Linux sleep command help

Thank you for your solution but I need to run this sleep process in background of the program.

#!/bin/bash

echo "Enter e-mail of requester:"
read fname1

echo "Enter number hours to enable debug :"
read fname2

#shopt -s nullglob
#rm -rf /rezsystem/rezadmin/Log4J/node1/log4jstat.txt
#echo enable > /rezsystem/rezadmin/Log4J/node1/log4jstat.txt

#Debug enable start

#cp /rezsystem/rezadmin/Log4J/Logs/Debug_Mode/Jboss_Conf/node1/log4j.xml /rezsystem/jboss/jboss1/server/default/conf
#cd /rezsystem/jboss/jboss1/server/default/conf
#chown rezuser log4j.xml
#chgrp rezuser log4j.xml
#chmod 775 log4j.xml

#find /rezsystem/jboss/jboss_1/server/default/deploy/ -name "log4j.xml" -type f -exec sed -i 's/priority value="WARN"/priority value="DEBUG"/' {} \;
#find /rezsystem/jboss/jboss_1/server/default/deploy/ -name "log4j.xml" -type f -exec sed -i 's/param name="Threshold" value="WARN"/param name="Threshold" value="DEBUG"/' {} \;

echo "" | mail -s "This is to inform that ONS has enabled DEBUG in Node2 log4j - "$(hostname) $fname1 < /tmp/email.txt

#Debug enable stop

#Jboss Start

#NOWDATE=$(date +"%m-%d-%Y_%H%M")
#zip /var/log/rezg/sys/server1.log_$NOWDATE.zip /var/log/rezg/sys/server1.log
#zip /var/log/rezg/app/rezg_app1.log_$NOWDATE.zip /var/log/rezg/app/rezg_app1.log

#cd /rezsystem/jboss/jboss1/server/default
#rm -r -f work/
#rm -r -f tmp/
#cd /rezsystem/jboss/jboss1/bin
#./run.sh &

#Jboss started

sleep ${fname2}m

#Debug disable start

#cp /rezsystem/rezadmin/Log4J/Logs/Live_Mode/Jboss_Conf/node1/log4j.xml /rezsystem/jboss/jboss1/server/default/conf
#cd /rezsystem/jboss/jboss1/server/default/conf
#chown rezuser log4j.xml
#chgrp rezuser log4j.xml
#chmod 775 log4j.xml

#find /rezsystem/jboss/jboss1/server/default/deploy/ -name "log4j.xml" -type f -exec sed -i 's/priority value="DEBUG"/priority value="WARN"/' {} \;
#find /rezsystem/jboss/jboss1/server/default/deploy/ -name "log4j.xml" -type f -exec sed -i 's/param name="Threshold" value="DEBUG"/param name="Threshold" value="WARN"/' {} \;

#echo disable > /rezsystem/rezadmin/Log4J/node1/log4jstat.txt

#Debug Disable stop

#Jboss Start

#NOWDATE=$(date +"%m-%d-%Y_%H%M")
#zip /var/log/rezg/sys/server1.log_$NOWDATE.zip /var/log/rezg/sys/server1.log
#zip /var/log/rezg/app/rezg_app1.log_$NOWDATE.zip /var/log/rezg/app/rezg_app1.log

#cd /rezsystem/jboss/jboss1/server/default
#rm -r -f work/
#rm -r -f tmp/
#cd /rezsystem/jboss/jboss1/bin
#./run.sh &

echo "" | mail -s "OnS has disabled Debug for Node 1 - "$(hostname) $fname1

Above is my code. Since this it has a sleep command during the execution of this script it holds without coming to the prompt. so at that time no one can work on that terminal. So I need run this sleep process in background.