1 - Create User Account

#!/bin/bash

echo "Please provide a username?"
read u
echo

useradd $u
echo $u account has been created

====================================================

2 - Error out if user exist
 #!/bin/bash

echo "Please provide a username?"
read u
echo

grep -q $u /etc/passwd
        if [ $? -eq 0 ]
        then
        echo ERROR -- User $u already exist
        echo Please choose another username
        echo
        exit 0
        fi

useradd $u
echo $u account has been created

====================================================

3 - Add user description
#!/bin/bash

echo "Please provide a username?"
read u
echo

grep -q $u /etc/passwd
        if [ $? -eq 0 ]
        then
        echo ERROR -- User $u already exist
        echo Please choose another username
        echo
        exit 0
        fi


echo "Please provide user description?"
read d
echo

useradd $u -c "$d"
echo $u account has been created

====================================================

4 - Add User ID
#!/bin/bash

echo "Please provide a username?"
read u
echo

grep -q $u /etc/passwd
        if [ $? -eq 0 ]
        then
        echo ERROR -- User $u already exist
        echo Please choose another username
        echo
        exit 0
        fi


echo "Please provide user description?"
read d
echo

echo "Do you want to specify user ID (y/n)?"
read ynu
echo
        if [ $ynu == y ]
        then
        echo "Please enter UID?"
        read uid

        useradd $u -c "$d" -u $uid
        echo
        echo $u account has been created

        elif [ $ynu == n ]
        then
        echo No worries we will assign a UID
        useradd $u -c "$d"
        echo
        echo $u account has been created
        fi

====================================================

5 - Add User ID check
#!/bin/bash

echo "Please provide a username?"
read u
echo

grep -q $u /etc/passwd
        if [ $? -eq 0 ]
        then
        echo ERROR -- User $u already exist
        echo Please choose another username
        echo
        exit 0
        fi


echo "Please provide user description?"
read d
echo

echo "Do you want to specify user ID (y/n)?"
read ynu
echo
        if [ $ynu == y ]
        then
        echo "Please enter UID?"
        read uid
                grep -q $uid /etc/passwd
                if [ $? -eq 0 ]
                then
                echo ERROR -- UserID $uid already exist
                echo
                exit 0
                else
                useradd $u -c "$d" -u $uid
                echo
                echo $u account has been created
                fi
        elif [ $ynu == n ]
        then
        echo No worries we will assign a UID
        useradd $u -c "$d"
        echo
        echo $u account has been created
        fi