jstack on Ubuntujstack is a command-line utility that comes bundled with the Java Development Kit (JDK). It is used to print Java stack traces of Java threads for a specified Java process. This tool is invaluable for developers and system administrators who need to debug applications, diagnose deadlocks, or identify performance bottlenecks (CPU spikes).
After installation, verify:
You can install the default Ubuntu JDK or a specific version. OpenJDK 17 is the current Long Term Support (LTS) version. To install the default JDK: sudo apt install default-jdk Use code with caution. Copied to clipboard To install a specific version (e.g., Java 11 or 17): install jstack on ubuntu
sudo dpkg -i oracle-jdk-17_linux-x64_bin.deb
jstack 2345 > threaddump.txt