Active yesterday. I try to use command java -version and I got error: -bash: java: command not found. javac: command not found ubuntu5.10 j2sdk1.4.2. Safety of taking a bicycle to a country where they drive on the other side of the road? X-dark. If this is the case, you will need to set the path manually. Hello everybody: I have done something stupid. You can do it interactively, and select from a list of available options: sudo update-alternatives --config javac Or you can specify which option you want on the command-line: Suppose you installed the JDK in /usr/local/jdk1.8.0. All I receive is. Podcast 318: What’s the half-life of your code? By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. All rights reserved, 14 Command Line Tools to Check CPU Usage in Linux, How to Give Root Privileges to a User in Linux, How to Enable or Disable Services in Ubuntu Systemd/Upstart, How to Install Nvidia Driver on Ubuntu 20.04, How to Mine Ethereum on Ubuntu 16.04/20.04. Asking for help, clarification, or responding to other answers. I am told to run in the terminal javac Example.java. It's necessary to configure the default Java version used by the operating system. How to run java/javac command from terminal, JAVAC is not in the jdk path but java -version says JDK is installed, Problem installing Microsemi LiberoSoC on Ubuntu, Java will not run at all and is not recognized as a command no matter how many times I install it, Using update-java-alternatives with openjdk 8 updates java but not javac. XWiki is not found in the Ubuntu 20.04 repository. Reload the environment file for applying the change: In this tutorial, we learned how to install and configure Java on Ubuntu 20.04. A sudo non-root user, which you can set up by following the Ubuntu 16.04 initial server setup guide. Reconstruct an integer from its prime exponents. How do I finish installing Sun JDK after cancelling out of the legal term screen? Where is your .java file? Close your command prompt and reopen it,and write the code for compile and execution. If your file is in /home/shawn/usr/java, you have to change within terminal to this directory with the cd (ChangeDirectory) command: Now type ls -l command again to see your files in /home/shawn/usr/java. or javac: Command not found - after installing Java Here's one way to tell UNIX where to find javac. The -d option is used to specify the output directory containing compiled files. If Java is not installed on your system then use the following command to install the Java JDK. The easiest option for installing Java is using the version packaged with Ubuntu. How exactly did engineers come to the final design of jets like the F-16 or SR-71? javac: file not found: Example.java Usage: javac