What's the difference between the following two co开发者_如何转开发mmands. I know the output is different but what is that = sign before rss?
$ ps -orss -p 62277
RSS
111636
$ ps -o rss= -p 62277
111636
The -o
specifies that you will be listing the columns that you want displayed.
Adding an =
after the column name (rss in this case), gives you the opportunity to override the default value for the column header, you could put -o rss=ResidentSet
for example, but with an empty =
, you are saying 'no column header'.
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