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Running a remote script with automatic options

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# 1  
Old 12-26-2016
Running a remote script with automatic options
I'm trying to run a script that will remotely copy another script to remote host and run copied script to remote server with automatic options-

Code:
#! /bin/bash

HOSTNAME="1 2"
for HOST in $HOSTNAME;
do
        scp diskFrag.sh login@$HOST:/home/login
        sleep 30
        ssh login@$HOST chmod 777 /home/login/diskFrag.sh
        sleep 10
#        ssh login@$HOST /home/login/diskFrag.sh
        ssh login@$HOST echo "n e 1 1 +40G w y" | /home/login/diskFrag.sh
#        ssh login@$HOST printf 'n\ne\n1\n1\n+40\nw\ny' | /home/login/diskFrag.sh
        sleep 2
done

exit 0

This script I'm trying to copy and run it on another remote host-

Code:
#! /bin/bash

sudo su root

DELAY=3

fdisk -l
sleep $DELAY
fdisk /dev/sdb
sleep $DELAY
mkfs -t ext4 /dev/sdb
sleep $DELAY
mkdir /data
sleep $DELAY
mount -t ext4 /dev/sdb /data
sleep $DELAY
echo "/dev/sdb            /data       ext4      defaults         0 0" >> /etc/fstab
sleep $DELAY
mount -a
sleep $DELAY
df -T

exit 0

Auto options are not working given in first code -
Code:
ssh login@$HOST echo "n e 1 1 +40G w y" | /home/login/diskFrag.sh

Please advise some smooth way or rectification in the script to achieve it.
# 2  
Old 12-26-2016
I can only strongly discourage you from "automatically" tampering with any disk layouts / file systems! Any unexpected / unintended behaviour may result in disasterous results! On top, tasks like these won't usually be done umpteen times a day, so the value of automation might be dubious.

For your actual question: the input seems to be for fdisk to create a new partition and write it. But: the local shell will interpret the redirection operator and run the script locally; on the remote host just the echo command will executed and output to stdout i.e. the terminal.
- try enclosing the entire command list in double quotes.
- supply the fdisk commands as positional parameters and in the script echo them into fdisk.
This User Gave Thanks to RudiC For This Post:
rbatte1
# 3  
Old 12-26-2016
/home/login/diskFrag.sh needs to change.

First off, there are no read statements in the script. When you echo to a script via a pipe it has to read from stdin what you echo.

Second, there is no place in the script that uses any options. It looks like you are adding the device /dev/sdb and mounting it as a disk. None of those commands are using any other "options" that I can see.

So, you are sending commands to a "deaf" script that would not "know how" to do anything with those options anyway.

Please provide us with what you want to have that script do and together we can work out options. As things stand there is no way to know what you want.

RudiC's commnets are spot on.
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