Running Java Applications in the Background

To execute a JAR file as a background process on Linux, utilize the nohup command combined with the ampersand symbol. This approach ensures the process continues running after terminal session termination.

nohup java -jar application-service.jar > runtime.log 2>&1 &

• nohup: Maintains process execution after session tremination
• java -jar application-service.jar: Executtes the speicfied JAR file
• > runtime.log: Redirects standard output to log file
• 2>&1: Merges standard error with standard output
• &: Executes command in background mode

Monitoring Background Java Processes

To inspect currently running Java applications, employ process listing commands with appropriate filters:

ps aux | grep 'java.*jar'

For targeted process monitoring:

ps aux | grep 'specific-application.jar'
top -p [process-id]

Terminating Java Application Processes

To gracefully stop a running Java application:

1. Identify the target process identifier:

ps -ef | grep target-application.jar

3. Terminate using the acquired PID:

kill [process-id]
# For forced termination:
# kill -9 [process-id]

For automated process termination:

kill $(pgrep -f target-application.jar)
# Forceful alternative:
# pkill -f target-application.jar