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Home Operating System Linux

How to Split Large ‘tar’ Archive into Multiple Files of Certain Size

How VPS by How VPS
November 2, 2018
in Linux, Operating System
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Contents

  1. How to Join Tar Files After Splitting
  2. Conclusion

Are you worried of transferring or uploading large files over a network, then worry no more, because you can move your files in bits to deal with slow network speeds by splitting them into blocks of a given size.

In this how-to guide, we shall briefly explore the creation of archive files and splitting them into blocks of a selected size. We shall use tar, one of the most popular archiving utilities on Linux and also take advantage of the split utility to help us break our archive files into small bits.

How to Split Large ‘tar’ Archive into Multiple Files of Certain Size

Create and Split tar into Multiple Files or Parts in Linux

Before we move further, let us take note of, how these utilities can be used, the general syntax of a tar and split command is as follows:

# tar options archive-name files 
# split options file "prefix”

Let us now delve into a few examples to illustrate the main concept of this article.

Example 1: We can first of all create an archive file as follows:

$ tar -cvjf home.tar.bz2 /home/aaronkilik/Documents/* 
How to Split Large ‘tar’ Archive into Multiple Files of Certain Size

Create Tar Archive File

To confirm that out archive file has been created and also check its size, we can use ls command:

$ ls -lh home.tar.bz2

Then using the split utility, we can break the home.tar.bz2 archive file into small blocks each of size 10MB as follows:

$ split -b 10M home.tar.bz2 "home.tar.bz2.part"
$ ls -lh home.tar.bz2.parta*
How to Split Large ‘tar’ Archive into Multiple Files of Certain Size

Split Tar File into Parts in Linux

As you can see from the output of the commands above, the tar archive file has been split to four parts.

Note: In the split command above, the option -b is used to specify the size of each block and the "home.tar.bz2.part" is the prefix in the name of each block file created after splitting.

Example 2: Similar to the case above, here, we can create an archive file of a Linux Mint ISO image file.

$ tar -cvzf linux-mint-18.tar.gz linuxmint-18-cinnamon-64bit.iso 

Then follow the same steps in example 1 above to split the archive file into small bits of size 200MB.

$ ls -lh linux-mint-18.tar.gz 
$ split -b 200M linux-mint-18.tar.gz "ISO-archive.part"
$ ls -lh ISO-archive.parta*
How to Split Large ‘tar’ Archive into Multiple Files of Certain Size

Split Tar Archive File to Fixed Sizes

Example 3: In this instance, we can use a pipe to connect the output of the tar command to split as follows:

$ tar -cvzf - wget/* | split -b 150M - "downloads-part"
How to Split Large ‘tar’ Archive into Multiple Files of Certain Size

Create and Split Tar Archive File into Parts

Confirm the files:

$ ls -lh downloads-parta*
How to Split Large ‘tar’ Archive into Multiple Files of Certain Size

Check Parts of Tar Files

In this last example, we do not have to specify an archive name as you have noticed, simply use a - sign.

How to Join Tar Files After Splitting

After successfully splitting tar files or any large file in Linux, you can join the files using the cat command. Employing cat is the most efficient and reliable method of performing a joining operation.

To join back all the blocks or tar files, we issue the command below:

# cat home.tar.bz2.parta* >backup.tar.gz.joined

We can see that after running the cat command, it combines all the small blocks we had earlier on created to the original tar archive file of the same size.

Conclusion

The whole idea is simple, as we have illustrated above, you simply need to know and understand how to use the various options of tar and split utilities.

You can refer to their manual entry pages of to learn more other options and perform some complex operations or you can go through the following article to learn more about tar command.

Don’t Miss: 18 Useful ‘tar’ Command Examples

For any questions or further tips, you can share your thoughts via the comment section below.

Source: tecmint.com

Tags: Linux Commandslinux guidelinux vps setup guide
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