macos - "ps aux"有效，但 "ps -aux"无效

Question

这似乎是一个愚蠢的问题，但我一直无法找到明确的答案。

This website指出破折号是可选的

ps aux

然而， ps aux有效但 ps -aux出现错误 no user named 'x' .任何想法可能是什么问题？运行 Mac 10.8.2。谢谢

Answer 1

man ps

会给你这个:

 The biggest change is in the interpretation of the -u option, which now
 displays processes belonging to the specified username(s).  Thus, "ps
 -aux" will fail (unless you want to know about user "x").  As a conve-
 nience, however, "ps aux" still works as it did in Tiger.