已安装 Rails 但 rails 命令显示未安装

Question

I'm using Ubuntu 9.10 Karmic Koala and Ruby 1.9.1.

I installed Rails using sudo gem install rails , which installed all the libraries for me.

When I type rails in the terminal it says.

The program 'rails' is currently not installed. You can install it by typing: sudo apt-get install rails rails: command not found

I can find rake, which is under rake1.9.1, but Rails is nowhere to be found, can someone point me in the right direction?

Edit: path to ruby isn't the problem, the problem is where is rails? how do I execute it? rails just doesn't work, where does the exectuable lives?

Answer 1

As others say, this may very well be a PATH variable issue on your bashrc/bash_profile file.

You can learn how to change PATH. .

You can get the current PATH variable by typing echo $PATH

Answer 2

如果您在安装rails后立即运行rails命令，则需要重新启动终端才能识别命令。

Answer 3

刚刚遇到同样的问题，只需在.bashrc中添加以下内容即可

PATH="${PATH}:/var/lib/gems/1.8/bin/"

Answer 4

Assuming ruby-2.0.0-p247 is installed, rails is located at following location.

prayag@prayag$ ls -l ~/.rvm/gems/ruby-2.0.0-p247/bin/
total 60
-rwxr-xr-x 1 prayag prayag 484 Oct  2 00:20 cap
-rwxr-xr-x 1 prayag prayag 487 Oct  2 00:20 capify
-rwxr-xr-x 1 prayag prayag 475 Oct  1 21:13 erubis
-rwxr-xr-x 1 prayag prayag 469 Oct  1 21:13 rackup
-rwxr-xr-x 1 prayag prayag 480 Oct  1 21:18 rails
-rwxr-xr-x 1 prayag prayag 494 Oct  2 00:27 restclient
-rwxrwxr-x 1 prayag prayag 368 Oct  1 21:10 ruby_executable_hooks
-rwxr-xr-x 1 prayag prayag 467 Oct  2 00:27 sass
-rwxr-xr-x 1 prayag prayag 475 Oct  2 00:27 sass-convert
-rwxr-xr-x 1 prayag prayag 467 Oct  2 00:27 scss
-rwxr-xr-x 1 prayag prayag 487 Oct  1 21:20 sprockets
-rwxr-xr-x 1 prayag prayag 483 Oct  2 00:29 stripe-console
-rwxr-xr-x 1 prayag prayag 467 Oct  1 21:17 thor
-rwxr-xr-x 1 prayag prayag 467 Oct  1 21:20 tilt
-rwxr-xr-x 1 prayag prayag 474 Oct  1 21:16 tt

[1] .bash_profile should already be containing following line, if not add.

 [[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm" # Load RVM into a shell session *as a function*

[2] Add following line to the end of .bashrc .

PATH=$PATH:$HOME/.rvm/bin # Add RVM to PATH for scripting
PATH="${PATH}:${HOME}/.rvm/gems/ruby-2.0.0-p247/bin/"

[3] Reload ~/.bashrc

$ source ~/.bashrc

And, it should work.

Answer 5

如果您正在运行rbenv，则需要运行rbenv rehash，以获取对rails-api命令的访问权限。

Answer 6

I think this is not correct way to resolve this problem. But What I have done is, I have created a rails.rb file in my executable directory because when I open that directory file was not there and put the following content.

#!/usr/bin/env ruby_noexec_wrapper
#
# This file was generated by RubyGems.
#
# The application 'railties' is installed as part of a gem, and
# this file is here to facilitate running it.
#

require 'rubygems'

version = ">= 0"

if ARGV.first =~ /^_(.*)_$/ and Gem::Version.correct? $1 then
  version = $1
  ARGV.shift
end

gem 'railties', version
load Gem.bin_path('railties', 'rails', version)

then I try to run rails s in my project and its works..

But before this make sure that executable directory is in your path like I have already in my machine : /home/anand/.rvm/gems/ruby-1.9.3-p286/bin:/home/anand/.rvm/gems/ruby-1.9.3-p286@global/bin:/home/anand/.rvm/rubies/ruby-1.9.3-p286/bin:/home/anand/.rvm/bin

As per TK said you can get the executable path using gem environment command

Answer 7

I added the following lines to my .bashrc file and it worked.

[[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm" # Load RVM into a shell session as a function

PATH="${PATH}:${HOME}/.rvm/gems/ruby-1.9.3-p327/bin/"

Answer 8

gem should have placed the rails executable script in the same location as ruby's. I'd look in there and make sure the permissions are set correctly and it is executable.

Answer 9

If you are using rbenv don't forget add

eval "$(rbenv init -)"

into your .bash_profile or other start up scripts. run rbenv rehash is also needed.

Answer 10

A possible solution is to not maintain two different configuration files .bash_profile and .bashrc

It's suggested in this excellent post on the difference between .bash_profile and .bashrc is to source .bashrc from your .bash_profile file, then putting PATH and common settings in .bashrc .

Quoting,

add the following lines to .bash_profile :

if [ -f ~/.bashrc ]; then source ~/.bashrc fi

end quote

Answer 11

I am using macOS and in my case, I needed to add this line to ~/.zshrc :

export PATH="/usr/local/lib/ruby/gems/3.1.0/gems/railties-7.0.2.3/exe:$PATH"

It can be done like this:

echo 'export PATH="/usr/local/lib/ruby/gems/3.1.0/gems/railties-7.0.2.3/exe:$PATH"' >> ~/.zshrc

My ruby was installed by brew.

Answer 12

You may want to include the path of Ruby/Jruby folder in your bashrc file. That would ensure that you are able to run it from anywhere. Don't forget to restart terminal or "source .bashrc" to reload variables in terminals.