Linux 特殊字符用于用户命令行bash环境处理数据,达到一种命令简化使用的功能
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特殊重定向用法:将标准错误重定向到标准输出,即标准错误和标准输出一样,从重定向到文件中,这个功能有3种实现命令方法:
[root@oldboy data]# echo "I am oldboy"1>>oldboy.txt 2>>oldboy.txt
[root@oldboy data]# echo "I am oldboy"&>>oldboy.txt
[root@oldboy data]# echo "I am oldboy">>oldboy.txt 2>&1
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