sudo apt update sudo apt install default-jdk Alternatively, install a specific version (e.g., JDK 17):
jstack -version List Java processes:
jps -l Print stack trace of a Java process (replace PID with process ID): install jstack on ubuntu
sudo apt install openjdk-17-jdk-headless jstack is not available in any JRE-only package (e.g., openjdk-17-jre ). 3. Verify Installation After installation, check that jstack is available: sudo apt update sudo apt install default-jdk Alternatively,
sudo apt install openjdk-17-jdk Ubuntu’s package openjdk-<version>-jdk-headless also includes jstack : install a specific version (e.g.