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+--- Thread: Ruby: How to install a specific version of a ruby gem? (/Thread-Ruby-How-to-install-a-specific-version-of-a-ruby-gem)
Ruby: How to install a specific version of a ruby gem? - racist454076 - 07-18-2023
Using the command-line `gem` tool, how can I install a specific version of a gem?
RE: Ruby: How to install a specific version of a ruby gem? - earthstar705 - 07-18-2023
Use the `-v` flag:
$ gem install fog -v 1.8
RE: Ruby: How to install a specific version of a ruby gem? - leukodystrophy789593 - 07-18-2023
**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 |
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wheezy/main amd64 Packagesruby | 4.5 |
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squeeze/main amd64 PackagesThen 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
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| bash -s stable --ruby # Install only for the user.#or:# curl -sSL
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| 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 && rvm install ruby-1.9.3 # Locally.
sudo bash -c "source /usr/local/rvm/scripts/rvm && 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.
RE: Ruby: How to install a specific version of a ruby gem? - ruiiqfo - 07-18-2023
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
RE: Ruby: How to install a specific version of a ruby gem? - Mrentoproctqunb - 07-18-2023
For installing
`gem install gemname -v versionnumber`
For uninstall
`gem uninstall gemname -v versionnumber`
RE: Ruby: How to install a specific version of a ruby gem? - hatchability203189 - 07-18-2023
for Ruby 1.9+ use colon.
gem install sinatra:1.4.4 prawn:0.13.0
RE: Ruby: How to install a specific version of a ruby gem? - trunk744 - 07-18-2023
You can use the `-v` or `--version` flag. For example
gem install bitclock -v '< 0.0.2'
To specify upper AND lower version boundaries you can specify the `--version` flag twice
gem install bitclock -v '>= 0.0.1' -v '< 0.0.2'
or use the syntax (for example)
gem install bitclock -v '>= 0.0.1, < 0.0.2'
The other way to do it is
gem install bitclock:'>= 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]
RE: Ruby: How to install a specific version of a ruby gem? - deliberative915 - 07-18-2023
Use the `--version` parameter (shortcut `-v`):
$ gem install rails -v 0.14.1
…
Successfully installed rails-0.14.1
---
You can also use version comparators like `>=` or `~>`
$ gem install rails -v '~> 0.14.0'
…
Successfully installed rails-0.14.4
---
With newer versions of *rubygems* you can tighten up your requirements:
$ gem install rails -v '~> 0.14.0, < 0.14.4'
…
Successfully installed rails-0.14.3
---
Since some time now you can also specify versions of multiple gems:
$ gem install rails:0.14.4 rubyzip:'< 1'
…
Successfully installed rails-0.14.4
Successfully installed rubyzip-0.9.9
But this doesn't work for more than one comparator per gem (yet).
RE: Ruby: How to install a specific version of a ruby gem? - alieqmw - 07-18-2023
Prior to installing, you can check the available versions with the list command.
```
gem list ^[gemname]$ --remote --all
gem install [gemname] -v [version]
```