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Linux - Only keep certain country data

< FileToExtract.csv awk 'BEGIN {FS=","} tolower($19)~/usa|united states/' > USAList.txt

This will only keep countries listed as USA/United States. It is not case sensative.

$19 represents the column number.

You can keep multiple countries by modifying the command, for example

/usa|united states|spain|germany/

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