Ubuntu – How do i make the jar file execute like a regular application from Terminal

command lineexecute-commandjava

We all know that there are some commands i.e. executables we can run directly from terminal without having to set the full path for them. For e.g. all the executables in the /usr/bin

I have a jar file that I am currently running by the command java -jar jarName.jar {arguments}

Is there a way that I can run my jar as well similarly without writing the whole command java -jar path_to_jar/jarName.jar {arguments}

I would like to write something like

appName {arguments} and want the jar to get the arguments and execute just like it would have if I had written java -jar path_to_jar/jarName.jar

I am open to making the jar file an executable and putting it in /usr/bin so that it can accessed from anywhere. But I do not know how to do this. The following did not help at all Tutorial to make jar executable

Best Answer

You might want to try to make a bash script that executes your command. In your case it would look like this :

#!/bin/sh 
java -jar path_to_jar/jarName.jar "$*"

The "$*" takes all arguments given to the bash script and send them directly to your java program. The last thing to do is to save your script in /usr/bin/myprogram.sh Then you will be able to execute it directly as a command in the terminal:

myprogram arg1 arg2 arg3 arg4

Related Solutions

Ubuntu – How to make a jar file run on startup & and when you log out

Here's a easy way to do that using SysVInit. Instructions:

Create the start and the stop script of your application. Put it on some directory, in our example is:
- Start Script: /usr/local/bin/myapp-start.sh
- Stop Script: /usr/local/bin/myapp-stop.sh
Each one will provide the instructions to run/stop the app. For instance the myapp-start.sh content can be as simple as the following:
```
#!/bin/bash

java -jar myapp.jar 
```
For the stop script it can be something like this:
```
#!/bin/bash
# Grabs and kill a process from the pidlist that has the word myapp

pid=`ps aux | grep myapp | awk '{print $2}'`
kill -9 $pid
```

Create the following script (myscript) and put it on /etc/init.d.

/etc/init.d/myscript content:

#!/bin/bash
# MyApp
#
# description: bla bla

case $1 in
    start)
        /bin/bash /usr/local/bin/myapp-start.sh
    ;;
    stop)
        /bin/bash /usr/local/bin/myapp-stop.sh
    ;;
    restart)
        /bin/bash /usr/local/bin/myapp-stop.sh
        /bin/bash /usr/local/bin/myapp-start.sh
    ;;
esac
exit 0

Put the script to start with the system (using SysV). Just run the following command (as root):
```
update-rc.d myscript defaults 
```

PS: I know that Upstart is great and bla bla, but I preffer the old SysV init system.

Ubuntu – How to execute a .jar file from the terminal

The . syntax can only be used to run (by "sourcing") shell scripts.

You'll need to use the java command to run a .jar file:

java -jar Minecraft.jar

If you don't have java installed, you can fix that by installing the default-jre¹ package. You can see if you already have java installed by running in a terminal:

java -version

[1]: This will install the default openjdk Java runtime. You can use openjdk-8-jre, or openjdk-7-jre, or openjdk-6-jre instead, if you prefer - whichever is available on your version of Ubuntu.

Best Answer

Related Solutions

Ubuntu – How to make a jar file run on startup & and when you log out

Ubuntu – How to execute a .jar file from the terminal

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