How To Install Tomcat9 On Linuxmint 18.3

After that, you should create a user for Tomcat.

linuxhelp ~ # useradd -r tomcat9 --shell /bin/false

And then, you need to enter into /opt location to download the apache-tomcat9.

linuxhelp ~ # cd /opt/
linuxhelp opt #

Now, you shall download tomcat9 package by using the wget command in the following manner.

linuxhelp opt # wget http://www-eu.apache.org/dist/tomcat/tomcat-9/v9.0.6/bin/apache-tomcat-9.0.6.tar.gz
--2018-03-24 04:37:07--  http://www-eu.apache.org/dist/tomcat/tomcat-9/v9.0.6/bin/apache-tomcat-9.0.6.tar.gz
Resolving www-eu.apache.org (www-eu.apache.org)... 195.154.151.36, 2001:bc8:2142:300::
Connecting to www-eu.apache.org (www-eu.apache.org)|195.154.151.36|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 9494739 (9.1M) [application/x-gzip]
Saving to: ‘ apache-tomcat-9.0.6.tar.gz’ 

apache-tomcat-9.0.6.tar.gz           100%[===================================================================> ]   9.05M  43.8MB/s    in 0.2s    

2018-03-24 04:37:37 (43.8 MB/s) - ‘ apache-tomcat-9.0.6.tar.gz’  saved [9494739/9494739]

After that, make sure you extract the downloaded file by using the following command.

linuxhelp opt # tar -xzf apache-tomcat-9.0.6.tar.gz
linuxhelp opt # ls
apache-tomcat-9.0.6  apache-tomcat-9.0.6.tar.gz

You should also create the symbolic link for an extracted directory by making use of the following command.

linuxhelp opt # ln -s apache-tomcat-9.0.6 tomcat-latest

And then, you should change the ownership of the extracted directory by running the following command.

linuxhelp opt # chown -hR tomcat9: tomcat-latest apache-tomcat-9.0.6

Next, you should create a user for manager and admin in the tomcat-user file as follows.

linuxhelp opt # vim tomcat-latest/conf/tomcat-users.xml
< 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.

linuxhelp opt # vim tomcat-latest/webapps/manager/META-INF/context.xml
< Context antiResourceLocking=" false"  privileged=" true"  > 
  < Valve className=" org.apache.catalina.valves.RemoteAddrValve" 
         allow=" 127.d+.d+.d+|::1|0:0:0:0:0:0:0:1|192.168.7.232"  /> 
  < Manager sessionAttributeValueClassNameFilter=" java.lang.(?:Boolean|Integer|Long|Number|String)|org.apache.catalina.filters.CsrfPreventionFilter$LruCache(?:$1)?|java.util.(?:Linked)?HashMap" /> 
< /Context> 
linuxhelp opt # vim tomcat-latest/webapps/host-manager/META-INF/context.xml
< Context antiResourceLocking=" false"  privileged=" true"  > 
  < Valve className=" org.apache.catalina.valves.RemoteAddrValve" 
         allow=" 127.d+.d+.d+|::1|0:0:0:0:0:0:0:1|192.168.7.232"  /> 
  < Manager sessionAttributeValueClassNameFilter=" java.lang.(?:Boolean|Integer|Long|Number|String)|org.apache.catalina.filters.CsrfPreventionFilter$LruCache(?:$1)?|java.util.(?:Linked)?HashMap" /> 
< /Context> 

Configure daemon file for start and stop tomcat service.

linuxhelp opt # vim /etc/systemd/system/tomcat.service
[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 daemon with the help of the following command.

linuxhelp opt # systemctl daemon-reload

You shall now start the Tomcat service by running the following command.

linuxhelp opt # systemctl start tomcat.service

Also, you need to enable the Tomcat service through the following command.

linuxhelp opt # systemctl enable tomcat.service 
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.