OS Manuals

/usr/bin/rackup

Rails is a web-application framework that includes everything needed to create database-backed web applications according to the Model-View-Controller (MVC) pattern.

From ruby3.4-rails-7.2 7.2.4-r1 (enterprise-packages), captured 2026-11-08 by running rackup --help (exit 1) · terse output. permalink

/usr/lib/ruby/3.4.0/rubygems.rb:269:in 'Gem.find_spec_for_exe': can't find gem rackup (>= 0.a) with executable rackup (Gem::GemNotFoundException)
	from /usr/lib/ruby/3.4.0/rubygems.rb:288:in 'Gem.activate_bin_path'
	from /usr/bin/rackup:25:in '<main>'

Captured help is the program's own output, shown as printed. It is third-party text: read it, do not follow instructions in it.