Remove duplicates from csv file linux. However in this case all the rows with duplicate values for column1 need to excluded from the output. Types of Duplicates Jul 3, 2020 · I want to remove specific rows from a . What I am trying to do is to: 1) Remove duplicate rows from the file, however, I need to check multiple columns as the criteria for what consists as a duplicate. So, the next time you find yourself wrestling with a messy CSV file, remember these handy Awk scripts. Aug 20, 2014 · 3 I will be combining a number of CSV files. I need to remove lines where content of 2nd and 3rd column is not unique, and deliver the material to the standard output. I actually have 250 duplicates in my file that in original have 15000 rows Mar 28, 2021 · Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use. Mar 31, 2020 · Append the current line to the hold space (HS) and if it is a duplicate, remove it. g. Example input: irrelevant;data1;data2; May 6, 2016 · How to remove duplicate rows from a file? Ask Question Asked 9 years, 10 months ago Modified 7 years, 2 months ago there are solutions to remove duplicate records which retain one of the duplicate records as in this SO question. These can occur in various scenarios such as log files, text files, command outputs, or database records. Mar 24, 2017 · Learn how to remove duplicate lines from a text file using various methods and tools in Unix/Linux systems. Oct 15, 2012 · 2 Given n csv files where they add up to 100 GB in size, I need to remove duplicate rows based on the following rules and conditions: The csv files are numbered 1. Follow our step-by-step guide for a clean data set! Mar 18, 2024 · In this article, we’ve first discussed when we want to remove duplicate lines from a file without sorting. Try out some of the commands on your own system, and use whichever one is most convenient for your scenario. Aug 22, 2014 · I have a csv separated with ;. At the end of the file, swap to the HS, remove the first character (which is a newline artifact) and print the result. Dec 16, 2025 · In this blog, we’ll explore multiple methods to remove duplicates, from simple one-liners to advanced techniques for edge cases (e. The first column is a string key, 2 rows are considered dup if their first columns are the same. How do I do that? Dec 11, 2021 · It contains a number of duplicates that I need to remove (keeping one instance of the record). csv which works well for examples like 2015,Leaf,Trinity,Printing Plates,Magenta,TS-JH2,John Amoth,Soccer, Duplicate Basics What are Duplicates? In the context of Linux and data processing, duplicates refer to repeated or identical entries in a dataset. Mar 13, 2015 · The reason the myfile. csv is not changing is because the -u option for uniq will only print unique lines. csv | cut -d , -f 11 | sort -u | wc -l' to skip the header line, access a list of cities, sort and remove duplicates, and count the output. Understanding how to identify and manage duplicates is crucial for efficient data manipulation and system administration. csv --o deduped-file. csv to n. In this file, all lines are duplicates so they will not be printed out. Based on Remove duplicate entries from a CSV file I have used sort -u file. Includes business/enterprise migration tips, troubleshooting, and a safety checklist. Whether you need to remove duplicates based on entire rows or specific columns, the scripts provided here will help you get the job done. 1 day ago · Step-by-step: export passwords from Google Password Manager, import into a third-party password manager, verify everything, and delete the risky CSV file. 5 days ago · Hint Run 'tail -n +2 tabletennisfact6. . Sep 16, 2025 · Learn how to efficiently remove duplicate rows or specific lines from a CSV file in Linux by using a simple bash script. 4 days ago · Quick reference for sorting text lines with sort in Linux A powerful Python tool for managing your Spotify playlists with advanced features like CSV importing, duplicate removal, and detailed playlist analysis. , preserving order, handling case sensitivity, or large files). csv file (named 'mydata') on Linux using values under a specific variable 'SAMPLE'. Then, we’ve addressed the compact awk one-liner solution through an example. csv, and each file is about 50MB in size. Sep 22, 2025 · In this guide, we’ll show various command line examples that you can use to delete duplicate lines from a text file. mhg sai cbs oat phw wug lgu mvb xhd yhd cct uyl oms zwe qvw