sftpchroot.sh

#!/bin/bash

if [ $(whoami) != 'root' ] 2> /dev/null;then
	echo ' [X] Need r00t!'
	exit
fi

if [ $(cat /etc/group | grep sftpusers) -z ] 2> /dev/null;then
	groupadd sftpusers
fi

if [ $(cat /etc/ssh/sshd_config | grep 'Match Group sftpusers') -z ] 2> /dev/null;then	
	sed -i 's/^Subsystem/#Subsystem/g' /etc/ssh/sshd_config
	echo -e "\n#Setup for chroot sftpusers\n\nSubsystem sftp internal-sftp\nMatch Group sftpusers\n\tChrootDirectory /sftp/%u\n\tForceCommand internal-sftp"
fi

read -p ' [>] Enter the name for the user: ' SUSER

if [ $(cat /etc/passwd | grep $SUSER) -z ] 2> /dev/null;then
	echo " [*] user $SUSER ok."
	echo
else
	echo " [X] user $SUSER already exists."
	exit
fi

useradd -g sftpusers -d /incoming -s /sbin/nologin $SUSER
echo -e " [>] Enter the password for $SUSER:\n"
passwd $SUSER
mkdir -p /sftp
mkdir -p /sftp/$SUSER
mkdir -p /sftp/$SUSER/incoming
chown $SUSER:sftpusers /sftp/$SUSER/incoming
service ssh restart
echo -e "\n [>] All done, user $SUSER added to chroot jail at /sftp/$SUSER"