Usage of the sudo command in linux

In linux, the user name and password added during system installation are used by default to log on, so the login account permission is used for operations.

To obtain the permissions of the root user of the system for operations, use the "sudo + command"

After a sudo call, the root permission is lost. Therefore, to use the root user permission, you must add sudo each time.

For example: sudo apt-get install package_name install/update a deb package

Reference: http://www.cnblogs.com/holynn/archive/2009/05/04/1448658.html