Linux Learning-User enhancement and deletion check related operations

Useradd Add/create User

Userdel-r Deleting a user

ID Shizhengwen View User (Shizhengwen is user name)

usermod-d Modify the user's profile in the home directory, after the modification also need to copy the original home directory of the configuration file, otherwise it will not be able to log on the user (equivalent to re-create a new home directory file, the file is empty)

Usermod-g group1 user1 The user user1, joins in group1 this group,

Note that the newly added group here is the sub-group, which is the form of the overlay, meaning that if you add group2 again, the user User1 group is the default join group and group2, Group2 will group1 overwrite

Usernod-ag This is added meaning, is appended to the form, not the cover form.

Linux Learning-User enhancement and deletion check related operations