∞Sudo

Sudo is a program for Unix-like computer operating systems that allows users to run programs with the security privileges of another user (normally the superuser, or root). Its name is a concatenation of the su command (which grants the user a shell of another user, normally the superuser) and "do", or take action.

By default, when you use sudo your current shell environment is not passed through to the session created by it, but RVM already allows for easier access to sudo calls with rvmsudo. However, sudo's defaults are very strict and you might end up getting password prompts on commands that are set to use the sudo NOPASSWD directive.

Changing sudo's strict defaults

There are 3 things needed to mitigate this situation if you encounter it:

the user that is invoking sudo must have export rvmsudo_secure_path=0 set on his shell environment (think .bashrc, .bash_profile or .zshrc)
comment out Defaults secure_path=... on /etc/sudoers
add Defaults env_keep +="rvm_bin_path GEM_HOME IRBRC MY_RUBY_HOME rvm_path rvm_prefix rvm_version GEM_PATH rvmsudo_secure_path RUBY_VERSION rvm_ruby_string rvm_delete_flag" to /etc/sudoers in rare cases it is required to add more variables - they should be reported by first run of rvmsudo.

After these changes, you should be able to use rvmsudo preserving the same password/no-password directives as "normal" sudo calls.

∞Community Resources

The sudo description copied from sudo wiki
You can learn more about sudo at the official website