Files that contain the .tgz file extension are TAR archive files that have been compressed using the Gnu Zip file compression software.When a user has a large volume of files that they want to compile into a single file archive, they can do so using the TAR file archive format. However, the TAR format does not compress the files in its file archive.
To compress a TAR file the user must also use a file compression utility. When a user uses the Gnu Zip file compression software to do this, the compressed TAR file is saved with the .tgz file extension. This reduces the file size of the archive file, thereby saving disk space and making the file easier to distribute or download.
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