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I just tried this and it appears that sed only runs the command once and thus all the lines go with the same time

Baruch Even
– Baruch Even

2022-03-01 08:35:54 +00:00
Commented Mar 1, 2022 at 8:35
Yeah, that shell command interpolation is only going to be run once before sed starts. You can use the e command in GNU sed to actually execute the date command for every line of the file. See my answer: stackoverflow.com/a/73723738/229247

Paul Wheeler
– Paul Wheeler

2022-09-14 22:19:37 +00:00
Commented Sep 14, 2022 at 22:19

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