The jstack command is part of the Java Development Kit (JDK), specifically the openjdk-xx-jdk package (where xx is the Java version).

Here’s a detailed, feature-length guide to installing and using jstack on Ubuntu.


🚀 Basic Usage Examples

Get PID of Java process

ps aux | grep java
# or
jps -l

For Java 8 (Legacy systems):

sudo apt install openjdk-8-jdk

After installation, verify that jstack is now accessible:

jstack -version

Example output:

1.8.0_392