How to create a new user in Linux. Code to insert after "$" symbol

newusercreate.sh

mami@mami:~$ sudo useradd testinguser
mami@mami:~$ sudo passwd testinguser
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
mami@mami:~$ sudo ls -l /home
total 20
drwxr-xr-x 55 alaa alaa  4096 Aug 22 22:00 alaa
drwx------  2 root root 16384 Jun  5 09:46 lost+found
mami@mami:~$ sudo mkdir /home/testinguser
mami@mami:~$ sudo chown testinguser:testinguser /home/testinguser
mami@mami:~$ ls -l /home
total 24
drwxr-xr-x 55 alaa        alaa         4096 Aug 22 22:00 alaa
drwx------  2 root        root        16384 Jun  5 09:46 lost+found
drwxr-xr-x  2 testinguser testinguser  4096 Aug 23 10:03 testinguser
mami@mami:~$ ls -l /home/testinguser/
total 0
mami@mami:~$ sudo chsh -s /biKn/bash testinguser