When installing Bundler, the Ruby package manager, or when installing a Gem using Bundler, you may encounter various permission errors or installation failures.
A permission error may occur when running gem install bundler. This is because it attempts to install in the system area by default. To avoid this problem, you can install it in the user area as sudo gem install bundler -n /usr/local/bin/.
In addition, you can avoid problems later by matching the version of bundler in the Gemfile.lock with the version to be installed. For example, sudo gem install bundler -n /usr/local/bin/ -v 1.17.3.
On the other hand, a permission error may also occur when executing bundle install. This is because it tries to install the Gem in the system (global) area by default. To solve this problem, use bundle install --path vendor/bundle to specify that Gem should be installed in the local directory of the project.
However, in some cases, bundle install --path vendor/bundle may fail. In particular, if you get an error like “An error occurred while installing http_parser.rb (0.6.0), and Bundler cannot continue. If you get an error like “An error occurred while installing http_parser.rb (0.6.0, and Bundler cannot continue.