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Delete every seventh line with sed

I need a sed script that deletes every seventh line in a file. I managed to do this with awk script, but I wanted to find a way to use sed for this.

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2 answers

You can try

sed 'n;n;n;n;n;n;d;'
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Sai's solution seems the best. However, if you use GNU sed and are not looking for portability, you can use the step address:

$ seq 1 10 | sed '0~3d'
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2
4
5
7
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10

The address n~mcorresponds to the entire k-th line, where k = n + m * i.

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