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How to Merge Two Files in Linux

Are you a Linux user looking for an easy way to merge two files into one? Well, you’ve come to the right place! In this blog post, we’ll show you exactly how to merge two files in Linux in just a few simple steps. Let’s go!


Merging two files in a Linux system is simple, efficient, and most importantly, entirely possible. With the assistance of the command-line utility programs known as “sed” (stream editor) and “join” (file joiner), it is possible to easily merge any two given files into a single new file. This process can be done entirely from the command line and is relatively fast depending on the total size of both of the given files.

In this article, we will discuss how to quickly merge two files in Linux using sed and join. We will walk through each step for creating a single merged file out of two existing ones on a Linux system. By following these steps carefully, you should have no difficulty succeeding at this task.

Overview of File Merging

The process of file merging is the combining of multiple text files or other data into a single file. This can be useful when working with large datasets or various text documents. Combining these files into a single file saves time, effort and helps keep data more organized.

File merging in linux involves using a variety of commands from the terminal window to combine multiple files into one. By understanding the syntax and parameters used, you’ll be able to quickly merge two or more files using only a few simple commands.

Before attempting a file merge, it’s important to remember that some aspects must be taken into consideration. Text encoding must match for each file being merged (e.g. ASCII vs UTF-8). Additionally, all your destination files should have positions and formatting that are considered suitable for the type of content being put inside them (i.e they should be set on compatible positions).

By following the proper steps, you will successfully merge two or more linux-compatible files together into one cohesive document that is ready for further manipulation or archiving if necessary. With a clear plan of action in place and an understanding of basic command syntax, you can easily complete this task with confidence.

Benefits of File Merging

Merging files in Linux can prove to be a useful tool for anyone who works with large amounts of data or systems that need organizing. It involves combining two separate files into one, which has a number of benefits.

The main benefits of merging files in Linux include more efficient space utilization, allowing users to better organize their data into fewer documents and a simpler command structure overall. File merging also allows for easier searches as the user only needs to look through one file instead of many. Additionally, when multiple files need to be consistent with each other and kept up-to-date without duplication time and energy is saved by having them merged together.

Another benefit of merging files in Linux is the ability to produce reports from multiple sources quickly and accurately. This helps users make informed decisions faster and with more reliable information at their fingertips. It also makes it easier for those looking through the file later on as the transferability between different operating systems makes it easy for sharing information without having to search for multiple versions across varying platforms.

Overall, file merging in Linux can provide powerful advantages that help users take control of their systems and increase efficiency while taking up fewer resources overall since they will now have only one document rather than multiple individual ones that are all related but still not combined.

Different Methods of File Merging

File merging is a common task that many users have to perform. This article will discuss various methods of merging two files in Linux.

The most basic way of merging two files is to use the cat command, which combines the contents of both files and keeps them intact without changing any text. To use cat, type the following command:

cat file1.txt file2.txt > merged_file.txt

This will create a new file called “merged_file” which contains the contents of both “file1” and “file2” combined in sequence. If you don’t want to create a new file and instead merge the two existing files together, you can use this command:

cat file1.txt >> file2.txt

The >> operator allows you to append the contents of one file to another existing file. This will cause all contents of “file1” to be added to the end of an existing “file2”, making them merged together as one single document. This method is useful for cases where the order in which content should be added should not be altered from its original orientation (e.g.: code structure).

Another method available for merging two files is using join . The join command works by line-by-line combining data from participating files based on fields that match with each other according to given criteria; fields are broken up by some delimiting character (such as commas or spaces) that indicate when one field ends and another begins within a line itself. To make use of join, type out this command:

joint -t , Filed1=’filename1′ Field2=’filenameFile’ File3=’newMergedFileName’>

This would combine elements present in filename 1 and filename 2 line by line based on common fields indicated by commas; this newly created “merged” File3 would contain both data sets combined now into one new entity as a consequence of performing this operation successively across all entries present in either name 1 or 2!

Merging Two Files in Linux Using the Cat Command

The Cat command in Linux is a useful tool that allows a user to concatenate or merge two different files together. This command has many uses and provides the user with an easy way to combine two files into one.

To use the cat command, open up your terminal in Linux and type “cat” followed by the two file names you wish to merge. It should look something like this: cat firstFile.txt secondFile.txt > mergedFiles.txt .

In this example, the cat command will take both of the files, firstFile.txt and secondFile. txt, and will merge them together into one single file called mergedFiles.txt . However, if you want to combine multiple files that are not located in the same directory, then you can specify the path for each individual file with “~” for home directory or absolute paths for other directories: cat /home/username/directory/filename1 /home/username/directory/filename2 > outputfileName

If you prefer to view all of your combined files while still keeping their separate identities then you can use the “less” command which will show output on screen allowing you to scroll through it without actually writing it out: less filename1 filename2 > outputfileName
You can even create a table view of three or more combined text files using column -t as follows: column -t filename1 filename2 filename3 > outputfileName
Using this powerful linux tool allows you to quickly and easily control how your merged text data appears within just a few lines of code!

Merging Two Files in Linux Using the Join Command

The join command is a Unix utility that allows you to combine the contents of two separate files into one. This is useful if you have two files containing data records relating to a particular subject such as persons or products, and you need to merge the records together into a single file. To use the join command in Linux, all you need is access to a terminal window.

First, make sure you have the two files that you want to merge available for manipulation in the directory where your terminal window is open. You may need to move or copy them from another location first. Note also that both files should be sorted numerically or alphabetically so that values from both can be merged in order correctly.

Once both files are ready, enter “join” followed by the name of each file with its path into your terminal window and press enter:
join <file_1> <file_2>
If necessary, set any options for this operation by adding command-line arguments before typing enter again:
join -<options> <file_1> <file_2>
For example, use “-v” as an option if you want entries which do not appear in either of your original file outputs also included in your merged output (i.e., “join -v 1 <file_1> <file_2>”). At this stage, all that’s left to do is send the appropriate input and output streams for more sophisticated joins (if needed). For example, send only select fields of each row using “-o” prior to completing the command:
join -o 1.3 2.4 <File1><File2>.
You can check for information about these options online with specific help resources like “man join” which will display a manual page summarizing how join works and how it can be used effectively in Linux. When completed successfully, your new combined file will contain all data from both of your base files merged into one!

Merging Multiple Files in Linux

Merging multiple files in Linux can be useful if you need to combine multiple text documents into a single file. The easiest way to do this is with a powerful command-line tool called “cat”. Cat is short for “concatenate” and it allows you to merge multiple files, even in different subdirectories or on different drives.

In order to use the cat command, you need to open up a terminal and navigate to where the files that you wish to join are stored. Then, you can use the command:
cat file1.txt file2.txt > merged_file.txt“`
This command will combine two text documents (file1.txt and file2.txt) and place the results into a new text document called merged_file.txt. If there are more than two files that need merging, simply list all the files after “cat”. This will allow you to quickly join together several documents into one large document without having to manually copy/paste them together!

If applicable, there are also options available which allow users to merge specific parts of each of their own text documents as well as concatenate binary files (and more). For more detailed information on how these additional commands work, please refer to your distribution’s documentation or contact technical support staff at your provider if necessary.


In conclusion, merging two files together in Linux is a relatively straightforward process made easy with the use of commands like cat, paste, join, and sort. No matter which method you choose to utilize, remember that it’s always helpful to test before making changes to your data. There are several other tools available for more sophisticated needs such as merging multiple files together based on the contents of each file. And if all else fails, there’s always the manual approach—copy and paste each file into a new file one line at a time.

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