The jstack command is part of the Java Development Kit (JDK), specifically the openjdk-xx-jdk package (where xx is the Java version).
This should help you get jstack installed and working on your Ubuntu system. install jstack on ubuntu
Installing jstack on Ubuntu is not about downloading a single tool, but about installing a complete Java Development Kit. While this may seem heavy-handed, the JDK offers numerous other utilities (jstat, jmap, jconsole, jcmd) that complement jstack in diagnosing JVM issues. By following this guide, you can reliably install jstack on any Ubuntu version (16.04 through 24.04) and start debugging Java thread problems immediately. The jstack command is part of the Java
sudo jstack -l 12345
First, see if you already have a JDK installed by checking the version: javac -version Use code with caution. Copied to clipboard First, see if you already have a JDK
which jstack