引用手册页 ( man ps):
-w Use 132 columns to display information, instead of the default which is your window
size. If the -w option is specified more than once, ps will use as many columns
as necessary without regard for your window size.
When output is not to a terminal, an unlimited number of columns are always used.
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请注意,以上内容来自 BSD 联机帮助页。debian 联机帮助页更简洁/不那么具体,但类似:
-w Wide output. Use this option twice for unlimited width.
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