With the -o flag, the ps command examines memory or the paging area and determines what the command name and parameters were when the process was created. If the ps command cannot find this information, the command name stored in the kernel is displayed in square brackets. 大概就是系统找不到相关进程信息了
------解决方案-------------------- 你应该把你完整的情况贴出来 你的描述有点不清楚
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