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About Gate One

Gate One is an HTML5 web-based terminal emulator and SSH client. Top features:

  • No browser plugins are required!
  • Supports multiple simultaneous terminal sessions.
  • Advanced terminal emulation including support for 256 colors, fancy text styles, and more.
  • Supports displaying PNG and JPEG images inline inside of terminals (see screenshots).
  • Type in your native language! Gate One supports Unicode, non-English keyboard layouts, and localized strings (internationalization or i18n).
  • Natural copy & paste: Highlight text and use your browser's native context menu. On Linux desktops you can also middle-click-to-paste.
  • Terminal sessions can be resumed even if the browser is closed or disconnected. They can also be resumed from a completely different computer.
  • Supports server-side logging of user sessions via any combination of syslog, remote syslog, or directly to disk. Auditability compliance doesn't get much easier than placing a Gate One server in front of critical hosts!
  • Gate One can be embedded into--and completely controlled by--other applications. A few lines of JavaScript is all it takes!
  • Many authentication mechanisms are supported: Anonymous, Kerberos (Single Sign-On with Active Directory!), PAM, Google Auth, and there's an OpenID-like WebSocket API for applications embedding Gate One (see the chat app in the tests directory for an example of how it works).
  • Gate One is easy to customize: Themes and plugins can add features or override just about anything. In fact, Gate One's SSH functionality is implemented entirely via a plugin.
  • Plugins can be written in any combination of Python, JavaScript, or CSS.
  • The Gate One server can be stopped & started without users losing their running terminal applications (even SSH sessions stay connected!).
  • The SSH plugin allows users to duplicate sessions without having to re-enter their username and password (it re-uses the existing SSH tunnel). It also supports key-based authentication and includes an SSH identity manager that supports RSA, DSA, ECDSA, and even X.509 certificates.
  • The Logging plugin includes a Log Viewer that allows users to sort, view, and even export recordings of their terminal sessions to self-contained HTML files that can be shared. Demonstrating anything on the command line can be as simple as performing the task and exporting the log!
  • The Playback plugin allows users to "rewind" and play back their terminal sessions like a video. This can be done via the playback controls or by holding the shift key while scrolling.


The Grid View showing multiple terminals

Displaying images inline in a terminal


The documentation for Gate One can be found hee:

Also, all (this) documentation is in the "gateone/docs" directory. The HTML form is pre-built and ready-to-read.


There is no live demo of Gate One at the moment but you can view a video demo here:

Important Notes

Gate One is currently in the RELEASE CANDIDATE PHASE. As a result of this a feature freeze is currently in effect. New feature requests may be opened in the issue tracker but they will not be implemented until the next major release of Gate One.

NOTE: hasn't been built yet. It redirects to a landing page for now.

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