Somewhere on the Internet I found this: The syntax to configure user privileges is as follows:user_list host_list=effective_user_list tag_list command_listWhere:user_list  list of users or a user alias that has already been set.host_list  list of hosts or a host alias on which users can run sudo.effective_user_list  list of users they must be running as or a run as alias.tag_list  list of tags such as NOPASSWD.command_list  list of commands or a command alias to be run by user(s) using sudo.To allow a user (aaronkilik in the example below) to run all commands using sudo without a password, open the sudoers file: ...So this explains the syntax of a visudo entry like someuser ALL=(ALL) NOPASSWD: ALLWhat would you tell a new Linux user to explain the effective_user_list part of the syntax?Is there an explanation that is easy enough to understand and remember the difference between  the list of users in the command and the list of effective users in there . Maybe an easy one liner?The explanation in here:effective_user_list  list of users they must be running as or a run as alias.is not clear enough to me!
visudo syntax good explanation for effective_user_list
security;sudo;sudoedit