Understanding Linux Permissions

First, let's look at the users and user groups of the Linux system

Scenario: There are two project groups in the company: Group A and group B;a, B, c are members of Group A, and B are members of Group A. For the sake of secrecy, the progress, documentation and procedures of the group are made public within the group. In Group A, for example, members of the group can view each other's files, but members of the group have their own drawers with their own privacy files, which are not allowed to be seen (drawers are locked). The person in Group B is the other person in relation to group A. If the Members ' consent is not met, the information of a, B or C is not visible. There is a boss in charge, who has the power to do everything (including checking the user's drawer).

Understanding Linux Permissions