Script operations management system

! # / bin / bash
#author: ELIN
#date: 2019.8.27
#title: user management system

User page #
# input command
the while to true
do
echo "============================ // \\"
echo "| user management system | "
echo" -------------------------------- "
echo" | 1, create a user | "
echo" | 2 , delete users | "
echo" | 3, lock the user | "
echo" | 4, unlock the user | "
echo" | 5, view the user | "
echo" | 6, exit the script | "
echo" ------- ------------------------- "
the Read -p" Please enter your OS choice: "AA
IF [$ AA -eq 1]
the then
       {the Read -p "Please enter your username:" bb
        [ -d /home/$bb ]
        if  [ $? -eq 0 ]
        then
                echo "User already exists, please enter the correct user name !!"
        the else
                useradd $ bb
                the Read -p "Please enter your password:" CC
                echo "$ CC" | passwd --stdin $ bb &> / dev / null
 echo "password successfully"
        fi}

elif [$ AA -eq 2]
the then
        the Read -p "Please enter the user name you want to delete:" bb
        [-d / Home / $ bb]
        IF [? $ -eq 0]
        the then
                userdel -r $ bb
                echo "User deleted "
        the else
                  echo" to delete the user does not exist, enter the correct user name !! "
          fi

Please enter the correct user name! ! "




















        elif [$ (the passwd -S BB $ | awk '{2} Print $' D) = "LK"]
        the then
                  the passwd -u BB & $> / dev / null
                echo "successful user unlocks"
        the else
                echo "User unlocked"
          Fi
elif [$ AA -eq 5]
the then
        the Read -p "Please enter the user name you want to see:" bb
        [-d / Home / $ bb]
        IF [$ -eq 0?]
        the then
                finger $ bb
        the else
                echo "user does not exists, enter the correct user name !! "
        fi
the else
        echo" You have to exit the script "    
    BREAK
fi
DONE