A Bash Script Run Over SSH Will Not Keep Running

[coderrquitsreality]

So I have a MC server. ok.

When I ssh into it, no problems.

When I run the bash script, it runs.

When I close command prompt, it stops.

Is there a way I can keep my server open without having command prompt open all the time?

My script:

Spoiler

umount -fR /dev/sdc1/
mount /dev/sdc1 /home/pi/MCServer/
systemctl restart smbd
echo -e "\033[1;32m Starting server..."
cd ./MCServer/nukkit
cd ./MCServer/Nukkit
sudo java -jar ./target/nukkit-1.0-SNAPSHOT.jar

 

 

[mr cheese]

Just now, TheCoder2019 said:

Is there a way I can keep my server open without having command prompt open all the time?

This is how SSH works. You open a separate terminal instance in which your commands are run, and when you close out ssh, the terminal is closed as is everything spawned in it.

The solution I've found to be easiest is using screen, which you can install through any default package manager for the most part. Once installed, you just run

screen [command you want to run]

so, in your case, I would run

screen ./script.sh

or whatever your script's name/extension is, then it'll clear the screen and spawn a new, detachable terminal instance you can disconnect from and reconnect to at will. If you disconnect from the instance (you press ctrl+a, then press d) or close out of the ssh shell, you can reconnect by running

screen -r

and you'll be good to go. As always, be sure to read up on it so you understand it well enough, but it's what I've been using to manage my Minecraft server instances over ssh for years now with very little extra hassle.

[coderrquitsreality]

2 minutes ago, DaJakerBoss said:

This is how SSH works. You open a separate terminal instance in which your commands are run, and when you close out ssh, the terminal is closed as is everything spawned in it.

The solution I've found to be easiest is using screen, which you can install through any default package manager for the most part. Once installed, you just run

screen [command you want to run]

so, in your case, I would run

screen ./script.sh

or whatever your script's name/extension is, then it'll clear the screen and spawn a new, detachable terminal instance you can disconnect from and reconnect to at will. If you disconnect from the instance (you press ctrl+a, then press d) or close out of the ssh shell, you can reconnect by running

screen -r

and you'll be good to go. As always, be sure to read up on it so you understand it well enough, but it's what I've been using to manage my Minecraft server instances over ssh for years now with very little extra hassle.

So for me I'd run

sudo apt-get install screen -y

Then run

sudo screen ~/ReNAS

Right? Am I reading that right?

[mr cheese]

6 minutes ago, TheCoder2019 said:

So for me I'd run

sudo apt-get install screen -y

Then run

sudo screen ~/ReNAS

Right? Am I reading that right?

is ReNAS the name of this script? why are you running screen as a superuser

 

19 minutes ago, TheCoder2019 said:

My script:

  Hide contents

umount -fR /dev/sdc1/
mount /dev/sdc1 /home/pi/MCServer/
systemctl restart smbd
echo -e "\033[1;32m Starting server..."
cd ./MCServer/nukkit
cd ./MCServer/Nukkit
sudo java -jar ./target/nukkit-1.0-SNAPSHOT.jar

 

 

 

[coderrquitsreality]

2 minutes ago, DaJakerBoss said:

is ReNAS the name of this script? why are you running screen as a superuser

 

 

ReNAS is the name of the script. It "ReNASes" my Pi. I need it run as superuser because the jarfile needs root for hosting on a port (19132)

[mr cheese]

Just now, TheCoder2019 said:

ReNAS is the name of the script. It "ReNASes" my Pi. I need it run as super user because the jarfile needs root for hosting on a port (19132)

in that case yes, that's what you would run

[coderrquitsreality]

8 minutes ago, DaJakerBoss said:

in that case yes, that's what you would run

I'll try it. If this returns a Boolean True and a byte array of 0x0 errors I will mark first reply as Boolean True Answer

 

[Alex Atkin UK]

15 minutes ago, TheCoder2019 said:

sudo screen ~/ReNAS

 

 

Also if you run screen with -Rd SessionName then it will allow you to easily reconnect to the active session later.

[coderrquitsreality]

@DaJakerBoss is there a raspberry pi version?

[mr cheese]

2 minutes ago, TheCoder2019 said:

@DaJakerBoss is there a raspberry pi version?

well, i mean it's telling you what to do, run apt-get update

[mr cheese]

Just now, DaJakerBoss said:

well, i mean it's telling you what to do, run apt-get update

wait a minute are you sending ssh commands over... ios shortcuts

[mr cheese]

9 minutes ago, Alex Atkin UK said:

 

Also if you run screen with -Rd SessionName then it will allow you to easily reconnect to the active session later.

if you only have one screen instance you should be okay just running screen -r because it reattaches to the last active session

[coderrquitsreality]

2 minutes ago, DaJakerBoss said:

wait a minute are you sending ssh commands over... ios shortcuts

yes! Also here, I ran it... too bad I can't see console live

[mr cheese]

Just now, TheCoder2019 said:

yes!

...is that safe because i do not endorse this

[Alex Atkin UK]

3 minutes ago, DaJakerBoss said:

if you only have one screen instance you should be okay just running screen -r because it reattaches to the last active session

True, but its something I wish I had known when I first started using screen.

[coderrquitsreality]

1 minute ago, DaJakerBoss said:

...is that safe because i do not endorse this

I assume it is, why? I'm not signed into iCloud or anything

Also see edit above 

[mr cheese]

1 minute ago, TheCoder2019 said:

I assume it is, why? I'm not signed into iCloud or anything

Also see edit above 

you could just install termius its a free ssh app and it's an actual terminal...

[coderrquitsreality]

Just now, DaJakerBoss said:

you could just install termius its a free ssh app and it's an actual terminal...

Well, umm... school mdm and I can't turn my PC on at 2:17 AM, kinda don't wanna get caught

[mr cheese]

Just now, TheCoder2019 said:

Well, umm... school mdm and I can't turn my PC on at 2:17 AM, kinda don't wanna get caught

hey, if youre comfortable with it, go for it. anyways now that you've updated your apt lists just try to install screen again and go from there

[coderrquitsreality]

2 minutes ago, DaJakerBoss said:

hey, if youre comfortable with it, go for it. anyways now that you've updated your apt lists just try to install screen again and go from there

Oh god, I may have to sudo reboot...

[mr cheese]

1 minute ago, TheCoder2019 said:

Oh god, I may have to sudo reboot...

this is why you should use an actual shell when doing these kind of things. it's pretty likely it didn't get to finish what it was doing and got stuck. in the future... don't use shortcuts for ssh...

[coderrquitsreality]

7 minutes ago, DaJakerBoss said:

this is why you should use an actual shell when doing these kind of things. it's pretty likely it didn't get to finish what it was doing and got stuck. in the future... don't use shortcuts for ssh...

Do I have a bricked OS now? Please say no...

I can probably use an old laptop

 

EDIT: well do I reboot now?

 

[coderrquitsreality]

48 minutes ago, DaJakerBoss said:

this is why you should use an actual shell when doing these kind of things. it's pretty likely it didn't get to finish what it was doing and got stuck. in the future... don't use shortcuts for ssh...

Ayyy! I'll try it and let you know!

EDIT: Well every time I run my script Screen decides to terminate itself

EDIT 2: I ended up using TMUX instead... I found it easier to use...