Develop Reference

Powershell equivalent of running a jar in background

I used to run a jar in background with below syntax on a linux machine as below :
java -jar ./target/myjar-0.0.1-SNAPSHOT.jar > /dev/null 2>&1
But now i have a requirement to run the same jar in background on the Powershell on a windows machine . (I am not using Powershell Core version which allows use of & keyword for running background jobs , my version is 5.1)
I tried running my jar in background as below based on this answer here on StackOverflow (https://stackoverflow.com/a/25035181/4193280):
Start-Job -ScriptBlock {
& java -jar ./target/myjar-0.0.1-SNAPSHOT.jar >console.out 2>console.err
}
But still the jar is not executing and i am not able to connect on my application on port 9090 (that is where i have configured it to run) .
Please let me know and help where i am missing the point so that i can execute the jar in background . Thank you .

Linux Launch java program on startup (EC2 instance)

my server program needs to be launched on the startup of an EC2 instance. At the minute im just launching it from my SSH with the following commands:
java -jar ~/DocumentManager/DocumentServer-0.2.jar
I tried adding this to the .bashrc and /etc/rc.local files but they only seem to work when i ssh in.
Anyone know how to make it so an instance of my application is launched when the computer boots?
Thanks,
Ben

It's possible you can create a script java_server_launch.sh like this:
#! /usr/bin/sh
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin
JAVA=/usr/bin/java
MY_SERVER=/home/your_username/DocumentManager/DocumentServer-0.2.jar
USER=your_username
/bin/su - $USER -c "$JAVA -jar $MY_SERVER &"
Put your script under /etc/init.d directory, and then use the command:
update-rc.d java_server_launch.sh defaults
more on update-rc.d command by using man update-rc.d.
Hope this help.
Regards.

Add ampersand(symbol '&') at the end of the command.
For example, in your case, java -jar ~/DocumentManager/DocumentServer-0.2.jar &
Old question, but my answer might be helpful for people who look in future.

You can also run your program as a service which automatically run on ec2 container reboot. Below link worked for me:
https://medium.com/#lizlieholleza/run-your-java-application-as-a-service-in-an-ec2-instance-amazon-linux-d7c7b4c0b2f4

Run a java program in backend

Hi all i want to run a java application as backend process.that is like tomcat server.For that i had developed one application.and made one class as main class and calling from one script file .i.e(startup.sh) file.in startup.sh file i was calling one class.that is MainMethodClass.In main method class i had written my business logic.when i am running this app in linux server from using putty is is working until putty window is not closed.As closed after putty window it is also stopped.but i need to run this app even i closed also.How can i achieve this.

Nohup will detach a process you run from your current console and let it continue when you close the terminal. Run something like this.
nohup java -jar my.jar &
By default it will pipe the output to nohup.out, so if you don't want that you could try:
nohup java -jar my.jar > /dev/null &

This problem is not related to java, its actually something related to the way linux operates.
You need to do following:
nohup <your_application_command> &
Note the "nohup" and "&" at start and end respectively.

You should be able to do something like:
nohup java -jar MyApplication.jar &

On a linux machine you can create a service for your jar( executable jar like spring boot )
# Set the Application as Service
ln -s $APP_BASE/bin/$APP_NAME.jar /etc/init.d/$APP_NAME
echo "Starting the application as service"
service $APP_NAME start

Ubuntu System Start-up: What command to insert to run java app?

In Ubuntu 10.10, System/Preferences/Startup Applications, I am trying to add a .jar program. If the program sits in home/john/this-folder/app.jar, what would I put in the command line for it to run on start-up?

java -jar /home/john/this-folder/app.jar [optional arg if any]
java - the Java application launcher

Note that you need to include jar in classpath if you java app needs dependecies.
You do that by:
java -jar /yourApp.jar -cp /home/zzz/libs/

NSSM - the Non-Sucking Service Manager & Jetty

I am trying to use the NSSM - the Non-Sucking Service Manager to run Jetty that is included with Solr as a Windows Service. Everything works fine by placing Java.exe in my C:\solr folder and setting up NSSM by pointing to this Java.exe along with the following parameters -Dsolr.solr.home=C:/solr -jar start.jar
You can also run C:\solr\java.exe -Dsolr.solr.home=C:/solr -jar C:/solr/start.jar from the command line without installing the service as a test which works fine.
If I leave Java.exe in the System32 folder though, things will not work and I get a java.lang.ClassNotFoundException for org.mortbay.xml.XmlConfiguration.
I can of course run C:\solr\java -Dsolr.solr.home=C:/solr -jar C:/solr/start.jar as well since Java is in my PATH.
If seems like I need an additional classpath option or something but I don't know?

I ended up using the following in the arguments for NSSM: -Dsolr.solr.home=C:/solr/ -Djetty.home=C:/solr/ -Djetty.logs=C:/solr/logs/ -cp C:/solr/lib/*.jar;C:/solr/start.jar -jar C:/solr/start.jar