Is there a way to 'uniq' by column?

Is there a way to 'uniq' by column?

linux shell sorting uniq

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How to sort an array in Bash

arrays bash shell sorting

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How could the UNIX sort command sort a very large file?

shell sorting

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Exclude all permission denied messages from "du"

shell sorting warnings suppress-warnings du

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Sort & uniq in Linux shell

linux shell sorting uniq

shell

Sorting on the last field of a line

linux shell sorting

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How can I sort file names by version numbers?

bash sorting shell version

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Sort CSV file based on first column

bash shell sorting unix csv

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Sort by number of occurrences

bash shell sorting scripting

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UNIX sort ignores whitespaces

linux shell sorting locale

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How to sort a text file according to character code or ASCII code value?

linux bash shell unix sorting

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Sort a tab delimited file based on column sort command bash [duplicate]

linux bash shell sorting

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sort unique urls from log

shell sorting logging uniq

shell

How can I sort by first column textually and then by the second numerically with 'sort'?

linux shell unix sorting

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WordCount: how inefficient is McIlroy's solution?

algorithm shell sorting word-frequency knuth

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