@简单脚本测试--date的一些用法@

cat data.sh

#!/bin/bash

echo "Today is `date +%Y%m%d`!"

echo "Yesterday is `date --date='1 day ago' +%Y%m%d`!"
echo "Yesterday is `date --date='1 days ago' +%Y%m%d`!"
echo "Yesterday is `date --date='-1day' +%Y%m%d`!"

echo "Tomorrow is `date --date='+1 day' +%Y%m%d`!"

echo "Today is `date +%Y-%m-15`!"

echo "Today is `date --date='-1 month'`"
echo `date --date='-1 month' +'Last month was %B?'`

echo "`date --date="$(date +%Y-%m-15) -1 month" +'Last month was %B!' `"

注意：$(date +%Y-%m-15) -1 month 这个是个变量，所以必须用（“”）括起来，尽管最外面有（“”），但是还是不能够换成（‘’）

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注意：

%B locale's full month name (e.g., January) 【显示月的名字】

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[oracle@SOR_SYS~]sh date.sh

Today is 20110815!
Yesterday is 20110814!
Yesterday is 20110814!
Yesterday is 20110814!
Tomorrow is 20110816!
Today is 2011-08-15!
Today is Fri Jul 15 22:41:29 CST 2011
Last month was July?

Last month was July!

ps：

今天又发现了一个和--date用法相同的参数，也就是-d

eg：date -d '1 month ago'

Sun Sep 11 16:32:46 CST 2011

date -d yesterday +%Y%m%d
20111010