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Forum: Shell Programming and Scripting 04-20-2014

Delete lines from file based on condition

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awk -v d="$(date -d '1 days ago' '+%h %d')" 'NR...

awk -v d="$(date -d '1 days ago' '+%h %d')" 'NR == FNR {if($0 !~ "^"d) {next}; n = (n == "") ? FNR : n; next} FNR >= n' messages-2 messages-2 > messages-2.tmp && mv messages-2.tmp messages-2

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