#!/bin/sh
echo "Input date with format yyyy mm dd:\c"
read year month day
echo "Today is $year/$month/$day, right"
echo "press enter to confirm and continue\c"
read a
echo "I know the date, bye"
注释：
#!/bin/sh 指定解析shell的类型，sh为传统shell，bash为默认使用的shell
\c这个转义字符表示，不换行，只能使用与sh类型的shell
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