Shell script ssh login and execute command inside remote

Asked Sep 17 '20 at 19:22

Active Sep 17 '20 at 19:35

Viewed 40 times

Goal:

login to a remote system, 2) ask for user input, 3) store the first 4 characters of the input string in a file on the remote system.

What I have:

#!/bin/bash
USERNAME=someUser
HOST="host1"
SCRIPT="echo Enter the string; read -n 4 str; echo $str > file.txt"
ssh -l ${USERNAME} ${HOSTNAME} "${SCRIPT}"

Problem:

The file.txt does not contain the string- it is empty! If I echo $str after the read, it seems empty. Am I missing anything?

edited Sep 17 '20 at 19:28

Cyrus

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asked Sep 17 '20 at 19:22

user3341779

Use single-quotes, not double quotes, when assigning to `SCRIPT`. – Charles Duffy Sep 17 '20 at 19:33
Right now, the `$str` is evaluated on what `str` has during the `SCRIPT=` line. – Charles Duffy Sep 17 '20 at 19:33
perfect! thanks @CharlesDuffy – user3341779 Sep 17 '20 at 19:54

Shell script ssh login and execute command inside remote

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