Hamsa K
7 min read | 5 years ago

Install tomcat 9 on centos 7

How to install and configure Tomcat 9 on centos 7

Apache Tomcat is an open-source web server developed by Apache Foundation to provide a pure Java HTTP server, which is useful to run Java files easily.

Tomcat 9 requires Java 8 or later.Before installing Tomcat make sure you must have JAVA installed on your Linux server to run Tomcat.

Apache Tomcat 9 support:

  • Java Servlet 4.0
  • JavaServer Pages 2.4
  • Java Unified Expression Language 3.1
  • and Java API for WebSocket 2.0 specifications.

Step1: Installing Java

# yum install java-1.8.0

Once java is installed verify java version by following command.

# java -version

Sample output as below

[root@lampblogs ~]# java -version 
openjdk version "1.8.0_212" 
OpenJDK Runtime Environment (build 1.8.0_212-b04) 
OpenJDK 64-Bit Server VM (build 25.212-b04, mixed mode)

Step2: Installing Apache Tomcat 9

Download latest version of Apache tomcat (ie 9.0.21) is most Recent version at the time of writing this article.you can download from following url if there is lastet version available.

# cd /opt 
# wget http://mirrors.estointernet.in/apache/tomcat/tomcat-9/v9.0.21/bin/apache-tomcat-9.0.21.tar.gz 
# tar -xvzf apache-tomcat-9.0.21.tar.gz 
# mv apache-tomcat-9.0.21 tomcat9

step 3: create Tomact user and group and set permissions

groupadd tomcat 
useradd -s /bin/false -g tomcat -d /opt/tomcat tomcat 
chown tomcat:tomcat -R /opt/tomcat/ 
chmod +x /opt/tomcat/bin/*

step 4: Set Environment Variables

Now configure the CATALINA_HOME environment variable in your system using the following commands. Its required to run the Tomcat server.

# echo "export CATALINA_HOME="/opt/tomcat"" >> ~/.bashrc 
# source ~/.bashrc

you will get command output as below.

[root@lampblogs ~]# echo $CATALINA_HOME 

step 5: setup user accounts

we need to create user accounts to secure and access admin/manager

By default no user or account is allowed to access Manager GUI Page and Admin Page. So to grant access to the users add the following lines.

vim /opt/tomcat/conf/tomcat-users.xml
<!-- User lampblogs who can access only manager section -->
<role rolename="manager-gui" />
<user username="lampblogs" password="<Enter-Secure-Password>" roles="manager-gui" />
<!-- User Admin Who can access manager and admin section both -->
<role rolename="admin-gui" />
<user username="admin" password="<Enter-Secure-Password>" roles="admin-gui" />

Replace secure-Password with your strong password.

step 6: start and stop tomcat service

[root@lampblogs ~]# cd /opt/tomcat/bin/ 
[root@lampblogs bin]# ./startup.sh 
Using CATALINA_BASE: /opt/tomcat 
Using CATALINA_HOME: /opt/tomcat 
Using CATALINA_TMPDIR: /opt/tomcat/temp Using JRE_HOME: /usr 
Using CLASSPATH: /opt/tomcat/bin/bootstrap.jar:/opt/tomcat/bin/tomcat-juli.jar 
Tomcat started.

To shutdown service use below command.

[root@lampblogs bin]# ./shutdown.sh

step 7: configure Apache tomcat as a service

vim /etc/systemd/system/apache-tomcat.service
Description=Apache Tomcat 9 Servlet Container 
After=syslog.target network.target [Service] 
[Install] WantedBy=multi-user.target

Now reload systemd service and start using systemctl

# systemctl daemon-reload 
# systemctl start apache-tomcat 
# systemctl enable apache-tomcat

step 8: open tomcat port in firewall

[root@lampblogs ~]# firewall-cmd --permanent --zone=public --add-port=8080/tcp
[root@lampblogs ~]# firewall-cmd --reload

Open your web browser and type your server IP with port 8080. you will see  Tomcat home page.


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