Finding Case-Insensitive Duplicates

terminal_gist1.md

Finding Case-Insensitive Duplicates

• By Todd A. Jacobs: https://stackoverflow.com/a/12937971/3711707

This will give you a list of duplicate lines which you can then investigate further.

tr 'A-Z' 'a-z' < filename | sort | uniq -d

---

• Example Data File: numbers.txt

one
One
oNe
two
three

> 'A-Z' 'a-z' < numbers.txt | sort | uniq -d
> one

• You could then grep for related line numbers like so:

grep --ignore-case --line-number one numbers.txt