linux - Linux命令 `args`中的 `ps ao args`到底是什么意思？

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在 ps 的手册页中，我发现-a意思是:

Select all processes except both session leaders (see getsid(2)) and processes not associated with a terminal.

和-o意思是

User-defined format. format is a single argument in the form of a blank-separated or comma-separated list, which offers a way to specify individual output columns. The recognized keywords are described in the STANDARD FORMAT SPECIFIERS section below. Headers may be renamed (ps -o pid,ruser=RealUser -o comm=Command) as desired. If all column headers are empty (ps -o pid=-o comm=) then the header line will not be output. Column width will increase as needed for wide headers; this may be used to widen up columns such as WCHAN (ps -o pid,wchan=WIDE-WCHAN-COLUMN -o comm). Explicit width control (ps opid,wchan:42,cmd) is offered too. The behavior of ps -o pid=X,comm=Y varies with personality; output may be one column named "X,comm=Y" or two columns named "X" and "Y". Use multiple -o options when in doubt. Use the PS_FORMAT environment variable to specify a default as desired; DefSysV and DefBSD are macros that may be used to choose the default UNIX or BSD columns.

但是args有什么作用？在此命令中意味着什么？

注意args不是其他任何内容的占位符，只有 4 个字符:a + r + g + s

Answer 1

args 是 -o 标志的选项之一，意思是“将命令及其所有参数显示为字符串。来自 man page :

   args        COMMAND   command with all its arguments as a string.
                         Modifications to the arguments may be shown.
                         The output in this column may contain spaces.
                         A process marked <defunct> is partly dead,
                         waiting to be fully destroyed by its parent.
                         Sometimes the process args will be unavailable;
                         when this happens, ps will instead print the
                         executable name in brackets.  ...