I have installed ruby (2.7.0) using
snap install ruby
before this, I removed ruby 2.3.0 by deleting all its files, after
sudo apt-get remove ruby
but now the gem command just doesn't work. I have reinstalled it, but whenever I use gem, I get this message,
bash: /usr/local/bin/gem: /usr/local/bin/ruby: bad interpreter: No such file or directory
Ruby is currently installed in
/snap/bin/ruby
Your system PATH is determining the wrong direction for gem.
PATH is an environment variable on Unix-like operating systems, DOS, OS/2, and Microsoft Windows, specifying a set of directories where executable programs are located. In general, each executing process or user session has its own PATH setting. (Wikipedia)
You can fix the problem by finding out which directory is being prioritized using which -a gem, then re-ordering your PATH.
I made a script to achieve this, here: reorderPathForExe.sh
To run this script, just use git clone and chmod +x, then pass the executable you want fixed as the argument to reorderPathForExe.sh (i.e., ./reorderPathForExe.sh gem for you):
git clone https://gist.github.com/f4f83b23386111bedd7f8199949601af.git
cd ./f4f83b23386111bedd7f8199949601af
chmod +x ./reorderPathForExe.sh
./reorderPathForExe.sh gem
you should probably be installing ruby with RVM or rbenv.
I installed ruby and next rails as a gem with this command
gem install rails -include-dependencies
It installed successfully but even after restarting my command window i couldnt run commands like:
rails
or
rails s
My question is what do i have to add to my path so that rails is recognized in my command windwo?
----Update----
I ran gem list but rails isnt listed,
so i will reune the gem install rails command
If you are using rvm you need to use the gemset of RVM in which you have installed your rails gem.
cmd for the same is
rvm gemset list
will list the gemset persent in your version manager, later select the gemset with following command:
rvm gemset use [gemset_name]
hope am redirecting you in the right direction.
Try creating a project with:
rails new whatever
Go into the project:
cd whatever
Install dependencies:
bundle install
Start server:
rails s
If you use a unix based OS, you may need to get the path of the rails executable into your $PATH e.g. by e.g. exec $SHELL -l.
Apologies if you know about this already, but why don't you use a pre-packaged installer like RailsInstaller?
Are you using rbenv?
If so, try running this in your terminal:
rbenv rehash
Since you are using windows, you might not have added Ruby's bin directory in path :
To add path in windows :
Right click My Computer >> properties >> Adavced System Settings
Then edit the path variable in User Variable and just add the path of your installed Ruby's bin directory.
Open a new command prompt to get the path changes.
I use rvm to manage different rubies and their gemsets. My shell is zsh with oh-my-zsh configured with basic settings. Enabled oh-my-zsh plugins are ruby, rails, osx, and git. Here's the command I used to install ruby-1.8.7 and rails-3.0.7.
rvm install 1.8.7
rvm use 1.8.7
gem install rails -v=3.0.7
and then I typed rails and got:
Rails is not currently installed on this system. To get the latest version, simply type:
$ sudo gem install rails
You can then rerun your "rails" command.
I've tried more thorough installs also, Like reinstall rubygems after switching to ruby-1.8.7, or create a completely new gemset, but with no luck.
Here's the rvm info:
ruby-1.8.7-p352#rails:
system:
uname: "Darwin yicai.local 10.8.0 Darwin Kernel Version 10.8.0: Tue Jun 7 16:32:41 PDT 2011; root:xnu-1504.15.3~1/RELEASE_X86_64 x86_64"
bash: "/bin/bash => GNU bash, version 3.2.48(1)-release (x86_64-apple-darwin10.0)"
zsh: "/bin/zsh => zsh 4.3.9 (i386-apple-darwin10.0)"
rvm:
version: "rvm 1.8.6 by Wayne E. Seguin (wayneeseguin#gmail.com) [https://rvm.beginrescueend.com/]"
ruby:
interpreter: "ruby"
version: "1.8.7"
date: "2011-06-30"
platform: "i686-darwin10.8.0"
patchlevel: "2011-06-30 patchlevel 352"
full_version: "ruby 1.8.7 (2011-06-30 patchlevel 352) [i686-darwin10.8.0]"
homes:
gem: "/Users/nil/.rvm/gems/ruby-1.8.7-p352#rails"
ruby: "/Users/nil/.rvm/rubies/ruby-1.8.7-p352"
binaries:
ruby: "/Users/nil/.rvm/rubies/ruby-1.8.7-p352/bin/ruby"
irb: "/Users/nil/.rvm/rubies/ruby-1.8.7-p352/bin/irb"
gem: "/Users/nil/.rvm/rubies/ruby-1.8.7-p352/bin/gem"
rake: "/Users/nil/.rvm/bin/rake"
environment:
PATH: "/Users/nil/.rvm/gems/ruby-1.8.7-p352#rails/bin:/Users/nil/.rvm/gems/ruby-1.8.7-p352#global/bin:/Users/nil/.rvm/rubies/ruby-1.8.7-p352/bin:/Users/nil/.rvm/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin:/usr/local/sbin"
GEM_HOME: "/Users/nil/.rvm/gems/ruby-1.8.7-p352#rails"
GEM_PATH: "/Users/nil/.rvm/gems/ruby-1.8.7-p352#rails:/Users/nil/.rvm/gems/ruby-1.8.7-p352#global"
MY_RUBY_HOME: "/Users/nil/.rvm/rubies/ruby-1.8.7-p352"
IRBRC: "/Users/nil/.rvm/rubies/ruby-1.8.7-p352/.irbrc"
RUBYOPT: ""
gemset: "rails"
and the gem version is 1.8.10, the latest.
If you're running a rails command immediately after installing rails, you will need to restart your terminal before your commands will be recognized.
I had this problem today. Not completely related to your question, but since this page is what comes up in Google when I search for "Rails is not currently installed on this system", I thought I would add my answer:
What happened is that I was using ruby 1.9.2 with rails for a while, but then I needed to use ruby 1.8.7 to run some other script that I found.
Afterwards, I wanted to change by system back to using 1.9.2, and that's where the problem started:
$ rvm list
=> ruby-1.8.7-p352 [ x86_64 ]
ruby-1.9.2-p290 [ x86_64 ]
$ rvm use 1.9.2
I thought that would do the trick. But no, that gives me the "Rails is not currently installed on this system" message.
What I had forgotten is that I had configured rails using an rvm gemset. So I needed to specify the correct gemset when I was selecting which ruby version to make active.
$ rvm gemset list_all
gemsets for ruby-1.8.7-p352 (found in /Users/asgeo1/.rvm/gems/ruby-1.8.7-p352)
global
gemsets for ruby-1.9.2-p290 (found in /Users/asgeo1/.rvm/gems/ruby-1.9.2-p290)
global
rails31
$ rvm use ruby-1.9.2-p290#rails31
That did the trick.
Mac OS X, rbenv, and rails
I was getting the exact same issue but with rbenv rather than rvm. After verifying a correct .bash_profile.
.bash_profile
export PATH="$HOME/.rbenv/bin:/usr/local/bin:$PATH"
eval "$(rbenv init -)"
Restart the shell
exec $SHELL -l
Check the path
echo $PATH
Finally
I repeatedly installed and uninstalled rails but it was never placed in the .rbenv/bin directory after rbenv rehash. In the end I did a find . -name rails and uninstalled every gem that was returned and uninstalled rails. Then:
$ gem install rails
$ rbenv rehash
$ which rails
/Users/palmerc/.rbenv/shims/rails
I had the same issue and found that RVM was not showing as installed either if I tried the rvm command. All it took to fix both problems was running this command in the terminal
$ source ~/.rvm/scripts/rvm
Restart your terminal and then re-run your rails command
Rails is not reporting that it isn't installed. Your Debian system is telling you that rails isn't installed. One thing about rvm is that it relies on some complicated bash shell scripting and you sometimes need to start a fresh shell for changes to appear. You should also make sure that the correct rvm shell commands were added to your .zshrc file.
Also check your path to make sure the ~/.rvm/gems/... path in included.
I ran into this issue using rbenv. Turns out gem install rails did in fact install Rails but rails was not recognized as an executable. The fix for me was to run rbenv rehash.
I found this fix and more details on setting up Rails 5 at https://gorails.com/setup/osx/10.11-el-capitan
I have encountered this problem, but it has been resolved.
I use macOS, I do not use rvm, I only use HomeBrew, I first use gem env to get the installation directory of all gems, mine is:
$ gem env
RubyGems Environment:
-RUBYGEMS VERSION: 3.1.2
-RUBY VERSION: 2.7.1 (2020-03-31 patchlevel 83) [x86_64-darwin19]
-INSTALLATION DIRECTORY: /usr/local/lib/ruby/gems/2.7.0
-USER INSTALLATION DIRECTORY: /Users/myname/.gem/ruby/2.7.0
...
Then you try to go to /usr/local/lib/ruby/gems/2.7.0 to find the executable file directory of the rails gem that you have installed, for example: /usr/local/lib/ruby/gems/2.7.0/bin, then add to the path environment variable
I found this problem but the solutions above didn't solve it. I am not using rvm (and I'm working on mac) and I had to update the path to add rails executable directory:
echo 'export PATH="/usr/local/lib/ruby/gems/3.0.0/bin:$PATH"' >> ~/.zshrc
I had a similar issue, but with rbenv.
I originally installed ruby on bash. Then I played around with .bashrc in VIM, messed that file up, and reset it back to default. In doing so, I unknowingly removed the exported rbenv $PATH. Because of this, my terminal no longer recognized that I had ruby installed.
I revisited the ruby installation page (https://gorails.com/setup/ubuntu/15.04) and tried to set up my rbenv path again with this command:
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bashrc
It failed.
Luckily, I had already switched to zsh (with oh-my-zsh) between the time I messed up my .bashrc and the time I tried to access irb from my terminal.
My solution was to set up the rbenv path per the installation guide, but by replacing all instances of .bashrc with .zshrc like so:
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.zshrc
Hope this helps!
Here's what I've done. And the problem is gone. Hence I guess problem solved.
rvm use system
change to the system ruby. remove all gems in it using the command provided and explained here. then I install wanted ruby versions from scratch:
rvm install 1.8.7
rvm install rails -v 3.0.7
then bundle install
for further detail, might need dig into the gem install procedure.
add source ~/.rvm/scripts/rvm to your .bashrc file if rails installs fine but then you get the error "rails is not currently installed". This frustrated me for a while but I found the answer here: http://www.codelearn.org/blog/how-to-install-ruby-rails-screencasts-linux-mac-windows
I just reloaded my terminal
source ~/.bashrc
See: How do I reload .bashrc without logging out and back in?
Rbenv users
I had the same issue and this worked for me.
Setting the ruby version in the current directory.
rbenv local 2.7.1
Then I was able to run rails new
I had the same problem but the solution above didn't help.
This was my scenario
rvm list
=> ree-1.8.7-2012.02 [ i686 ]
ruby-1.9.3-p125 [ x86_64 ]
which ruby
/Users/dev/.rvm/rubies/ree-1.8.7-2012.02/bin/ruby
which rails
/usr/bin/rails
gem list --local
..
rails (3.2.8)
rails2_asset_pipeline (0.1.20)
railties (3.2.8)
..
rvm use ruby-1.9.3-p125
which ruby
/Users/dev/.rvm/rubies/ruby-1.9.3-p125/bin/ruby
which rails
/Users/dev/.rvm/gems/ruby-1.9.3-p125/bin/rails
By uninstalling rails and railties and reinstalling rails when using ree my problem was resolved.
Hope this helps others in my situation, not sure how I got into it :S
I had the same problem, I ended up deleting my .rvmrc rvm --create --rvmrc 1.8.7#project where the 1.8.7#project is whatever you want your ruby to be. cded in and out and it worked. http://sirupsen.com/get-started-right-with-rvm/
Just had same problem and couldn't find an answer. Here's what I did:
find current rails path
$ which rails
returns something like this: /usr/local/rails
Delete current version:
$ sudo rm -rf /usr/local/rails
Reinstall rails
$ sudo gem install rails
I ran into this same issue and none of the answers given helped so I thought I'd share my solution in case it might be useful for someone else.
I was messing around with my .profile and .bashrc files and along the way I messed up my RVM install. Still not sure exactly what I did, but the fix was easy. Just had to run the following command, which cleans up all of your system path settings for RVM:
rvm get [head|stable] --auto-dotfiles
Note that if you're running an old version of RVM this may upgrade your setup, which may not be what you want.
A possible solution is to not maintain two different configuration files .bash_profile and .bashrc
The solution as 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
I had this error after updating ruby. I had to run 'bundle install' to fix it.
Try to specify gemset explicitely in your Gemfile:
source 'https://rubygems.org'
ruby "2.2.3"
#ruby-gemset=rails424
Try This:
You need to change your terminal emulator preferences to allow login shell.
Sometimes it is required to use /bin/bash --login as the command.
$ bin/bash --login
$ rails -v
I had this message on my Mac:
Rails is not currently installed on this system. To get the latest
version, simply type:
and it was about the $PATH not being correct. The system has an outdated version of rails (/usr/bin/ruby). The path to your chosen version of ruby ($HOME/.rbenv/versions/2.3.0/bin) must precede the system's outdated version along $PATH var, like below:
export PATH="$HOME/.rbenv/versions/2.3.0/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:$PATH"
adjust it to your version of ruby.
For MacOS (High Sierra):
Tokaido is the Rails installer system recommended on the "Getting Started" Rails guide page for Mac OS. But it doesn't just install, it runs its own shell scripts. If you start out using that, which sources its own shell environment, then later start a terminal without launching from the Tokaido shell, this happens, because the "rails" command falls back to the original system rails code on the Mac.
For mine, the 'which rails' command in a normal terminal returns
/usr/bin/rails
But after launching Tokaido's shell, 'which rails' gives this path:
/Users/charlesross/.tokaido/Gems/2.2.0/bin/rails
Out of nowhere Rails wasn't currently installed but, what fixed it was
rvm use ruby-2.6.0
...and verified my path in .bash_profile
export PATH="$PATH:$HOME/.rvm/bin"
I was having this problem today. I haven't 100% solved it, but in new tabs I can do rvm use 2.5.5 and then rails -v works fine.
➜ my-repo git:(next_release) ruby -v
ruby 2.5.5p157 (2019-03-15 revision 67260) [x86_64-darwin18]
➜ my-repo git:(next_release) rails -v
Rails is not currently installed on this system. To get the latest version, simply type:
$ sudo gem install rails
You can then rerun your "rails" command.
➜ my-repo git:(next_release) rvm use 2.5.5
Using /Users/amberwilkie/.rvm/gems/ruby-2.5.5
➜ my-repo git:(next_release) rails -v
Could not find rake-12.3.3 in any of the sources
Run `bundle install` to install missing gems.
➜ my-repo git:(next_release) bundle install
I was looking through the source and found another error message that suggested the user run the following command.
I ran the command and everything now works. None of the suggestions above worked for me. Run the command from inside your newly created Rails app.
gem pristine --all
Here is how it worked for me:
Intall rvm in mac by following the mac installation instruction
rvm install ruby
gem install rails
rails --version
For me ( MacOS Monterey, rbenv) adding rails version to gem install command get the problem resolved.
you can find a specific version of rails that matches to your ruby from this link and replace the VERSION .
gem install rails -v VERSION
rbenv rehash
after successful installation, then rails should be added to /Users/your_user/.rbenv/shims
Also plz check that your shims directory should be the first element of your path.
➜ ~ echo $PATH #
/Users/ario/.rbenv/shims: ...
I was following along with the Odin Project ruby-on-rails course by
installing rbenv,
adding eval "$(rbenv init -)" to ~/.zshrc
installing rails gem
attempting to run rails new my_first_rails_app
But I had forgot to run source ~/.zshrc after editing the file, so I was seeing the error:
Rails is not currently installed on this system.
I'm on Ubuntu. I type in sudo gem install rails. This works fine, installs railes and 7 other gems fine. Yet $ rails blog is saying this:
The program 'rails' is currently not installed. You can install it by typing:
sudo apt-get install rails
Type
gem env
It will give you the installable directory where the bins of the gems are being installed. Something like this:
EXECUTABLE DIRECTORY: /usr/bin
Make sure this directory is in your path.
how did you install rubygems, as an admin, or as a user? if you installed it as a user, it may not have the bin directory in your path.
If I were you, (assuming you installed rubygems into your home folder), I would trash that installation dir (not sure where it defaults to, maybe ~/rubygems? or ~/.rubygems?), then run setup.rb from the rubygems tarball as admin (through sudo) I've done this at least a dozen times on ubuntu, and haven't run into the issue you are hitting.
If that isn't the case, could you please link to the blog post you were following?
Make sure your gem executable path is added to your system path so that the system can find the rails executable.
I know this is an old thread but the same error had me stuck. Make sure you add
source ~/.rvm/scripts/rvm to your .bashrc file
I just bought a new MBP
I've read online Sqlite3 already exists on OSX.
I've downloaded mac ports (and installed it) as well as the bin file for sqlite3 from the official web site.
In a guide I'm reading about rails, which tells me to update sqlite3, I run the following in terminal: sudo port upgrade sqlite3
I receive the following error: Error: sqlite3 is not installed
I am so lost! Please help
I don't remember the default configuration, but like you i installed sqlite myself. You can check your sqlite installation is complete by typing using the which command in the OS X terminal:
$ which sqlite3
/opt/local/bin/sqlite3
If which doesn't reveal anything, then sqlite3 isn't in your system's PATH. Use the cat command to see how that's set up (in your /etc/profile file;)
$ cat /etc/profile
# System-wide .profile for sh(1)
if [ -x /usr/libexec/path_helper ]; then
eval `/usr/libexec/path_helper -s`
fi
if [ "${BASH-no}" != "no" ]; then
[ -r /etc/bashrc ] && . /etc/bashrc
fi
export PATH="/usr/local/bin:/usr/local/sbin:$PATH"
export PATH="/usr/local/mysql/bin:$PATH"
export PATH="/opt/svn/subversion-1.4.3/bin:$PATH"
export PATH="/opt/ruby/bin:$PATH"
export PATH="/opt/sqlite/bin:$PATH"
You can open that file in a text editor and add the path to the lines at the bottom. You can see I've installed sqlite to /opt/sqlite, not /usr/local, so i've had to add that to my path. This tells the system to check there for executable files when a command is given.
Once that's done you need to ensure that Ruby has the functionality it needs to interact with sqlite. We do that by installing the sqlite3 gem. Maybe you don't need to:
$ sudo gem list
Password:
*** LOCAL GEMS ***
# ...loads of gems listed ...
sqlite3-ruby (1.2.4)
# ... loads of gems listed ...
If it's not there, `sudo gem install sqlite3-ruby' will sort you out in no time. Rails should work with sqlite out of the box if you take those two steps.
To install the sqlite gem the binary won't be enough afaik. You'll need the amalgamation tarball from the sqlite website or install it via ports:
sudo port install sqlite3
I've seen many posts that recommend you install XCode Tools. I already had XCode 3.2 Installed. Installing XCode from the CD didn't help.
What did help is the following:
sudo env ARCHFLAGS="-arch x86_64" gem install sqlite3-ruby
I believe the "env ..." statement will also help if you're trying to install mysql on Snow Leopard.
It's not installed via mac ports, so port doesn't know about it. You could either do an install via port or get rails to use the one that's installed on the Mac already.