Assign a command to a variable - Help Post: 303035094

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Top Forums UNIX for Beginners Questions & Answers Assign a command to a variable - Help Post 303035094 by mohca2020 on Tuesday 14th of May 2019 02:53:22 PM

05-14-2019

Registered User

Assign a command to a variable - Help

Hi,

I have the script below. When i assign SSH_COMMAND to "ssh -o ConnectTimeout=2 ${SERVER} ${AS_SUDO} ${COMMANDS}" and then execute it as ${SSH_COMMAND} I get the following error:

Code:

ssh: Could not resolve hostname sudo: Name or service not known
ssh: Could not resolve hostname sudo: Name or service not known

But when I run the command directly from the script, it works as expected. The script below is running as expected. Can you guys help?

Code:

#!/bin/bash
#set -x


function usage {
    echo "USAGE: ${0} [-nsv] [-f FILE] COMMAND"
    echo "-f FILE   Use to override the default file"
    echo "-n        Use for dry Run"
    echo "-s        Use to run the command with sudo"
    echo "-v        Use for verbose"
}


SERVERFILE="/vagrant/servers"

if [[ ! -e "${SERVERFILE}" ]]; then
    echo "File ${SERVERFILE} does not exist"
    exit 0

fi

if [[ ${#} -lt 1 ]]; then
    usage
fi

if [[ ${UID}  -eq 0 ]]
then
echo "Do not execute this as root, use -s instead"
fi


while getopts 'nsvf:' opt
do
    case "${opt}" in
        n)
            DRY_RUN="true"   ;;
        s)
            AS_SUDO="sudo" ;;
        f)
            SERVERFILE=${OPTARG}  ;;
        v)
            echo "verbose mode"    ;;
    esac
done
shift "$(( OPTIND-1 ))"

COMMANDS=${*}
SSH_COMMAND="ssh -o ConnectTimeout=2 ${SERVER} ${AS_SUDO} ${COMMANDS}"

if [[ ! -z ${DRY_RUN} ]]
then
    echo "DRY RUN: ${SSH_COMMAND}"
else
    for SERVER in $(cat ${SERVERFILE})
    do
        #${SSH_COMMAND}
        ssh -o ConnectTimeout=2 ${SERVER} ${AS_SUDO} ${COMMANDS}
    done
fi

mohca2020

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LEARN ABOUT SUNOS

echo

echo(1B)					     SunOS/BSD Compatibility Package Commands						  echo(1B)

NAME

       echo - echo arguments to standard output

SYNOPSIS

       /usr/ucb/echo [-n] [argument]

DESCRIPTION

       echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output.

       echo  is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi-
       ronment variables.

       For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows:

	 o  echo your current-working-directory's full pathname

	 o  pipe the output through tr to translate the path's embedded slash-characters into space-characters

	 o  pipe that output through wc -w for a count of the names in your path.

	      example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w"

       See tr(1) and wc(1) for their functionality.

       The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be  invoked	if
       the  user  calls  echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape
       characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the  black-slashed  escape  characters,	and  ksh's
       echo() also understands a as the audible bell character; however, these commands do not have an -n option.

OPTIONS

       -n	Do not add the NEWLINE to the output.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWscpu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       csh(1), echo(1), ksh(1), sh(1), tr(1),  wc(1), attributes(5)

NOTES

       The -n option is a transition aid for BSD applications, and may not be supported in future  releases.

SunOS 5.10							    3 Aug 1994								  echo(1B)

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