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Ephervex

Ephervex is a Linux Minecraft launcher and developer tool for disposable bug-reproduction environments. Create an instance with exact Minecraft and loader versions, reproduce a problem, then discard the environment or keep it for later.

The desktop application and command-line interface use the same instance and server storage. Shared downloads, game assets, libraries, and managed Java runtimes can be reused across environments.

Install Ephervex Follow Getting Started

What you can do​

01 / INSTANCESStart with exact versions

Create a temporary or persistent Vanilla, Forge, or NeoForge environment.

02 / MODPACKSImport a pack

Review Modrinth or CurseForge files, optional mods, and manual downloads.

03 / INVESTIGATENarrow down a failure

Use mod isolation, logs, diagnostics, and snapshots to find the cause.

04 / SERVERSTest with a server

Create a standalone or linked server and inspect its console.

See the interface tour, or browse the Feature List for a specific task.

Supported scope​

Ephervex supports Linux on x86_64 and aarch64. On x86_64, it supports Minecraft release versions 1.12.2 and newer with Vanilla, Forge, or NeoForge. A loader must support the exact Minecraft release you choose. Ephervex does not substitute a different version when a selection is unsupported. For Minecraft 1.12.2, Forge builds older than 14.23.5.2851 use an older installer format. They are left out of build lists and refused when selected. On ARM, a Minecraft version also needs compatible native libraries; see installation.

Fabric, Quilt, Minecraft snapshots, pre-releases, and release candidates are not supported. Windows and macOS are not supported. Prism and MultiMC exports are recognized but refused. The desktop interface is currently English only.

Current limitations​

  • Pack files whose authors disable third-party downloads must be downloaded manually.
  • Quitting Ephervex stops running clients and servers.
  • Avoid simultaneous mod changes on the same instance or server, including changes during an active mod isolation session.
  • Session-only Microsoft sign-in does not retain credentials. Persistent credential storage needs a working Secret Service provider, such as GNOME Keyring or KWallet.

For common failures and recovery steps, see Limitations and Troubleshooting.

Ephervex is not affiliated with or endorsed by Mojang or Microsoft.