David Ghedini

Linux, Java, Oracle, and PostgreSQL


David Ghedini

Tuesday Aug 14, 2012

Apache TomEE on CentOS 6

This post will cover installing Apache TomEE on CentOS 6.x

TomEE is a certified implementation of the Java EE 6 Web Profile.

What is most interesting is that it is build on top of Tomcat 7. Literally. Nothing has been removed from Tomcat 7, only added to.

Installation is quite identical to Tomcat 7 and you can even deploy TomEE as a WAR from within an existing Tomcat 7.x installation.

I wasn't keen on this option as the overall directory structure, jar locations, conf files, etc...are different from the apache-tomee-1.0.0-webprofile package layout, which we will be installing below.

Conversely, it could be an option to consider as apache-tomee-1.0.0-webprofile is packaged with Tomcat 7.0.27 (current stable is 7.0.29).

There is also a TomEE Plus package with additional features, but this is not Java EE6 certified. Installation of TomEE Plus is identical to Web Profile below, just change the file names.

Below, we'll install TomEE and configure it to run as a service. To see how to run TomEE as an unprivileged user, Manager configuration, run on port 80, etc, etc...please see my Tomcat 7 Installation post

To begin, we'll need to install the Java Development Kit (JDK) 6




Step 1: Install JDK 1.6 latest



You can download the latest JDK here: http://www.oracle.com/technetwork/java/javase/downloads/index.html

We'll install the latest JDK, which is JDK 6, Update 33.

For CentOS 64 bit, I'll be using jdk-6u33-linux-x64.bin (for 32 bit, use jdk-6u33-linux-i586.bin)

Download jdk-6u33-linux-x64.bin and save it the /opt directory.

[root@demo3 opt]# ls
jdk-6u33-linux-x64.bin


Creating a new directory /usr/java:

[root@demo3 opt ]# mkdir /usr/java  


Change to the /usr/java directory we created

[root@demo3 opt ]# cd /usr/java  
[root@demo3 java ]# 


Execute the bin file using 'sh /opt/jdk-6u33-linux-x64.bin' (if you saved jdk-6u33-linux-x64.bin to a location other than /opt, adjust accordingly)

[root@demo3 java]# sh /opt/jdk-6u33-linux-x64.bin


This will create the directory /usr/java/jdk1.6.0_33. This will be our JAVA_HOME.


We can now set JAVA_HOME and put Java into the path of our users.

To set the JAVA_HOME, add below to the .bash_profile of root (you can do the same for user tomcat - or any other user - later if you decide to run it under a non-privileged user).
JAVA_HOME=/usr/java/jdk1.6.0_33
export JAVA_HOME
PATH=$JAVA_HOME/bin:$PATH
export PATH


Once you have added the above to .bash_profile, issue '. ~/.bash_profile' as shown below. Or you can simply log out and log back in.

[root@demo3 ~]#  . ~/.bash_profile


Verify that Java is now in your path by issuing 'echo $JAVA_HOME'

[root@demo3 ~]# echo $JAVA_HOME
/usr/java/jdk1.6.0_33


You can also issue 'java -version' to check that Java is available to your user.

[root@demo3 ~]# java -version
java version "1.6.0_33"
Java(TM) SE Runtime Environment (build 1.6.0_33-b04)
Java HotSpot(TM) 64-Bit Server VM (build 20.8-b03, mixed mode)


Step 2: Download and Unpack Apache TomEE 1.0.0 (or latest)



We will install TomEE under /usr/share.

Switch to the /usr/share directory:

[root@demo3 ~]# cd /usr/share
[root@demo3 share ]# 
Download apache-tomee-1.0.0-webprofile.tar.gz (or the latest version) here

and save it to /usr/share

unpack the file using tar -xzf:

[root@demo3 share ]# tar -xzf apache-tomee-1.0.0-webprofile.tar.gz 
This will create the directory /usr/share/apache-tomee-webprofile-1.0.0

This will be the home directory for TomEE


Step 3: Configure TomEE to Run as a Service.



Create a simple Start/Stop/Restart for TomEE.

Change to the /etc/init.d directory and create a script called 'tomee' as shown below.

[root@demo3 share]# cd /etc/init.d
[root@demo3 init.d]# vi tomee
And here is the script we will use.

#!/bin/bash
# description: TomEE Start Stop Restart
# processname: tomee
# chkconfig: 234 20 80
JAVA_HOME=/usr/java/jdk1.6.0_33
export JAVA_HOME
PATH=$JAVA_HOME/bin:$PATH
export PATH
CATALINA_HOME=apache-tomee-webprofile-1.0.0

case $1 in
start)
sh $CATALINA_HOME/bin/startup.sh
;; 
stop)   
sh $CATALINA_HOME/bin/shutdown.sh
;; 
restart)
sh $CATALINA_HOME/bin/shutdown.sh
sh $CATALINA_HOME/bin/startup.sh
;; 
esac    
exit 0
You can adjust your script according to your needs.

Make the script executable:

[root@demo3 init.d]# chmod 755 tomee
Add to chkconfig with run levels 234 (or whatever you prefer)

[root@demo3 init.d]# chkconfig --add tomee
[root@demo3 init.d]# chkconfig --level 234 tomee on
Verify it:

[root@demo3 init.d]# chkconfig --list tomee
tomee          0:off   1:off   2:on    3:on    4:on    5:off   6:off
Test the script.

Start TomEE:
[root@demo3 ~]# service tomee start
Using CATALINA_BASE:   /usr/share/apache-tomee-webprofile-1.0.0
Using CATALINA_HOME:   /usr/share/apache-tomee-webprofile-1.0.0
Using CATALINA_TMPDIR: /usr/share/apache-tomee-webprofile-1.0.0/temp
Using JRE_HOME:        /usr/java/jdk1.6.0_33
Using CLASSPATH:       /usr/share/apache-tomee-webprofile-1.0.0/bin/bootstrap.jar:/usr/share/apache-tomee-webprofile-1.0.0/bin/tomcat-juli.jar
Check if the Tomcat Manager page is visible at http://yourIPaddress:8080. If not check your firewall and logs.

Stop TomEE:

[root@demo3 ~]# service tomee stop
Using CATALINA_BASE:   /usr/share/apache-tomee-webprofile-1.0.0
Using CATALINA_HOME:   /usr/share/apache-tomee-webprofile-1.0.0
Using CATALINA_TMPDIR: /usr/share/apache-tomee-webprofile-1.0.0/temp
Using JRE_HOME:        /usr/java/jdk1.6.0_33
Using CLASSPATH:       /usr/share/apache-tomee-webprofile-1.0.0/bin/bootstrap.jar:/usr/share/apache-tomee-webprofile-1.0.0/bin/tomcat-juli.jar
Review the catalina.out log located at /usr/share/apache-tomee-webprofile-1.0.0/logs/catalina.out and check for any errors.

[root@demo3 init.d]# more /usr/share/apache-tomee-webprofile-1.0.0/logs/catalina.out


Step 4 (Optional): Configure Remote Access to TomEE Console



By default, the TomEE Console is restricted via a valve to 127.0.0.1 (localhost).

You can remove or change this via the context.xml at:

/usr/share/apache-tomee-webprofile-1.0.0/webapps/tomee/META-INF/context.xml

<Context>
  <Valve className="org.apache.catalina.valves.RemoteAddrValve" allow="127\.0\.0\.1|0:0:0:0:0:0:0:1(%.*)?|^::1$" deny=""/>
</Context>


As with Tomcat 7, piping (|) is used in place of commas.


Below is a quick look at the TomEE Console screens and it's tabs:


TomEE Console Welcome Page:

TomEE Console



TomEE Console Test Page:

TomEE Console Test



TomEE Console JNDI Page:

TomEE Console JNDI



TomEE Console EJB Page:

TomEE Console EJB



TomEE Console Class Page:

TomEE Console Class



TomEE Console Invoke Page:

TomEE Console Invoke



To see how to run TomEE as an unprivileged user, Manager configuration, run on port 80, etc... please see my Tomcat 7 Installation post Related Tomcat Posts

Learn More About Apache Tomcat 7 Apache Tomcat Foundation Tomcat 7

Tomcat 7 Hosting

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Thursday May 26, 2011

Installing Tomcat 7 on Slackware 13

This entry will cover installing and configuration of Tomcat 7 on Slackware 13

It will also work for Tomcat 6.x.

We'll install the JDK, Tomcat, create a start/stop script, and configure Tomcat to run as a service and start at boot.

For this installation, we'll use Tomcat 7.0.14, the current release of Tomcat 7.

To begin, we'll install the Java Development Kit (JDK) 1.6 update 25

JDK 1.6 is the minimum JDK version required for Tomcat 7.


Step 1: Install the JDK


Download the JDK here: http://www.oracle.com/technetwork/java/javase/downloads/index.html

We'll use the latest, JDK 6 Update 25. The JDK is specific to 32 and 64 bit versions.

My Slackware box is 32 bit, so I'll need: jdk-6u25-linux-i586.bin

If you are on 32 bit, you'll need: jdk-6u25-linux-x64.bin

Download the JDK and save it to a directory. I'm saving it to /opt.


Create a new directory /usr/java.
root@slackd:~# mkdir /usr/java  

Change to the /usr/java directory we created and install the JDK using 'sh /opt/jdk-6u25-linux-i586.bin'
root@slackd:~# cd /usr/java
root@slackd:/usr/java# sh /opt/jdk-6u25-linux-i586.bin

Set the JAVA_HOME path to the location we installed our JDK above.

To set it for your current session, you can issue the following from the CLI:
root@slackd:/usr/java# JAVA_HOME=/usr/java/jdk1.6.0_25
root@slackd:/usr/java# export JAVA_HOME
root@slackd:/usr/java# PATH=$JAVA_HOME/bin:$PATH
root@slackd:/usr/java# export PATH
Step 2: Download and Unpack Tomcat 7.0.14


Download apache-tomcat-7.0.14.tar.gz here

Save the file to the /usr/share directory In the /usr/share directory, unpack the file using tar -xzf:

root@slackd:~# cd /usr/share
root@slackd:/usr/share# tar -xzf apache-tomcat-7.0.14.tar.gz  
This will create the directory /usr/share/apache-tomcat-7.0.14

Step 3: Configuring Tomcat to Run as a Service.


We will now create a simple Start/Stop/Restart script and configure Tomcat to run as a service. We will also configure Tomcat to start at boot.

Change to the /etc/rc.d directory and create a script called 'tomcat' as shown below.

root@slackd:~# cd /etc/rc.d
root@slackd:/etc/rc.d# vi rc.tomcat
#!/bin/bash
JAVA_HOME=/usr/java/jdk1.6.0_25
export JAVA_HOME
PATH=$JAVA_HOME/bin:$PATH
export PATH
CATALINA_HOME=/usr/share/apache-tomcat-7.0.14

case $1 in
start)
sh $CATALINA_HOME/bin/startup.sh
;; 
stop)   
sh $CATALINA_HOME/bin/shutdown.sh
;; 
restart)
sh $CATALINA_HOME/bin/shutdown.sh
sh $CATALINA_HOME/bin/startup.sh
;; 
esac    
exit 0
In the above script, we are simply calling the startup.sh and shutdown.sh scripts located in the Tomcat bin directory (/usr/share/apache-tomcat-7.0.14/bin).

CATALINA_HOME is the Tomcat home directory (/usr/share/apache-tomcat-7.0.14)

Now, set the permissions for your script to make it executable:

root@slackd: /etc/rc.d# chmod 755 tomcat
We can now run tomcat as a background service using: /etc/rc.d/rc.tomcat start | stop | restart

Test our script.

Start Tomcat:
root@slackd:~# /etc/rc.d/rc.tomcat start
Using CATALINA_BASE:   /usr/share/apache-tomcat-7.0.14
Using CATALINA_HOME:   /usr/share/apache-tomcat-7.0.14
Using CATALINA_TMPDIR: /usr/share/apache-tomcat-7.0.14/temp
Using JRE_HOME:        /usr/java/jdk1.6.0_25
Using CLASSPATH:       /usr/share/apache-tomcat-7.0.14/bin/bootstrap.jar:/usr/share/apache-tomcat-7.0.14/bin/tomcat-juli.jar
Stop Tomcat:

root@slackd:~# /etc/rc.d/rc.tomcat stop
Using CATALINA_BASE:   /usr/share/apache-tomcat-7.0.14
Using CATALINA_HOME:   /usr/share/apache-tomcat-7.0.14
Using CATALINA_TMPDIR: /usr/share/apache-tomcat-7.0.14/temp
Using JRE_HOME:        /usr/java/jdk1.6.0_25
Using CLASSPATH:       /usr/share/apache-tomcat-7.0.14/bin/bootstrap.jar:/usr/share/apache-tomcat-7.0.14/bin/tomcat-juli.jar
Restarting Tomcat (Must be started first):

root@slackd:~# /etc/rc.d/rc.tomcat restart
Using CATALINA_BASE:   /usr/share/apache-tomcat-7.0.14
Using CATALINA_HOME:   /usr/share/apache-tomcat-7.0.14
Using CATALINA_TMPDIR: /usr/share/apache-tomcat-7.0.14/temp
Using JRE_HOME:        /usr/java/jdk1.6.0_25
Using CLASSPATH:       /usr/share/apache-tomcat-7.0.14/bin/bootstrap.jar:/usr/share/apache-tomcat-7.0.14/bin/tomcat-juli.jar
Using CATALINA_BASE:   /usr/share/apache-tomcat-7.0.14
Using CATALINA_HOME:   /usr/share/apache-tomcat-7.0.14
Using CATALINA_TMPDIR: /usr/share/apache-tomcat-7.0.14/temp
Using JRE_HOME:        /usr/java/jdk1.6.0_25
Using CLASSPATH:       /usr/share/apache-tomcat-7.0.14/bin/bootstrap.jar:/usr/share/apache-tomcat-7.0.14/bin/tomcat-juli.jar
You should review the Catalina.out log located at /usr/share/apache-tomcat-7.0.14/logs/catalina.out and check for any errors.

You should now be able to access Tomcat at:

http://yourdomain.com:8080 or http://yourIPaddress:8080 and we should see the Tomcat home page.
FInally, to enable Tomcat to start at boot time, add the following lines to /etc/rc.local:
if [ -x /etc/rc.d/rc.tomcat ]; then
/etc/rc.d/rc.tomcat start
Related Tomcat Posts

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Friday Mar 04, 2011

Install Tomcat 6 on CentOS or RHEL

This post will cover installation and configuration of Tomcat 6 on CentOS 5.

We will also show how to run Tomcat as a service, create a start/stop script, and configure Tomcat to run under a non-root user.

This post has been updated for Tomcat 6.0.32.

This post below will work with any Tomcat 6.x version, but I have been keeping it updated to keep the links consistent and to make it as "copying-and-paste" as possible.

If you are looking for our tutorial on installing Tomcat 7 on CentOS/RHEL, you can find it here.

This installation of Tomcat 6.0.32 was done on CentOS 5.5, but any CentOS 5.x should work, as well as RHEL and Fedora.

If you do not already have the Java Development Kit (JDK) installed on your machine, you will need to download and install the required JDK for your platform.

If you do have the JDK installed, you can skip to: Step 2: Download and Install the Tomcat 6.0.32:

Step 1: Install the JDK


You can download the JDK here: http://www.oracle.com/technetwork/java/javase/downloads/index.html

I'm using the latest, which is JDK 6, update 24. The JDK is specific to 32 and 64 bit versions.

My CentOS box is 64 bit, so I'll need: jdk-6u24-linux-x64.bin.

If you are on 32 bit, you'll need: jdk-6u24-linux-i586.bin

Download the appropriate JDK and save it to a directory. I'm saving it to /root.

Move (mv) or copy (cp) the file to the /opt directory:

[root@blanche ~]# mv jdk-6u24-linux-x64.bin /opt/jdk-6u24-linux-x64.bin  


Create a new directory /usr/java.

[root@blanche ~]# mkdir /usr/java  


Change to the /usr/java directory we created and install the JDK using 'sh /opt/jdk-6u24-linux-x64.bin'

[root@blanche ~]# cd /usr/java
[root@blanche java]# sh /opt/jdk-6u24-linux-x64.bin


Set the JAVA_HOME path. This is where we installed our JDK above.

To set it for your current session, you can issue the following from the CLI:

[root@blanche java]# JAVA_HOME=/usr/java/jdk1.6.0_24
[root@blanche java]# export JAVA_HOME
[root@blanche java]# PATH=$JAVA_HOME/bin:$PATH
[root@blanche java]# export PATH


To set the JAVA_HOME for users, we add below to the user ~/.bashrc or ~/.bash_profile of the user. We can also add it /etc/profile and then source it to give to all users.

JAVA_HOME=/usr/java/jdk1.6.0_24
export JAVA_HOME
PATH=$JAVA_HOME/bin:$PATH
export PATH


Once you have added the above to ~/.bash_profile or ~/.bashrc, you should log out, then log back in and check that the JAVA_HOME is set correctly.

[root@blanche ~]#  echo $JAVA_HOME
/usr/java/jdk1.6.0_24


Step 2: Download and Install Tomcat 6.0.32:


Download apache-tomcat-6.0.32.tar.gz here

Save the file to a directory. I'm saving it to /root/apache-tomcat-6.0.32.tar.gz

Before proceeding, you should verify the MD5 Checksum for your Tomcat download (or any other download).

Since we saved the Tomcat download to /root/apache-tomcat-6.0.32.tar.gz, we'll go to the /root directory and use the md5sum command.

[root@blanche ~]# md5sum apache-tomcat-6.0.32.tar.gz
082a0707985b6c029920d4d6d5ec11cd


Compare the output above to the MD5 Checksum provided by the Apache Tomcat MD5 page and insure that they match exactly. (There is also a link to display the MD5 checksum located just to the right off the download link).

Now, move (mv) or copy (cp) the file to the /usr/share directory:

[root@blanche ~]# mv apache-tomcat-6.0.32.tar.gz /usr/share/apache-tomcat-6.0.32.tar.gz


Change to the /usr/share directory and unpack the file using tar -xzf:

[root@blanche ~]# cd /usr/share
[root@sv2 blanche ]# tar -xzf apache-tomcat-6.0.32.tar.gz  


This will create the directory /usr/share/apache-tomcat-6.0.32

At this point, you could start Tomcat via the Tomcat bin directory using the Tomcat startup.sh script located at /usr/share/apache-tomcat-6.0.32/bin.

[root@blanche share]# cd /usr/share/apache-tomcat-6.0.32/bin
[root@blanche bin]# ./startup.sh


Step 3: How to Run Tomcat as a Service.


We will now see how to run Tomcat as a service and create a simple Start/Stop/Restart script, as well as to start Tomcat at boot.

Change to the /etc/init.d directory and create a script called 'tomcat' as shown below.

[root@blanche share]# cd /etc/init.d
[root@blanche init.d]# vi tomcat


#!/bin/bash
# description: Tomcat Start Stop Restart
# processname: tomcat
# chkconfig: 234 20 80
JAVA_HOME=/usr/java/jdk1.6.0_24
export JAVA_HOME
PATH=$JAVA_HOME/bin:$PATH
export PATH
CATALINA_HOME=/usr/share/apache-tomcat-6.0.32

case $1 in
start)
sh $CATALINA_HOME/bin/startup.sh
;; 
stop)   
sh $CATALINA_HOME/bin/shutdown.sh
;; 
restart)
sh $CATALINA_HOME/bin/shutdown.sh
sh $CATALINA_HOME/bin/startup.sh
;; 
esac    
exit 0


The above script is simple and contains all of the basic elements you will need to get going.

As you can see, we are simply calling the startup.sh and shutdown.sh scripts located in the Tomcat bin directory (/usr/share/apache-tomcat-6.0.32/bin).

You can adjust your script according to your needs and, in subsequent posts, we'll look at additional examples.

CATALINA_HOME is the Tomcat home directory (/usr/share/apache-tomcat-6.0.32)

Now, set the permissions for your script to make it executable:

[root@blanche init.d]# chmod 755 tomcat


We now use the chkconfig utility to have Tomcat start at boot time. In my script above, I am using chkconfig: 244 20 80. 2445 are the run levels and 20 and 80 are the stop and start priorities respectively. You can adjust as needed.

[root@blanche init.d]# chkconfig --add tomcat
[root@blanche init.d]# chkconfig --level 234 tomcat on


Verify it:

[root@blanche init.d]# chkconfig --list tomcat
tomcat          0:off   1:off   2:on    3:on    4:on    5:off   6:off


Now, let's test our script.

Start Tomcat:

[root@blanche ~]# service tomcat start
Using CATALINA_BASE:   /usr/share/apache-tomcat-6.0.32
Using CATALINA_HOME:   /usr/share/apache-tomcat-6.0.32
Using CATALINA_TMPDIR: /usr/share/apache-tomcat-6.0.32/temp
Using JRE_HOME:        /usr/java/jdk1.6.0_24
Using CLASSPATH:       /usr/share/apache-tomcat-6.0.32/bin/bootstrap.jar


Stop Tomcat:

[root@blanche ~]# service tomcat stop
Using CATALINA_BASE:   /usr/share/apache-tomcat-6.0.32
Using CATALINA_HOME:   /usr/share/apache-tomcat-6.0.32
Using CATALINA_TMPDIR: /usr/share/apache-tomcat-6.0.32/temp
Using JRE_HOME:        /usr/java/jdk1.6.0_24
Using CLASSPATH:       /usr/share/apache-tomcat-6.0.32/bin/bootstrap.jar
Restarting Tomcat (Must be started first):

[root@blanche ~]# service tomcat restart
Using CATALINA_BASE:   /usr/share/apache-tomcat-6.0.32
Using CATALINA_HOME:   /usr/share/apache-tomcat-6.0.32
Using CATALINA_TMPDIR: /usr/share/apache-tomcat-6.0.32/temp
Using JRE_HOME:        /usr/java/jdk1.6.0_24
Using CLASSPATH:       /usr/share/apache-tomcat-6.0.32/bin/bootstrap.jar
Using CATALINA_BASE:   /usr/share/apache-tomcat-6.0.32
Using CATALINA_HOME:   /usr/share/apache-tomcat-6.0.32
Using CATALINA_TMPDIR: /usr/share/apache-tomcat-6.0.32/temp
Using JRE_HOME:        /usr/java/jdk1.6.0_24
Using CLASSPATH:       /usr/share/apache-tomcat-6.0.32/bin/bootstrap.jar


We should review the Catalina.out log located at /usr/share/apache-tomcat-6.0.32/logs/catalina.out and check for any errors.

[root@blanche init.d]# less /usr/share/apache-tomcat-6.0.32/logs/catalina.out


We can now access the Tomcat Manager page at:

http://yourdomain.com:8080 or http://yourIPaddress:8080 and we should see the Tomcat home page.

Step 5 (Optional): How to Run Tomcat using Minimally Privileged (non-root) User.


In our Tomcat configuration above, we are running Tomcat as Root.

For security reasons, it is always best to run services with the only those privileges that are necessary.

There are some who make a strong case that this is not required, but it's always best to err on the side of caution.

To run Tomcat as non-root user, we need to do the following:

1. Create the group 'tomcat':

[root@blanche ~]# groupadd tomcat
[root@blanche ~]# useradd -s /bin/bash -g tomcat tomcat


2. Create the user 'tomcat' and add this user to the tomcat group we created above.

[root@blanche ~]# groupadd tomcat
[root@blanche ~]# useradd -s /bin/bash -g tomcat tomcat


The above will create a home directory for the user tomcat in the default user home as /home/tomcat

If we want the home directory to be elsewhere, we simply specify so using the -d switch.

[root@blanche ~]# useradd -g tomcat -d /usr/share/apache-tomcat-6.0.32/tomcat tomcat


The above will create the user tomcat's home directory as /usr/share/apache-tomcat-6.0.32/tomcat

3. Change ownership of the tomcat files to the user we created above:

[root@blanche ~]# chown -Rf tomcat.tomcat /usr/share/apache-tomcat-6.0.32/


Note: it is possible to enhance our security still further by making certain files and directory read-only. This will not be covered in this post and care should be used when setting such permissions.

4. Adjust the start/stop service script we created above. In our new script, we need to su to the user tomcat:

#!/bin/bash
# description: Tomcat Start Stop Restart
# processname: tomcat
# chkconfig: 234 20 80
JAVA_HOME=/usr/java/jdk1.6.0_24
export JAVA_HOME
PATH=$JAVA_HOME/bin:$PATH
export PATH
TOMCAT_HOME=/usr/share/apache-tomcat-6.0.32/bin

case $1 in
start)
/bin/su tomcat $TOMCAT_HOME/startup.sh
;; 
stop)   
/bin/su tomcat $TOMCAT_HOME/shutdown.sh
;; 
restart)
/bin/su tomcat $TOMCAT_HOME/shutdown.sh
/bin/su tomcat $TOMCAT_HOME/startup.sh
;; 
esac    
exit 0


Step 6 (Optional): How to Run Tomcat on Port 80 as Non-Root User.


Note: the following applies when you are running Tomcat in "stand alone" mode. That is, you are running Tomcat without Apache in front of it.

To run services below port 1024 as a user other than root, you can add the following to your IP tables:

[root@blanche ~]# iptables -t nat -A PREROUTING -p tcp -m tcp --dport 80 -j REDIRECT --to-ports 8080  
[root@blanche ~]# iptables -t nat -A PREROUTING -p udp -m udp --dport 80 -j REDIRECT --to-ports 8080  


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