Apache Tomcat is an open source web server and servlet container developed by the Apache Software Foundation. It executes Java servlets and renders Web pages that include Java Server Page coding and it is one of the most popular web servers used by the java developers. It is really so simple to install Apache Tomcat on Ubuntu 17.04, and this article covers the ground on the same process.
In order to install Tomcat, it is really very essential to install Java, so make sure you run the following command.
root@linuxhelp11:~# apt-get install default-jdk Reading package lists... Done Building dependency tree Reading state information... Done The following additional packages will be installed: ca-certificates-java default-jdk-headless default-jre default-jre-headless fonts-dejavu-extra java-common libatk-wrapper-java libatk-wrapper-java-jni libgif7 libice-dev libpthread-stubs0-dev libsm-dev libx11-dev libx11-doc libxau-dev libxcb1-dev libxdmcp-dev libxt-dev openjdk-8-jdk openjdk-8-jdk-headless openjdk-8-jre openjdk-8-jre-headless x11proto-core-dev x11proto-input-dev x11proto-kb-dev xorg-sgml-doctools xtrans-dev Suggested packages:. . . Updating certificates in /etc/ssl/certs... 0 added, 0 removed; done. Running hooks in /etc/ca-certificates/update.d... done. done.
Once it is done, you can check if its installed properly by making use of the following command which displays the version of Java.
root@linuxhelp11:~# java -version openjdk version "1.8.0_151" OpenJDK Runtime Environment (build 1.8.0_151-8u151-b12-0ubuntu0.17.04.2-b12) OpenJDK 64-Bit Server VM (build 25.151-b12, mixed mode)
After that, you should create a user for Tomcat.
root@linuxhelp11:~# useradd -r tomcat9 --shell /bin/false
And then, you need to enter into opt location and for that, you need to run the following command.
root@linuxhelp11:~# cd /opt
Now, you shall download tomcat9 package by using the wget command in the following manner.
root@linuxhelp11:/opt# wget http://www-eu.apache.org/dist/tomcat/tomcat-9/v9.0.1/bin/apache-tomcat-9.0.1.tar.gz --2017-11-24 05:35:47-- http://www-eu.apache.org/dist/tomcat/tomcat-9/v9.0.1/bin/apache-tomcat-9.0.1.tar.gz Resolving www-eu.apache.org (www-eu.apache.org)... 22.214.171.124 Connecting to www-eu.apache.org (www-eu.apache.org)|126.96.36.199|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 9397803 (9.0M) [application/x-gzip] Saving to: ‘apache-tomcat-9.0.1.tar.gz’ apache-tomcat-9.0.1 100%[===================>] 8.96M 11.3MB/s in 0.8s 2017-11-24 05:36:05 (11.3 MB/s) - ‘apache-tomcat-9.0.1.tar.gz’ saved [9397803/9397803]
After that, make sure you extract the downloaded file by using the following command.
root@linuxhelp11:/opt# tar -zxf apache-tomcat-9.0.1.tar.gz
You should also create the symbolic link for extracted directory by making use of the following command.
root@linuxhelp11:/opt# ln -s apache-tomcat-9.0.1 tomcat-latest
And then, you should change the ownership of the extracted directory by running the following command.
root@linuxhelp11:/opt# chown -hR tomcat9: tomcat-latest apache-tomcat-9.0.1
Next, you should create user for manager and admin in tomcat-user file as follows.
root@linuxhelp11:/opt# vim tomcat-latest/conf/tomcat-users.xml And in that file, add the following. <role rolename="manager-gui"/> <role rolename="admin-gui"/> <user username="admin" password="password" roles="manager-gui,admin-gui"/>
Next, make an entry to allow the server
root@linuxhelp11:/opt# vim tomcat-latest/webapps/manager/META-INF/context.xml in file , modify following <Valve className="org.apache.catalina.valves.RemoteAddrValve" allow="127.d+.d+.d+|::1|0:0:0:0:0:0:0:1|< server ip >" /> root@linuxhelp11:/opt# vim tomcat-latest/webapps/host-manager/META-INF/context.xml in file , modify following <Valve className="org.apache.catalina.valves.RemoteAddrValve" allow="127.d+.d+.d+|::1|0:0:0:0:0:0:0:1|< server ip >" />
configure deomon file for start and stop tomcat service
root@linuxhelp11:/opt# vim /etc/systemd/system/tomcat.service in file , add following [Unit] Description=Tomcat9 After=network.target [Service] Type=forking User=tomcat9 Group=tomcat9 Environment=CATALINA_PID=/opt/tomcat-latest/tomcat9.pid Environment=JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-amd64 Environment=CATALINA_HOME=/opt/tomcat-latest Environment=CATALINA_BASE=/opt/tomcat-latest Environment="CATALINA_OPTS=-Xms512m -Xmx512m" Environment="JAVA_OPTS=-Dfile.encoding=UTF-8 -Dnet.sf.ehcache.skipUpdateCheck=true -XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled -XX:+UseParNewGC" ExecStart=/opt/tomcat-latest/bin/startup.sh ExecStop=/opt/tomcat-latest/bin/shutdown.sh [Install] WantedBy=multi-user.target
And then, reload deomon with the help of the following commamd.
root@linuxhelp11:/opt# systemctl daemon-reload
You shall now start the Tomcat service by running the following command.
root@linuxhelp11:/opt# systemctl start tomcat
Also, you need to enable the Tomcat service through the following command.
root@linuxhelp11:/opt# systemctl enable tomcat
Created symlink from /etc/systemd/system/multi-user.target.wants/tomcat.service to /etc/systemd/system/tomcat.service.
Now, open your browser and give localhost:8080 as the URL . The home page of Tomcat appears on your screen.
If you want to open the manager app, then click on it.
And give your login credentials in the popup that appears.
The Manager page of Tomcat now appears.
If you want to open the VirtualHost for admin panel, then click on Host manage.
In the popup that appears, give your credentials.
The Host page now appears.
With this, the installation of Tomcat9 comes to an end.
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