You can eliminate a lot of the backslashing by using alternative delimiters: 
my $command = 'ssh ' . $node . q[ "perl -lne'm!(.*)/! && qx[su xxx -c 
+\"mkdir -p \$1\" && su xxx -c \"touch \$_\"]'] . qq[ 1>> $storageRoot
+Path_log 2>> $storageRootPath_err"];

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In reply to Re: Replacing backticks with system() and redirecting STDERR to file by jwkrahn
in thread Replacing backticks with system() and redirecting STDERR to file by siva_kumar25

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