux x86-64, packaging verified stable Blackcoin-Dev releases. The public latest tag was verified as v30.1.5.1 on September 13, 2026; provenance and immutable tags are recorded in the template repository. Browser GUI is unauthenticated: use only a trusted private LAN or an authenticated VPN/proxy, never direct Internet exposure. Preserve wallet backups, UID/GID 1000 access and the existing appdata mapping; never share one data directory between running clients. Allow 150 seconds for shutdown. Staking and claim mining are disabled at startup; no wallet is created or unlocked automatically. Publishing an image does not update existing containers. See https://projectblackcoin.org/upgrade and the repository publishing guide before upgrading.