The -r option tells rm to remove directories and their contents recursively, and -f forces it to ignore nonexistent files and arguments, and never prompt before removing. The -rf option is a combination of -r (or -recursive) and -f (or -force). The rm command is used to remove files or directories. Then, remove the Tomcat directory: sudo rm -rf tomcat opt is a directory where optional or add-on software is typically installed. The cd command is used to change the current working directory. The exact steps can vary depending on how you installed Tomcat, but we’ll assume you installed it manually by unpacking a tar.gz file into the /opt/tomcat directory. Once you’ve stopped the Tomcat service, you can proceed with the uninstallation. The stop parameter instructs it to stop the process named tomcat. This command uses the systemctl tool, which is a system utility to manage system processes. Open a terminal and type the following command: sudo systemctl stop tomcat You can do this by stopping the Tomcat service. Preparing for Uninstallationīefore you proceed with the uninstallation, it’s crucial to ensure that there are no running processes that depend on Tomcat. It’s used to deploy and run Java applications and is widely adopted due to its robustness, simplicity, and speed. Apache Tomcat is an open-source implementation of the Java Servlet, JavaServer Pages, Java Expression Language, and Java WebSocket technologies. Now, you should be able to access Tomcat at. Jun 01 03:43:31 ubuntu20 systemd: Started Apache Tomcat. Jun 01 03:43:31 ubuntu20 startup.sh: Tomcat started. Jun 01 03:43:31 ubuntu20 systemd: Starting Apache Tomcat. └─12997 /usr/lib/jvm/java-11-openjdk-amd64/bin/java .file=/opt/tomcat/conf/logging.properties =org.ap> Process: 12975 ExecStart=/opt/tomcat/bin/startup.sh (code=exited, status=0/SUCCESS) Loaded: loaded (/etc/systemd/system/rvice disabled vendor preset: enabled)Īctive: active (running) since Mon 03:43:31 CEST 1h 14min ago Tomcat should be started now, you can check it with this command: systemctl status tomcat # systemctl daemon-reload # systemctl start tomcat Įnvironment=JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64Įnvironment=CATALINA_PID=/opt/tomcat/tomcat.pidĮnvironment="CATALINA_OPTS=-Xms512M -Xmx1024M -server -XX:+UseParallelGC" Paste the following into the systemd service file, then save it. We need the value of the third column for our Tomcat systemd file to set the JAVA_HOME environment variable. Create a Systemd Service File for TomcatĬheck the path of Tomcat’s home by running this command: # update-java-alternatives -l Once the Tomcat system user has been created, we need to update the ownership of the /opt/tomcat directory to tomcat user: # chown tomcat: -R /opt/tomcat/ 5. It is not a good idea to run Tomcat as root, so for security reasons we will create a new system user: # useradd -r tomcat -d /opt/tomcat -shell /bin/false # mkdir /opt/tomcat # tar xzvf tomcat.9.0.35.tar.gz -C /opt/tomcat -strip-components=1 4. Let’s create the directory and decompress the downloaded file there. In this article, we will install Tomcat into the /opt/tomcat directory. To proceed with the installation, let’s download the binary distribution file first. You can navigate to for more recent version, if any. When writing this tutorial, the latest stable Tomcat to download is version 9.0.35. OpenJDK 64-Bit Server VM (build 11.0.7+10-post-Ubuntu-3ubuntu1, mixed mode, sharing) 3. OpenJDK Runtime Environment (build 11.0.7+10-post-Ubuntu-3ubuntu1) Once installed, we can check the version using this command: # java -version java -version We can install the default JDK, version 11, which is available on the built-in Ubuntu 20.04 repositories by using the following command: # apt install default-jdk -y We need to have Java version 8 or higher installed on your system to run Tomcat 9. If there is no output, it means that Java is not installed on the server yet. We can check if Java is already installed using this command: # which java Tomcat 9 requires Java version 8 or higher. Then, run the following command to make sure that all installed packages on the server are updated to the latest available version. You should get this as your output: Distributor ID: Ubuntu Once logged in, you can check whether you have the proper Ubuntu version installed on your server with the following command: # lsb_release -a Make sure to replace “IP_Address” and “Port_number” with your server’s actual IP address and SSH port number. Log in to your Ubuntu 20.04 VPS using SSH: ssh -p Port_number Full SSH root access, or a user with sudo privileges is also required.For the purposes of this tutorial, we will use a server running Ubuntu VPS 20.04 LTS.Make sure that your server meets the following minimum requirements:
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