CentOS: Java & Tomcat Installation

Install Java 1.6.0_20:
 
The following instructions assume that there is no root access to the system. Thus, Java must be made available in a home directory of user named webadmin.
 
Download the file:
cd ~
wget http://software.cs.utep.edu/LINUX/Java/jdk-6u20-linux-x64.bin
 
Set execution permissions:
chmod +x jdk-6u20-linux-x64.bin
 
Install:
# sh jdk-6u20-linux-x64.bin
./jdk-6u20-linux-x64.bin
 
Install Tomcat:
cd ~
wget https://archive.apache.org/dist/tomcat/tomcat-5/v5.5.35/bin/apache-tomcat-5.5.35.tar.gz
tar -xzvf apache-tomcat-5.5.35.tar.gz
mv apache-tomcat-5.5.35 ~/webserver
rm apache-tomcat-5.5.35.tar.gz
Set environment:
vim ~/webserver/bin/setenv.sh
— paste these lines —
JAVA_HOME=/home/webadmin/jdk1.6.0_20/
JRE_HOME=/home/webadmin/jdk1.6.0_20/jre
 
—- alternative —-
Create a symlink for Tomcat pointing toward Java directory:
ln -s /home/webadmin/jdk1.6.0_20 /home/webadmin/pkg/share/jre180131
 
OR Add Java into the Bash Profile
vim ~/.bash_profile
PATH=$PATH:$HOME/jdk1.6.0_20
export JAVA_HOME=/home/webadmin/jdk1.6.0_20
export PATH
=== didn’t work ===
vim ~/webserver/bin/startup.sh
# JAVA_HOME for Tomcat  
JAVA_HOME = /home/webadmin/jdk1.6.0_20  
JRE_HOME = /home/webadmin/jdk1.6.0_20/jre  
export JAVA_HOME  
export JRE_HOME
 
vim ~/webserver/bin/shutdown.sh
# JAVA_HOME for Tomcat  
JAVA_HOME = /home/webadmin/jdk1.6.0_20  
JRE_HOME = /home/webadmin/jdk1.6.0_20/jre  
export JAVA_HOME  
export JRE_HOME
=== didn’t work ===
 
Start Tomcat:
~/webserver/bin/startup.sh
 
Check running status:
wget http://127.0.0.1:8080
tail ~/webserver/logs/catalina.out
 
Set Tomcat administration access:
vim ~/webserver/conf/tomcat-users.xml
 
Edit Crontab for autorun:
crontab -e
Add this line:
@reboot /home/webadmin/webserver/bin/startup.sh
 
Script to send an email if Tomcat Is Not running:
kill -0 `cat $CATALINA_PID` > /dev/null 2>&1
if [ $? -gt 0 ]
then
echo “Check tomcat” | mailx -s “Tomcat not running” support@kimconnect.com
fi
 

The following requires root privileges:
 
Create a Tomcat control script at startup directory:
vim /etc/init.d/tomcat
 
#! / bin / bash  
# chkconfig: 234 20 80  
# description: Tomcat Server basic start / shutdown script  
# processname: tomcat  
JAVA_HOME = /home/webadmin/jdk1.6.0_20  
export JAVA_HOME
TOMCAT_HOME = /home/webadmin/webserver/bin/  
START_TOMCAT = /home/webadmin/webserver/bin/startup.sh  
STOP_TOMCAT = /home/webadmin/webserver/bin/shutdown.sh  
start () {  
        echo -n “Starting tomcat:”  
        cd $ TOMCAT_HOME  
        $ {START_TOMCAT}  
        echo “done.”  
}  
stop () {  
        echo -n “Shutting down tomcat:”  
        cd $ TOMCAT_HOME  
        $ {STOP_TOMCAT}  
– 4 out of 5 –  
        echo “done.”  
}  
case “$ 1” in  
start)  
        start  
        ;;  
stop)  
        stop  
        ;;
 
        start  
        ;;  
*)  
        echo “Usage: $ 0 {start | stop | restart}”  
esac  
exit 0  
 
Configure system to automatically start Tomcat:
chkconfig –add tomcat  
chkconfig -level 234 tomcat on

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