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SSID 1: WiFi1 SSID 2: WiFi1 SSID 3: WiFi1 SSID 40: WiFi1 So for this I tell it Click the "Remove Duplicate Lines" button and watch these duplicate lines become one. Just paste and compare. The application is backed by two Is there any way to check if some of this appears twice in the document? The two basic approaches to this would probably be to either write a script or use a third-party tool to compare lines NOTE for anyone looking to get all duplicates: depending on your uniq version or platform, uniq -d might only output one copy per duplicated line. I tried many ways but it's long and not efficient. Discover effective methods to remove duplicate lines from text files on various platforms. We’ll cover multiple methods, from simple one This tutorial explains how to find duplicate lines in a file using PowerShell, including an example. Remove duplicate lines from text-based files Discussion in ' Scripting ' started by Thomas Dubreuil, Jun 8, 2019. 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