BASH help

fennectech · 2014-10-30 13:43:41

okay so i need help writing a bash script to run minecraft server i need a way to loop it can someone make me a script template that will loop over and over so i can script my server

ANOKNUSA · 2014-10-30 13:49:13

You need to loop what, exactly? Have you looked for any examples on the web? You're surely not the first person to run a Linux-based Minecraft server.

http://minecraft.gamepedia.com/Tutorial … structions
http://mywiki.wooledge.org/BashGuide/Te … and_for.29

tomk · 2014-10-30 13:57:17

Have you read the wiki's Minecraft page?

teckk · 2014-10-30 14:08:37

Adding to what others have posted.
http://mywiki.wooledge.org/BashFAQ
http://www.gnu.org/software/bash/manual/bashref.html
http://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO.html
http://linux.die.net/man/1/bash
http://www.commandlinefu.com/
http://unix.stackexchange.com

Post what you have already done.

Trilby · 2014-10-30 14:23:08

As indicated above, this question needs a lot of clarification. But to highlight why it's needs clarification, I'll post the answer to the question as it was asked:

#!/bin/bash
while :; do :; done

fennectech · 2014-10-30 15:04:19

this is the script im tryting to convert from windows batch to bash script

echo off
:start
java  -jar -Xms2000M -Xmx3000M forge-1.7.10-10.13.0.1180-universal.jar nogui -o true
@echo off
#pause
cls
echo Restarting in 5
ping -n 2 127.0.0.1>nul
cls
echo Restarting in 4
ping -n 2 127.0.0.1>nul
cls
echo Restarting in 3
ping -n 2 127.0.0.1>nul
cls
echo Restarting in 2
ping -n 2 127.0.0.1>nul
cls
echo Restarting in 1
ping -n 2 127.0.0.1>nul
cls
echo Will Now Restart!
ping -n 2 127.0.0.1>nul
goto start

EDIT
i can easily convert the java and pingsleep into what i need just dont know how to loop in a multiple line thing

Last edited by fennectech (2014-10-30 16:06:57)

olive · 2014-10-30 19:58:57

Something like:

while true ; do
    echo "Starting my server..."
    for ((n=0;n<5;n++)) ; do
        echo Restarting in $n seconds
        sleep 1
    done
done

fennectech · 2014-10-30 20:17:56

its doing it backwords i want to go
Will now restart in 5 seconds
4 seconds
3 seconds
2 seconds
1 second
WILL NOW RESTART!

but it counts up

olive · 2014-10-30 20:23:54

Type this command, and it should work.

man bash

If you insist:

while true ; do
    echo "Starting my server..."
    for ((n=5;n>0;n--)) ; do
        echo Restarting in $n seconds
        sleep 1
    done
done

fennectech · 2014-10-30 20:24:46

i played with the numbers to try to reverse it but it doesnt work

while true ; do
    echo "Starting my server..."
    for ((n=5;n<0;n--)) ; do
        echo Restarting in $n seconds
        sleep 1
    done
done

Last edited by fennectech (2014-10-30 20:25:44)

olive · 2014-10-30 20:28:38

Because, you should say n>0 (and not n<0) in the for loop (and you probably don't have typed my first command).

Last edited by olive (2014-10-30 20:29:32)

fennectech · 2014-10-30 21:10:04

@olive do you know of any good video tutorials to bash scripting?

jasonwryan · 2014-10-30 21:18:00

There are no good video turorials for bash scripting. There is, however, http://mywiki.wooledge.org/

efasckenoth · 2014-10-31 04:52:17

@fennectech: One does not learn how to program by watching video tutorials. The Linux Command Line has a decent introduction to shell scripting. Once you digested this you might consider working through The Advanced Bash Scripting Guide where you will learn everything you ever wanted to know (and lots of things you'd probably rather not know) about bash scripting.

Last edited by efasckenoth (2014-10-31 04:53:10)

jasonwryan · 2014-10-31 05:25:13

Bash Hackers on the ABS wrote:

Has a lot of information that is hard to find, but is outdated and often unsafe. To be avoided until you can filter out the good stuff.

http://wiki.bash-hackers.org/scripting/tutoriallist

efasckenoth · 2014-10-31 05:56:39

Thanks for the pointer, jasonwryan. The ABS definitely shows some age. It deals with lots of corner cases however, which can be helpful when shell scripts don't behave as expected.

olive · 2014-10-31 07:08:37

I don't know of video tutorial, I never watch them. But the wikipedia page of shell scripting: http://en.wikipedia.org/wiki/Shell_script (Look at the external links section) gives you some reference, some looks good. Once you grasp the basic, the man page of bash is the reference.

Last edited by olive (2014-10-31 07:14:12)

tomk · 2014-10-31 08:01:25

Apart from the general efforts to learn bash, can I ask why you want this on-screen countdown? What purpose does it serve?

The minecraft-server package in the AUR provides a systemd service, would you consider trying that instead?

fennectech · 2014-10-31 13:06:02

the onscreen countdown gives me a chance to do a Ctrl +C to abort the server startup squence without causing damage allowing for easy maintaince
but if i could systemd the server(with forge) that would be awesome

Arch Linux

#1 2014-10-30 13:43:41

BASH help

#2 2014-10-30 13:49:13

Re: BASH help

#3 2014-10-30 13:57:17

Re: BASH help

#4 2014-10-30 14:08:37

Re: BASH help

#5 2014-10-30 14:23:08

Re: BASH help

#6 2014-10-30 15:04:19

Re: BASH help

#7 2014-10-30 19:58:57

Re: BASH help

#8 2014-10-30 20:17:56

Re: BASH help

#9 2014-10-30 20:23:54

Re: BASH help

#10 2014-10-30 20:24:46

Re: BASH help

#11 2014-10-30 20:28:38

Re: BASH help

#12 2014-10-30 21:10:04

Re: BASH help

#13 2014-10-30 21:18:00

Re: BASH help

#14 2014-10-31 04:52:17

Re: BASH help

#15 2014-10-31 05:25:13

Re: BASH help

#16 2014-10-31 05:56:39

Re: BASH help

#17 2014-10-31 07:08:37

Re: BASH help

#18 2014-10-31 08:01:25

Re: BASH help

#19 2014-10-31 13:06:02

Re: BASH help

Board footer