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Remote ssh command not sending echo variable from a ksh script on AIX

I'm need to get the value of a variable from a remote host in a script using SSH and have to source an environment file first that does a shift at the end of its run. The command works locally and I ...
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Why is a here-string command substitution considered as a single line?

I'm experimenting with while read syntax and there is a thing I don't understand. The most basic scenario which reproduces the problem is the following: a bash script a.sh calls another script b.sh ...