Linux: newuser.sh

newuser.sh

#!/bin/sh

# Script to add a user to Linux system
if [ $(id -u) -eq 0 ]; then
        read -p "Enter username : " username
        read -p "Enter userkey : " userkey
        egrep "^$username" /etc/passwd >/dev/null
        if [ $? -eq 0 ]; then
                echo "$username exists!"
                exit 1
        else
                useradd -g users -m -d /home/$username -s /bin/bash $username
                [ $? -eq 0 ] && echo "User has been added to system!" || echo "Failed to add a user!"
                mkdir /home/$username/.ssh
                [ $? -eq 0 ] && echo ".ssh dir Ok" || echo ".ssh dir FAIL"
                chmod 700 /home/$username/.ssh
                chmod 755 /home/$username
                touch /home/$username/.ssh/authorized_keys
                chmod 600 /home/$username/.ssh/authorized_keys
                chown -R $username: /home/$username

                echo $userkey >> /home/$username/.ssh/authorized_keys
                [ $? -eq 0 ] && echo "User Key copied" || echo "User key could not be copied"
        fi
else
        echo "Only root may add a user to the system"
        exit 2
fi