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How would I display the first line of all files matching a glob? [closed]

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Closed as unclear by Alexei‭ on May 10, 2024 at 06:18

This question cannot be answered in its current form, because critical information is missing.

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My use case is a collection of CSV files, each with header row. What I want to know is what subset(s) of them are "union compatible", although I also want matching column names before stacking these tables.

bash

posted 8 months ago

CC BY-NC-SA 4.0

8mo ago by Alexei‭

lori‭

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What have you tried? (1 comment)

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The first line of a file is head -1. But you probably also want the file name. So something like:

for file in glob
do
    first_line="$(head -1 "$file")"
    printf "%s: %s\n" "$file" "$first_line"
done

Where glob above is something like *.csv or whatever.

posted 8 months ago

CC BY-SA 4.0

aghast‭

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