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  • ok, but does this remove dupes from an existing colon delimited string, or does it prevent dupes from being added to a string? Commented Dec 10, 2016 at 9:59
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    looks like the former Commented Dec 10, 2016 at 10:00
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    @AlexanderMills, well, the OP just asked about removing duplicates so this is what the awk call does. Commented Dec 10, 2016 at 18:59
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    The paste command doesn't work for me unless I add a trailing - to use STDIN. Commented Apr 24, 2017 at 21:11
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    Also, I need to add spaces after the -v or else I get an error. -v RS=: -v ORS=. Just different flavors of awk syntax. Commented Apr 24, 2017 at 21:56