4

I am trying to execute the script file sc.sh on remote machine user@remote-01 using ssh. I also need to pass the arguments while executing this ssh command. So that i have to use those arguments in sc.sh. This is my script which I am trying to execute

    var1=True
    var2=False
    var3=True

    sshpass -p 'pswd' ssh user@remote-01 "bash -s" < /home/user/sc.sh

My sc.sh looks like:

    if var1 -eq True; then
       echo "Todo"
    fi

    if var2 -eq True; then
       echo "Todo"
    fi

    if var3 -eq True; then
       echo "Todo"
    fi

    ..... so on

How can i pass var1, var2, var3 as arguments and use them in my script as above?

3 Answers 3

1

This has previously been answered in question.

however what you would want to probably do will be something like the following.

sc.sh

#!/bin/bash

var1=$1
var2=$2
var3=$3

if $var1 -eq True; then
   echo "Todo1"
fi

if $var2 -eq True; then
   echo "Todo2"
fi

if $var3 -eq True; then
   echo "Todo3"
fi

then run the following command

ssh user@remote-01 'bash -s' < test.sh true true true

arguments in BASH can be referenced by $number e.g. $1

1

Finally, got the solution by trying many trial and error attempts.

 var1="True"
 var2="False"
 var3="True"

 sshpass -p 'pswd' ssh user@remote-01 "bash -s" < /home/user/sc.sh "$var1 $var2 $var3"

And should use as follows in sc.sh

if [ "$1" = "True" ]; then
   echo "Todo"
fi
if [ "$2" = "False" ]; then
   echo "Todo"
fi
if [ "$3" = "True" ]; then
   echo "Todo"
fi
0

Here we pass the variables var1/var2/var3 as env variables on the ssh command line which then become available to the bash code on the remote m/c.

var1="$var1" var2="$var2" var3="$var3" \
   sshpass -p 'pswd' ssh user@remote-01 "bash -s" < /home/user/sc.sh

The contents of sc.sh will be:

if [ "$var1" = True ]; then
   echo "Todo"
fi

if [ "$var2" = True ]; then
   echo "Todo"
fi

if [ "$var3" = True ]; then
   echo "Todo"
fi

..... so on
3
  • 1
    This is cleaner than export:ing all three but not fundamentally different.
    – tripleee
    Apr 20, 2017 at 7:41
  • The difference lies in the fact that these are locally global to the ssh and it's children. The rest of the code don't have a clue about them and that's the difference compared to blanket export-ing.
    – user218374
    Apr 20, 2017 at 7:53
  • "locally global"? (-: Yeah, just pointing out that both would work, and if the OP's script is small, it might be a simpler change to just export the variables.
    – tripleee
    Apr 20, 2017 at 7:55

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