bash break while loop code example
Example 1: while loop bash
while true;
do
done
Example 2: bash break for looop
break [n]
Example 3: shell loop terminating after command
The problem is that do_work.sh runs ssh commands and by default ssh reads from stdin which is your input file. As a result, you only see the first line processed, because ssh consumes the rest of the file and your while loop terminates.
To prevent this, pass the -n option to your ssh command to make it read from /dev/null instead of stdin.