Ubuntu Java Tomcat Notes: Systemctl command to install tomcat

 1. Download tomcat and save it to /opt/tomcat

2. change permission of all files in /opt/tomcat/bin directory to +x

chmod +x /opt/tomcat/bin/

3. sudo vim /etc/systemd/system/tomcat.service

[Unit]

Description=Tomcat Web Application Container

After=network.target multi-user.target

[Service]

Type=forking

User=username #replace with your username

Group=username #replace with your groupname

Environment="CATALINA_BASE=/opt/tomcat"

Environment="CATALINA_HOME=/opt/tomcat"

Environment="CATALINA_TMPDIR=/opt/tomcat/temp"

Environment="JRE_HOME=/home/newmkg/.sdkman/candidates/java/current"

Environment="JAVA_HOME=/home/newmkg/.sdkman/candidates/java/current"

Environment="CLASSPATH=/opt/tomcat/bin/bootstrap.jar:/opt/tomcat/bin/tomcat-juli.jar"

ExecStart=/opt/tomcat/bin/startup.sh

ExecStop=/opt/tomcat/bin/shutdown.sh

Restart=on-failure

[Install]

WantedBy=multi-user.target

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4. run commands to start tomcat

sudo systemctl daemon-reload;

sudo systemctl enable tomcat.service;

sudo systemctl start tomcat.service;

5. check status of tomcat

sudo systemctl status tomcat.service;

6. in case of issue try to restart tomcat via systemctl commant

sudo systemctl restart tomcat.service;

7. Is issue not resolved, run commands

sudo systemctl stop tomcat.service;

sudo systemctl disable tomcat.service;

sudo systemctl daemon-reload.service;

8. Then delete /opt/tomcat & repeat steps 1-6 above