sudo apt install openjdk-21-jdk # OR sudo apt install openjdk-17-jdk Use code with caution. Step 3: Set Up Environment Variables
If you see "command not found," proceed with the installation steps below. Step 2: Install OpenJDK (Recommended) install jstack on ubuntu
The easiest method is to use the official Ubuntu repositories to install OpenJDK. sudo apt update sudo apt install default-jdk Use code with caution. To install a specific version (e.g., OpenJDK 21 or 17): sudo apt install openjdk-21-jdk # OR sudo apt