start.sh in.bash 同一个服务或者启动服务内的.sh文件

Question

im currently setting up a minecraft server on my root but struggle with the startup on boot.

Before having this in startup i was starting the server with a.sh file which i had to start manually. the.sh file also created a screen where i was able to check the console

.sh file:

screen -AmdS minecraft java -Xms4096M -Xmx4096M -jar /home/minecraft/server/server.jar nogui

But then i tried to have the server in startup of the root server so it starts automaticly

i created a service with a.bash file which starts the server with no problem on startup but without the screen option for the console

Service:

[Unit]
Description=Start Minecraft
After=network.target

[Service]
Type=simple
ExecStart=/root/start_minecraft_server.bash
TimeoutStartSec=0

[Install]
WantedBy=default.target

Bash:

#!/bin/bash

#Standard Minecraft
cd /home/minecraft/server/
exec java -Xmx4096M -Xms1024M -jar server.jar nogui

now i want to ask if you know any easy option for adding the screen option to the service or bash file?

Answer 1

Try this and make sure your screen is actually in /usr/bin/ by which screen

[Unit]
Description=Start Minecraft
After=network.target

    [Service]
    user=minecraft
    Type=simple
    ExecStart=/usr/bin/screen -S Minecraft_Server -d -m sh /root/start_minecraft_server.bash
    TimeoutStartSec=0
    
[Install]
WantedBy=default.target

But you should also alter your startcript itself:

#!/bin/bash

#Standard Minecraft
cd /home/minecraft/server/
while true; do
exec java -Xmx4096M -Xms1024M -jar server.jar nogui
done;

And just for security reasons, you should never run your mc server as root - create another user for it with limited permissions and add something like user=minecraft below the SERVICE tag in the init startscript