In Debian derived distributions, you can use the official Crystal repository.
First you have to add the repository to your APT configuration. For easy setup just run in your command line:
curl -sSL https://dist.crystal-lang.org/apt/setup.sh | sudo bash
That will add the signing key and the repository configuration. If you prefer to do it manually, execute the following commands:
curl -sL "https://keybase.io/crystal/pgp_keys.asc" | sudo apt-key add - echo "deb https://dist.crystal-lang.org/apt crystal main" | sudo tee /etc/apt/sources.list.d/crystal.list sudo apt-get update
Once the repository is configured you're ready to install Crystal:
sudo apt install crystal
The following packages are not required, but recommended for using the respective features in the standard library:
sudo apt install libssl-dev # for using OpenSSL sudo apt install libxml2-dev # for using XML sudo apt install libyaml-dev # for using YAML sudo apt install libgmp-dev # for using Big numbers sudo apt install libreadline-dev # for using Readline sudo apt install libz-dev # for using crystal play
For building the Crystal compiler itself, a few other dependencies are needed, see wiki page. They are not required for regular compiler use.
When a new Crystal version is released you can upgrade your system using:
sudo apt update sudo apt install crystal
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