how to configure Apachi Tomcat?

how to configure Apachi Tomcat?

By default you only able to access default Tomcat page, to access admin and other sections like Server Status, Manager App and Host Manager. You need to configure user accounts for admins and managers. To do so, you need to edit ‘tomcat-users.xml‘ file located under/opt/apache-tomcat-8.0.9/conf directory.

Setup Tomcat User Accounts

For example, to assign the manager-gui role to a user named ‘tecmint‘ with a password ‘t$cm1n1‘, add the following line of code to the config file inside the section.

# vi /opt/apache-tomcat-8.0.9/conf/tomcat-users.xml 

<role rolename="manager-gui"/>

<user username="tecmint" password="t$cm1n1" roles="manager-gui"/>

Similarly, you can also add ‘admin-gui‘ role to a admin user named ‘admin‘ with a password ‘adm!n‘ as shown below.

<role rolename="admin-gui"/>

<user username="admin" password="adm!n" roles="admin-gui"/>

Create User Accounts in Tomcat

After setting up the admin and managers roles, restart the Tomcat and then try to access the admin section.

./shutdown.sh 

./startup.sh

For example, click on 'Server Status' tab, it will prompt you to enter user credentials, enter username and password that you've added above in config file.

Tomcat Admin Login

Changing Tomcat Port

If you want to run Tomcat on different port say 80 port. You will have to edit the ‘server.xml‘ file in ‘/opt/apache-tomcat-8.0.9/conf/‘. Before changing, port, make sure to stop the Tomcat server using.

# /opt/apache-tomcat-8.0.9/bin/shutdown.sh

Now open the server.xml file using the Vi editor.

# vi /opt/apache-tomcat-8.0.9/conf/server.xml

Now search for “Connector port” and change its value from 8080 to 80 or any other port you want as it follows.

To save the file, Press the ‘ESC’ key, and write :w then :x.

Now restart the Apache Tomcat server again, using below command.

# /opt/apache-tomcat-8.0.9/bin/startup.sh

That’s it, you server will be running on the 80 port.

Of course, you have to run all the above commands as a root, if you don’t they won’t work because we are working in the ‘/opt‘ directory which is a folder owned by the root user only, if you want you can run the server as a normal user but you will have to use your HOME folder as a working area to download, extract and run the Apache Tomcat server.

To get some information about your running Tomcat server and your computer, run.

/opt/apache-tomcat-8.0.9/bin/version.sh

Sample Output

Using CATALINA_BASE:   /opt/apache-tomcat-8.0.9

Using CATALINA_HOME:   /opt/apache-tomcat-8.0.9

Using CATALINA_TMPDIR: /opt/apache-tomcat-8.0.9/temp

Using JRE_HOME:        /usr

Using CLASSPATH:       /opt/apache-tomcat-8.0.9/bin/bootstrap.jar:/opt/apache-tomcat-8.0.9/bin/tomcat-juli.jar

Server version: Apache Tomcat/8.0.9

Server built:   Jun 19 2014 01:54:25

Server number:  8.0.9.0

OS Name:        Linux

OS Version:     2.6.32-042stab084.26

Architecture:   i386

JVM Version:    1.8.0_20-b26

JVM Vendor:     Oracle Corporation

That’s it! Now you can start deploying JAVA based applications under Apache Tomcat. For more about on how to deploy applications and create virtual hosts.