Remove duplicate lines file

Please help us improve Stack Overflow. Take our short survey. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. How might I remove duplicate lines from a file? Ask Question. Asked 12 years, 5 months ago. Active 6 months ago. Viewed k times. I have a file with one column. How to delete repeated lines in a file? Improve this question. Shog9 k 34 34 gold badges silver badges bronze badges.

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The Remove Duplicate Lines option should already be selected in the drop down by default. If not, select it first. Press Save to create a new text file or copy and paste the text back into a text editor. The drop down also has other options to remove white spaces and sort the text in ascending or descending order.

Duplicate lines need to also match casing as well as content to be removed. Download TextCrawler. For some reason, information about the program has been removed from their website but thankfully the official download link is still available.

Only a setup installer is available but you can make the program portable with the help of Universal Extractor. To remove duplicate lines, browse for or drop a file onto the window, click Check and if duplicate lines are found, click Fix and choose a save name. You can also batch process a number of files at once, including in subfolders, using the File Scan tab.

Be aware though that it will automatically create. Use the mask box and add a file extension to stop everything from being processed. A dedicated command line version is also available in the package for scripts and more advanced users. Download Duplicate Lines Remover. The Offline portion of the name is to differentiate this tool from the online TextMechanic service as the two are not related. This tool is a portable executable and hosted at SourceForge. In addition to removing duplicate and empty lines, TextMechanic Offline can also delete lines containing specific text or find and replace text.

NET Framework 3. Then also press Remove Empty Lines otherwise the text will contain empty lines where duplicates have been removed.

The GNU sed maintainer felt that despite the portability problems this would cause, changing the N command to print rather than delete the pattern space was more consistent with one's intuitions about how a command to "append the Next line" ought to behave.

HOW TO? First line in a set of duplicate lines is kept, rest are deleted. P; D' delete duplicate, nonconsecutive lines from a file.