本地主机上的 shell 正在对 $NOW 和 $BACKUP 进行变量替换，因为EOI"没有被转义.替换

The shell on the local host is doing variable substitution on $NOW and $BACKUP because the "EOI" isn't escaped. Replace

 ssh tunneluser@111.222.333.444 <<EOI

与

 ssh tunneluser@111.222.333.444 <<EOI