Entry level command line use

Related links

• Command line arguments

Starting a terminal / command line

On windows you can click in the explorer url bar and type either of cmd or powershell.

Also on windows you can shift + right click in a folder and pick 'open cmd here' or 'open powershell here'.

The basics

java -jar serversync.jar

Passing arguments on the command line (or in batch files) is done after you call the program in question.

In our case we are calling java and passing it a flag "-jar" (java run a jar file if you could).

Then we pass what we want java to run, serversync (java run serversync please).

The second part of the call:

serversync.jar --server

Much the same, we are calling serversync and passing it the argument "server" (serversync run as a server bro)

All together we get: (java kind sir run serversync in server mode if you could my good hotmun), or in boring syntax:

java -jar serversync.jar --server

Batch files (scripts)

@echo off
SETLOCAL
FOR %%f IN (forge*.jar) DO (SET forge=%%~nxf)
FOR %%f IN (serversync*.jar) DO (SET serversync=%%~nxf)
START "Minecraft Server" java -Xms2g -Xmx2g -jar %forge% nogui
START "ServerSync Server" java -jar %serversync% --server
ENDLOCAL

Here we have a script, the problem we want to solve:

• Run forge with server related arguments
• Run serversync in server mode

Considerations:

• We dont want to have to update the script every time versions change

FOR %%f IN (forge*.jar) DO (SET forge=%%~nxf)

Loop through files that match (forge(anything).jar) and put the filename in the variable "forge"

START "Minecraft Server" java -Xms2g -Xmx2g -jar %forge% nogui

Start is a program like java or serversync, it has a required first argument which becomes the title of the started window "Minecraft Server". %forge% <- Access the variable we created earlier and place it here

This script uses start as we need to open two processes, if we had our script like so:

@echo off
SETLOCAL
FOR %%f IN (forge*.jar) DO (SET forge=%%~nxf)
FOR %%f IN (serversync*.jar) DO (SET serversync=%%~nxf)
java -Xms2g -Xmx2g -jar %forge% nogui <-- blocks here until completion
java -jar %serversync% --server
ENDLOCAL

Then the script would block on execution of the forge command and ServerSync would only run after forge shuts down, not really what we want.