Automate adding new SFTP chrooted accounts

add-sftp-user

#!/usr/bin/env bash

# Automate adding new SFTP accounts (chrooted)
# --------------------------------------------------------------------------------
#

if [ $# == 0 ]; then
    echo "Usage: add-sftp-user EMAILS "
    echo "Automates adding a SFTP user account, delagating all tasks and sending confirmation email."
else
    # Main variables
    emails=$@
    home_dir="/ftp"
    sftp_home="/home/sftpuser"

    # Create account for each email passed
    for email in ${emails[@]}; do

            # Get username from email address and ask for name input
            user=$(echo "$email" | awk -F"@" '{print $1}')
            read -p "Name: " NAME

            user_home="${sftp_home}/${user}"

            echo "Adding user -- ${user}"
            sudo useradd ${user} -c "${NAME}" -s /usr/libexec/openssh/sftp-server -d "${user_home}" -G sftpuser

            echo "Creating chrooted home"
            chrooted_home="${user_home}/ftp"
            sudo mkdir ${chrooted_home}
            sudo usermod -d /ftp ${user}

            echo "Applying ownership and permissions for chrooted account"
            sudo chown root:root ${user_home}
            sudo chmod 755 ${user_home}
            sudo chown ${user}:ftp ${chrooted_home}
            sudo chmod 770 ${chrooted_home}

            echo "Finished setting up account! Account created for: ${user}"

            #===================================================================
            echo "Sending email to ${user}"
            MAILTO="${email}"
            BC=""
            SUBJECT="SFTP Account Created"

            # Substitute variables in email template
            BODY=$(sed -e "s/{USER}/${NAME}/g" < ~/templates/SFTPemail.txt)
            BODY=$(echo -e $BODY | sed -e "s/{USERNAME}/${user}/g")

            # Send email
            echo -e "$BODY" | mail -s "$SUBJECT" -b "$BC" -r "$BC" $MAILTO
    done
    echo "DONE!"
fi