I have a file called data.txt . I want to add the current date,

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Editorial Team

Asked: May 25, 20262026-05-25T23:50:00+00:00 2026-05-25T23:50:00+00:00

I have a file called data.txt.

I want to add the current date, or time, or both to the beginning or end of each line.

I have tried this:

awk -v v1=$var ' { printf("%s,%s\n", $0, v1) } ' data.txt > data.txt

I have tried this:

sed "s/$/,$var/" data.txt

Nothing works.

Can someone help me out here?

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Editorial Team · Answer 1 · 2026-05-25T23:50:01+00:00

Editorial Team

How about :

cat filename | sed "s/$/ `date`/"

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