Explanation of gem commands in Ruby learning notes

Ruby-v # view the ruby VERSION ruby-e '''require "watir"; puts Watir: IE: version'' # view the watir VERSION

Rvm list known # list known ruby versions

Rvm install 1.9.3

Rvm use 1.9.3 | rvm use system

Rvm use 1.9.3 -- default

Rvm list # list local ruby versions

Rvm remove 1.9.2

For details, see RVM practical guide https://ruby-china.org/wiki/rvm-guide.

Gem-v # gem version

Gem source # gem Resources

Gem sources-a url | gem sources-r url # add or delete a configuration source from gem

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