mac shell 初学 变量输入输出

#! /bin/bash ## This my first test shell ## Writen by Normanyang 2015-12-29 touch 1.sh echo 'hello world' date echo '一天前日期是'`date -v -1d "+%Y:%m:%d"` date -v +1d "+%Y%m%d" date -v +1m "+%Y%m%d" a=1 b=

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