gem:tldr:c7375

The command "gem update ${gemname}" is used to update a specific gem package installed in RubyGems.

Here's a breakdown of the command:

• "gem update" is the base command used to update gems in RubyGems.
• "${gemname}" is a placeholder for the name of the specific gem you want to update. You need to replace "${gemname}" with the actual name of the gem you want to update.

For example, if you have a gem called "mygem" installed and you want to update it, you would use the command "gem update mygem". This command will check for the latest version of the given gem and update it if a newer version is available.