\newline在bash下的特殊用法

在ABS中看到一个例子：

# echo "This will print \

as one line."

这个echo仅仅会输出一行，不是很理解，查了一下bash的manual，原来这是一个特殊用法：

3.1.2.1 Escape Character

A non-quoted backslash ‘\’ is the Bash escape character. It preserves the literal value of the next character that follows, with the exception of newline. If a \newline pair appears, and the backslash itself is not quoted, the \newline is treated as a line continuation (that is, it is removed from the input stream and effectively ignored).

在双引号中也提到了newline，从实际例子中来看，处理方法是一样的。