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来源: 互联网 发布时间：2017-02-24
本文导语: 请问linux下命令参数前加-和不加有什么差别，比如ps -a 和ps a 请前辈指点 | Note that "ps -aux" is distinct from "ps aux". The POSIX and UNIX standards require that "ps -aux" print all processes owned by ...
请问linux下命令参数前加-和不加有什么差别，比如ps -a 和ps a
请前辈指点
请前辈指点
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Note that "ps -aux" is distinct from "ps aux". The POSIX and UNIX standards require that "ps -aux" print all processes owned by a user named "x", as well as printing all processes that would be selected by the -a option. If the user named "x" does not exist, this ps may interpret the command as "ps aux" instead and print a warning. This behavior is intended to aid in transitioning old scripts and habits. It is fragile, subject to change, and thus should not be relied upon.
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