cat EOF的追加与覆盖

一、覆盖

#!/bin/bash

cat << EOF > /root/test.txt

Hello!

My site is www.361way.com

My site is www.91it.org

Test for cat and EOF!

EOF

二、追加

覆盖的写法基本和追加一样，不同的是单重定向号变成双重定向号。

#!/bin/bash

cat << EOF >> /root/test.txt

Hello!

My site is www.361way.com

My site is www.91it.org

Test for cat and EOF!

EOF