Common Ruby + GEM commands

Ruby-V # view Ruby version

Ruby-e ''require "watir"; puts watir: IE: version'' # view watir version
Gem-V # gem version
Gem update # update all packages
Gem update -- System # update rubygems Software
Gem install rake # Install rake from a local or remote server
Gem install rake -- remote # Install rake from a remote server
Gem install watir-V (or -- version) 1.6.2 # specify
Gem uninstall rake # uninstall the rake package
Gem List D # list local packages with D Headers
Gem query-n'' [0-9] ''-- local # search for packages with numbers on the local device.
Gem search log -- both # search for packages containing log strings from local and remote servers
Gem search log -- remoter # search for packages containing log strings only on the remote server
Gem search-r log # search for packages containing log strings only on the remote server
Gem help # Wake-up help
Gem help install # list the install Command help
Gem help examples # list some examples of using the gem command
Gem build rake. gemspec # compile rake. gemspec into rake. Gem
Gem check-v pkg/rake-0.4.0.gem # Check whether rake is valid
Gem cleanup # Clear old versions of all packages and keep the latest version
Gem contents rake # display the files contained in the rake package
Gem dependency rails-V 0.10.1 # list packages that are mutually dependent on rails
Gem environment # view the gem Environment