On operating systems that support the SUS and POSIX standards, ps commonly runs with the options -ef, where "-e" selects every process and "-f" chooses the "full" output format.
在支持SUS和POSIX标准的操作系统上，ps常以选项-ef运行，其中“-e”选择每一个（every）进程，“-f”指定“完整”（full）输出格式。