#!/bin/bash
#
# Create dpadmin5 and set its pw on UBUNTU, RHEL, OEL & CentOS

PW=$1

#/etc/init.d/sshd restart

OSVERSION=0
UBUNTU=0
AMAZONLINUX=0
AMAZONLINUX2=0
AMAZONLINUX=`grep -c "Amazon Linux AMI" /etc/system-release`
AMAZONLINUX2=`grep -ciE "Amazon Linux release 2|Amazon Linux 2" /etc/system-release`
dpadmin5=`grep -ic dpadmin5 /etc/ssh/sshd_config`

if [ -f /etc/redhat-release ];then
	OSVERSION=`awk -F \. '{print $1}' /etc/redhat-release | awk '{print $NF}'`
else
	if [ -e /usr/bin/lsb_release ];then
		UBUNTU=`lsb_release -d | grep -ic ubuntu`
	else
		echo "probably not Ubuntu."
	fi
fi

###########################################
if [ $OSVERSION -eq 6 ];then
	for newusers in dpadmin5
	do
		awk -F: '{print $1}' /etc/passwd | grep ^$newusers$
		if [ $? -eq 1 ];then
			useradd $newusers -d /home/dpadmin5 -m
			usermod -a -G ssh_access $newusers
			usermod -a -G wheel $newusers
			chage -I -1 -m 7 -M -1 -E -1 $newusers
		else
			chage -I -1 -m 7 -M -1 -E -1 $newusers
		fi
	done
	echo "dpadmin5:$PW" | chpasswd; history -c
	if [ $dpadmin5 -eq 0 ];then
		cat << EOF >> /etc/ssh/sshd_config
#
Match User dpadmin,dpadmin2,dpadmin3,dpadmin5
PermitEmptyPasswords no
PasswordAuthentication yes
### Please insert your configuration above the "Match" line, no configuration can be added after this line.
EOF
##
fi
/etc/init.d/sshd restart
fi

###########################################
if [ $AMAZONLINUX -eq 1 ];then
	for newusers in dpadmin5
	do
		awk -F: '{print $1}' /etc/passwd | grep ^$newusers$
		if [ $? -eq 1 ];then
			useradd $newusers -d /home/dpadmin5 -m
			usermod -a -G ssh_access $newusers
			usermod -a -G wheel $newusers
			chage -I -1 -m 7 -M -1 -E -1 $newusers
		else
			chage -I -1 -m 7 -M -1 -E -1 $newusers
		fi
	done
	echo "dpadmin5:$PW" | chpasswd; history -c
	if [ $dpadmin5 -eq 0 ];then
		cat << EOF >> /etc/ssh/sshd_config
#
Match User dpadmin,dpadmin2,dpadmin3,dpadmin5
PermitEmptyPasswords no
PasswordAuthentication yes
### Please insert your configuration above the "Match" line, no configuration can be added after this line.
EOF
##
fi
/etc/init.d/sshd restart
fi


###########################################
if [ $UBUNTU -eq 1 ];then
	for newusers in dpadmin5
	do
		awk -F: '{print $1}' /etc/passwd | grep ^$newusers$
		if [ $? -eq 1 ];then
			useradd $newusers -d /home/dpadmin5 -m
			usermod -a -G ssh_access $newusers
			usermod -a -G wheel $newusers
			chage -I -1 -m 7 -M -1 -E -1 $newusers
		else
			chage -I -1 -m 7 -M -1 -E -1 $newusers
		fi
	done
	## this is for rhel6 or ubuntu or Amazon Linux
	echo "dpadmin5:$PW" | chpasswd; history -c
	## this is for rhel6 or ubuntu or Amazon Linux
	if [ $dpadmin5 -eq 0 ];then
		cat << EOF >> /etc/ssh/sshd_config
#
Match User dpadmin,dpadmin2,dpadmin3,dpadmin5
PermitEmptyPasswords no
PasswordAuthentication yes
### Please insert your configuration above the "Match" line, no configuration can be added after this line.
EOF
##
/etc/init.d/ssh restart
##
fi
fi

###########################################
if [ $OSVERSION -eq 7 -o $AMAZONLINUX2 -eq 1 ];then
	## this is for rhel7 / Amazon Linux 2
	for newusers in dpadmin5
	do
		awk -F: '{print $1}' /etc/passwd | grep ^$newusers$
		if [ $? -eq 1 ];then
			useradd $newusers -d /home/dpadmin5 -m
			usermod -a -G ssh_access $newusers
			usermod -a -G wheel $newusers
			chage -I -1 -m 7 -M -1 -E -1 $newusers
		else
			chage -I -1 -m 7 -M -1 -E -1 $newusers
		fi
	done
	## 7.2
	echo "dpadmin5:$PW" | chpasswd; history -c
	## 7.3
	if [ $dpadmin5 -eq 0 ];then
		cat << EOF >> /etc/ssh/sshd_config
#
Match User dpadmin,dpadmin2,dpadmin3,dpadmin5
PermitEmptyPasswords no
PasswordAuthentication yes
### Please insert your configuration above the "Match" line, no configuration can be added after this line.
EOF
systemctl reload sshd
fi
#
fi