Run a specific process that requires a user
Each user had to have an owner
Each process requires a user runtime bindings
When different users perform different operations command file, because authority is inconsistent, inconsistent results will
View user information, id command
View user's owner
Red is the owner
username to view running processes
User group related files
User Info
Password information
Group Information
passwd file
Line is a user
Each row of content
shadow
group
A list of members of the group: Group name: Password placeholder: Group ID
View format by helping
Agreement, does not have the force of law
User id agreement
About the root user
