How to install a specific version of a ruby gem

Question

Using the command-line gem tool  how can I install a specific version of a gem

User · Accepted Answer

Use the -v flag     gem install fog -v 1 8

User · Answer

You can use the -v or --version flag  For example gem install bitclock -v   lt  0 0 2   To specify upper AND lower version boundaries you can specify the --version flag twice gem install bitclock -v   gt   0 0 1  -v   lt  0 0 2   or use the syntax  for example  gem install bitclock -v   gt   0 0 1   lt  0 0 2   The other way to do it is gem install bitclock   gt   0 0 1   but with the last option it is not possible to specify upper and lower bounderies simultaneously   gem 3 0 3 and ruby 2 6 6

User · Answer

As others have noted  in general use the -v flag for the gem install command   If you re developing a gem locally  after cutting a gem from your gemspec     gem install gemname-version gem   Assuming version 0 8  it would look like this     gem install gemname-0 8 gem

User · Answer

Linux  To install different version of ruby  check the latest version of package using apt as below     apt-cache madison ruby       ruby      1 1 9 3   http   ftp uk debian org debian  wheezy main amd64 Packages       ruby          4 5   http   ftp uk debian org debian  squeeze main amd64 Packages   Then install it     sudo apt-get install ruby 1 1 9 3   To check what s the current version  run     gem --version   Check for the current user    sudo gem --version   Check globally    If the version is still old  you may try to switch the version to new by using ruby version manager  rvm  by   rvm 1 9 3   Note  You may prefix it by sudo if rvm was installed globally  Or run  usr local rvm scripts rvm if your command rvm is not in your global PATH  If rvm installation process failed  see the troubleshooting section     Troubleshooting    If you still have the old version  you may try to install rvm  ruby version manager  via   sudo apt-get install curl   Install curl first curl -sSL https   get rvm io   bash -s stable --ruby   Install only for the user   or   curl -sSL https   get rvm io   sudo bash -s stable --ruby   Install globally     then if installed locally  only for current user   load rvm via   source  usr local rvm scripts rvm  rvm 1 9 3   if globally  for all users   then   sudo bash -c  source  usr local rvm scripts rvm  rvm 1 9 3   if you still having problem with the new ruby version  try to install it by rvm via   source  usr local rvm scripts rvm  amp  amp  rvm install ruby-1 9 3   Locally  sudo bash -c  source  usr local rvm scripts rvm  amp  amp  rvm install ruby-1 9 3    Globally   if you d like to install some gems globally and you have rvm already installed  you may try   rvmsudo gem install  gemname    instead of     gem install  gemname    or    sudo gem install  gemname        Note  It s prefered to NOT use sudo to work with RVM gems  When you do   sudo you are running commands as root  another user in another shell   and hence all of the setup that RVM has done for you is ignored while   the command runs under sudo  such things as GEM HOME  etc      So to   reiterate  as soon as you  sudo  you are running as the root system   user which will clear out your environment as well as any files it   creates are not able to be modified by your user and will result in   strange things happening

User · Answer

Use the --version parameter  shortcut -v      gem install rails -v 0 14 1     You can also use version comparators like  gt   or   gt     gem install rails -v    gt  0 14 0      Or with newer versions of gem even     gem install rails 0 14 4 rubyzip   lt  1      Successfully installed rails-0 14 4 Successfully installed rubyzip-0 9 9

User · Answer

for Ruby 1 9  use colon  gem install sinatra 1 4 4 prawn 0 13 0

User · Answer

For installing gem install gemname -v versionnumber  For uninstall gem uninstall gemname -v versionnumber

[ruby] How to install a specific version of a ruby gem?

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