Rails仅在特定终端中工作

Question

I have installed rails in ubuntu its working fine in the terminal which i installed, once i close the terminal and open it again and when i check for rails -v am getting following error. Again i tried installing it but no luck same thing repeated again.

This is the installation link i followed

The program 'rails' can be found in the following packages:
 * rails
 * ruby-railties-3.2
Try: sudo apt-get install <selected package>

checked for ruby -v

The program 'ruby' can be found in the following packages:
 * ruby1.8
 * ruby1.9.1
Try: apt-get install <selected package>

and also for gem list rails

The program 'gem' can be found in the following packages:
 * ruby1.9.1
 * rubygems
Try: apt-get install <selected package>

Answer 1

The problem is rails (and gem) are not in your PATH after you restart your terminal session but since your system sees them as packages in the repositories, it suggests you install those packages. Using the repository packages is generally a bad idea with Rails because those packages are out-of-date.

Follow the instructions in this answer to install Ruby and then install rails using

gem install rails

Remember to install RVM as a regular user, not as root.

Edit: Based on your comments, the most likely reason why you're losing rails is because you installed RVM as the root user but you are a regular user after you restart the terminal.