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Re:When your data doesn’t fit in memory: the basic techniques by emj on Monday November 11, 2019 @05:52PM (#21509789)
You can easily change that first command with muscle memory. That's why I use cat $file| but I guess <$file would work too.
Re:When your data doesn’t fit in memory: the basic techniques by emmelaich on Monday November 11, 2019 @07:12PM (#21510283)
As per James Taylor's comment above, using cat means you can easily replace it with head e.g. for testing.

And not change anything else in the pipeline.