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Capistrano

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What Capistrano is

Capistrano is a free, open-source tool for automating work on remote servers, with workflows for deploying web applications. It connects to deployment targets over SSH and uses SSHKit to run remote commands. Deployments can go to multiple machines concurrently, in sequence, or as a rolling set; tasks can also be assigned to server roles and environments such as QA, staging, and production. Version 3 includes deployment and rollback flows, with hook tasks that users can extend. Capistrano is written in Ruby but can deploy applications in any language. Its built-in source-control plugins support Git, Subversion, and Mercurial, and official plugins address tools and frameworks including Bundler, Composer, Drupal, Laravel, npm, Rails, and Symfony. The Rails plugin adds support for asset pipelines and database migrations. Capistrano is distributed as a Ruby gem and requires Ruby 2.0 or newer. Deployment servers need a POSIX shell, and access requires key-based SSH authentication. It deploys code, but does not run applications or provision their supporting server software. The project is available for Linux, macOS, and Windows under the MIT License.

Who it suits

Capistrano suits developers and operations teams who are comfortable using SSH and the command line on Linux servers, and need to coordinate deployments across remote machines. Its stages, roles, hooks, and source-control plugins are useful for teams managing multiple environments or deployment workflows.

What it does well

Free and open source under the MIT License.
Deploys to multiple machines concurrently, sequentially, or in rolling sets.
Supports deployment stages and server roles.
Version 3 includes deployment and rollback flows with extendable hooks.
Built-in source-control plugins support Git, Subversion, and Mercurial.
Ruby-based tool can deploy applications written in any language.

What to know first

Requires Ruby 2.0 or newer and a POSIX shell on deployment servers.
Requires key-based SSH authentication and command-line comfort.
Does not run applications or provision supporting server software.
Rollback behavior depends on the application and assembled plugins.

Limits

Capistrano deploys code but does not execute the application or provision supporting server software. Rollback behavior depends on the application and assembled plugins, so the project advises testing the procedure beforehand.

Getting started

Visit https://capistranorb.com/.
Install Capistrano as a Ruby gem; the installation guide requires Ruby 2.0 or newer.
Prepare deployment servers with a POSIX shell such as Bash or Sh.
Configure key-based SSH authentication to the deployment servers.
Set up deployment stages, server roles, and source-control plugins as needed.

Verdict

Choose Capistrano if you want a free, extensible way to automate code deployments across SSH-accessible servers, with support for multiple environments and rollback flows. Look elsewhere if you need a tool that also runs applications or provisions their supporting server software, or if SSH and command-line work are not a fit.

Questions

How much does Capistrano cost?

Capistrano is free and open source under the MIT License.

What platforms does Capistrano support?

It is listed for Linux, macOS, and Windows. Its deployment targets are remote servers accessed over SSH.

What languages can it deploy?

Although Capistrano is written in Ruby, it can be used to deploy applications in any language.

Which source-control systems are supported?

Built-in plugins support Git, Subversion, and Mercurial; custom source-control plugins are also possible.

What does it require on deployment servers?

Capistrano requires key-based SSH authentication and expects a POSIX shell such as Bash or Sh on deployment servers.

Does it support rollback?

Version 3 provides rollback flows. How rollback works depends on the application and assembled plugins.

Facts from Capistrano's own pages

Audience fit: The project says Capistrano may not suit users who are not comfortable using SSH and the command line on Linux servers. · github.com, 11 Oct 2026
Deployment: It can deploy web applications to multiple machines simultaneously, in sequence, or as a rolling set. · capistranorb.com, 11 Oct 2026
Deployment limits: Capistrano deploys code but does not know how to execute the application or provision supporting server software by itself. · github.com, 11 Oct 2026
Deployment stages: A deployment can be parameterized for multiple environments such as QA, staging, and production. · github.com, 11 Oct 2026
Deployment tasks: It extends the Rake DSL with methods for running commands on servers. · capistranorb.com, 11 Oct 2026
Deployment workflow: Capistrano v3 provides deployment and rollback flows with hook tasks that users can extend. · capistranorb.com, 11 Oct 2026
Language support: Although Capistrano is written in Ruby, it can be used to deploy any language. · capistranorb.com, 11 Oct 2026
License: The project is distributed under the MIT License and states that it is provided without warranty. · github.com, 11 Oct 2026
Official plugins: Official plugins are listed for Bundler, Composer, Drupal, Laravel, npm, Phusion Passenger, Ruby version managers, Rails, and Symfony. · capistranorb.com, 11 Oct 2026
Parallel execution: Deployment tasks can run concurrently across application servers, using connection pooling. · github.com, 11 Oct 2026
Plugins: Official plugins cover Bundler, Composer, Drupal, Laravel, npm, Phusion Passenger, Ruby version managers, Rails, Symfony, and other tools. · capistranorb.com, 11 Oct 2026
Purpose: Capistrano is a remote server automation and deployment tool written in Ruby. · capistranorb.com, 11 Oct 2026
Rails support: The capistrano-rails gem provides asset pipeline and database migration support. · capistranorb.com, 11 Oct 2026
Remote execution: Capistrano executes remote commands over SSH using SSHKit. · capistranorb.com, 11 Oct 2026
Requirements: The quick start lists Ruby 2.5 or higher locally and source control; Git, Mercurial, and Subversion support is built in. · github.com, 11 Oct 2026
Rollback limitation: Rollback behavior depends on the application and assembled plugins, so users are advised to test their procedure beforehand. · capistranorb.com, 11 Oct 2026
Security: The documentation recommends SSH keys, ideally passphrase-protected and used with an SSH agent, for workstation-to-server authentication. · capistranorb.com, 11 Oct 2026
Security limitation: The documentation notes that sharing one deployment user among team members may be unsuitable or against regulations in some jurisdictions. · capistranorb.com, 11 Oct 2026
Security reporting: The project directs suspected vulnerability reports to [email protected] instead of GitHub issues. · github.com, 11 Oct 2026
Server roles: Servers can be assigned roles to control where tasks run. · github.com, 11 Oct 2026
Shell support: Capistrano 3 expects a POSIX shell such as Bash or Sh on deployment servers. · github.com, 11 Oct 2026
Source control: The built-in source control plugins support Git, Subversion, and Mercurial, and custom SCM plugins are possible. · capistranorb.com, 11 Oct 2026
SSH authentication: Capistrano requires key based SSH authentication to deployment servers. · github.com, 11 Oct 2026
Support: The site links to Stack Overflow and a mailing list for community help. · capistranorb.com, 11 Oct 2026

Where Capistrano stands on Freedom251

Deployment Automation Software#9 of 34