How to create multiple users in Linux

How to create multiple users in Linux

@! /Bin/sh (definition uses sh shell)
Groupadd users (create a user group)
@ T_class code (define the first parameter as the code of the total group and assign the variable "t_class ")
T_class = $1
@ Class code (defines the second parameter as the group code and assigns the variable "num_class ")
Num_class = 'expr $2 + 0'
If (test $ num_class-le 9) (The following Code ensures that the number of digits in the grouping code is two digits)
Then
Num_class = "0" $ num_class
Fi
@ Max user ID (define the third parameter as the maximum ID of the group user and assign the variable "max_stid ")
Max_stid = 'expr $3 + 0'
@ Init user ID (the user ID of this group starts from 1)
Num_userid = 1
@ Mkdir User Home (create a public directory named "FST" for all users in the "/home" Directory)
If [! -X/home/Fst]
Then
Mkdir/home/Fst
Fi
If [! -X/home/Fst/$1 $ num_class] (create a directory named after the group code for each group under the common directory of the Group)
Then
Mkdir/home/Fst/$1 $ num_class
Fi
While (test $ num_userid-Le $ max_stid) (starts from user ID 1 until the maximum ID)
Do
If (test $ num_userid-le 9) (The following ensures that the number of digits in the user code is two digits)
Then
Num_userid = "0" $ num_userid
Fi
User_name = $ t_class $ num_class $ num_userid (the username is merged into three code groups: Total group, group, and user ID, and the user_name variable is assigned)
@ Save User passwd to file user_pwlist (append the "user_pwlist" file row by row in the format of "Name: passwd" for initializing the user password)
Echo $ user_name ":" $ user_name> user_pwlist
@ Add user (create the user and assign the "users" group to create the user directory)
Adduser-G users-D/home/Fst/$1 $ num_class/$ user_name
@ Set quota (set the quota for this user. The maximum capacity is 20 mb and there is no limit on the number of files)
Setquota-U $ user_name 10240 20480 0 0/home
@ Set Directory mode (set the permission of the user directory to 755)
Chmod 755/home/Fst/$1 $ num_class/$ user_name
@ Current user ID add one (add 1 to the user ID, prepare for the next cycle, and create the next user)
Num_userid = 'expr $ num_userid + 1'
Done
Chpasswd <user_pwlist (the following two actions are used to set passwords for all users just created)
Pwconv
Rm user_pwlist-F (delete the "user_pwlist" file)