"sed" command to remove a line that match an exact string on first word

Dani Polo Published at Dev

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Dani Polo

I'm working in a small bash script. I need to remove an entire line that match an exact word in only the first word of the line.

That's how the text file looks:

John is a dumb
Maria is awesome
Toni and Maria are funny

I want to remove the just the second line.

Right now, I can match the exact word "maria" but it removes the third line too:

sed -i "/\b\(maria\)\b/d" file.txt

How to specify just the first word?

Thanks!

miken32

Currently you are looking for "maria" surrounded by a word boundary (represented by \b.) Instead look for "maria" preceded by the start of line (represented by ^.) Note I've also removed unnecessary parentheses and added the /I flag, which will make the search case-insensitive. Your original wouldn't have matched "Maria".

sed -i "/^maria\b/Id" file.txt

Edit: fixed case insensitive flag to I instead of i!

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edited at2020-10-23

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