1. Users and groups
1.1 File owner
1.2 Groups
1.3 Others
su -: switch to root user
exit: exit the current user identity
ls -al: Display the file name and all permissions and attributes of the file
1. Users and groups
1.1 File owner
1.2 Groups
1.3 Others
su -: switch to root user
exit: exit the current user identity
ls -al: Display the file name and all permissions and attributes of the file