Linux User and file Rights management

W.H.O.

-A print all that can be printed
-D Print dead process
-M with AM I,mom likes
-Q Print The current number of logged in users and user name
-U print current logged in user login information
-R print Run level

su,su-and Sudo

su <user>You can switch to users user, you need to enter the password of the target user, sudo <cmd> you can run the cmd command at the privilege level, you need the current user to be a sudo group, and you need to enter the current user's password. The su - <user> command also switches the user, and the environment variable is changed to the target user's environment variable.

New User/user group

sudo useradd Jason New user

Groups Jason or Cat/etc/group see which group the user belongs to

sudo usermod-g sudo Jason adds Jason user to sudo group

sudo deluser jason--remove-home Delete user

sudo chown Jason Iphone6 modify file Owner

CP Iphone6/home/jason copy files to Jason home directory

chmod iphone6 or chmod go-rw iphone6 Modify user rights

Useradd only create the user, created with passwd Lilei to set the new user's password. AddUser will create a user, create a directory, create a password (prompting you to set up), do this series of operations. In fact, Useradd, userdel such operations more like a command, after the execution of the return. And adduser more like a program, you need to enter, determine a series of operations.

Linux User and file Rights management