How to extract filename.tar.gz file

I want to extract an archive named filename.tar.gz.

Using tar -xzvf filename.tar.gz doesn't extract the file. it is gives this error:

gzip: stdin: not in gzip format
tar: Child returned status 1
tar: Error exit delayed from previous errors

If file filename.tar.gz gives this message: POSIX tar archive, the archive is a tar, not a GZip archive.

Unpack a tar without the z, it is for gzipped (compressed), only:

mv filename.tar.gz filename.tar # optional
tar xvf filename.tar

Or try a generic Unpacker like unp (https://packages.qa.debian.org/u/unp.html), a script for unpacking a wide variety of archive formats.

determine the file type:

$ file ~/Downloads/filename.tbz2
/User/Name/Downloads/filename.tbz2: bzip2 compressed data, block size = 400k

As far as I can tell, the command is correct, ASSUMING your input file is a valid gzipped tar file. Your output says that it isn't. If you downloaded the file from the internet, you probably didn't get the entire file, try again.

Without more knowledge of the source of your file, nobody here is going to be able to give you a concrete solution, just educated guesses.

I have the same error the result of command :

file hadoop-2.7.2.tar.gz

is hadoop-2.7.2.tar.gz: HTML document, ASCII text

the reason that the file is not gzip format due to problem in download or other.

It happens sometimes for the files downloaded with "wget" command. Just 10 minutes ago, I was trying to install something to server from the command screen and the same thing happened. As a solution, I just downloaded the .tar.gz file to my machine from the web then uploaded it to the server via FTP. After that, the "tar" command worked as it was expected.

Internally tar xcvf <filename> will call the binary gzip from the PATH environment variable to decompress the files in the tar archive. Sometimes third party tools use a custom gzip binary which is not compatible with the tar binary. It is a good idea to check the gzip binary in your PATH with which gzip and make sure that a correct gzip binary is called.

A tar.gz is a tar file inside a gzip file, so 1st you must unzip the gzip file with gunzip -d filename.tar.gz , and then use tar to untar it. However, since gunzip says it isn't in gzip format, you can see what format it is in with file filename.tar.gz, and use the appropriate program to open it.

Check to make sure that the file is complete. This error message can occur if you only partially downloaded a file or if it has major issues. Check the MD5sum.

The other scenario you mush verify is that the file you're trying to unpack is not empty and is valid.

In my case I wasn't downloading the file correctly, after double check and I made sure I had the right file I could unpack it without any issues.

So, basically the seemingly tar.gz file is not really in the format it should be. This can be ascertained using file Linux command. Example, for a genuine .tgz file, the command output will be as below:

root@f562353fc1ab:/app# file kafka_2.13-2.8.0.tgz 
kafka_2.13-2.8.0.tgz: gzip compressed data, from FAT filesystem (MS-DOS, OS/2, NT), original size modulo 2^32 75202560

So, the source from where you received the file hasn't sent it in the correct format. If you have downloaded the supposedly .tgz file from a URI, may be the URI is wrong. In my case, I faced the same issue while extracting kafka binary (.tgz file). Turns out, that the URI to wget was incorrect. At least for kafka, to get the correct download link, from the downloads page (https://kafka.apache.org/downloads.html) , we must traverse to the page that is highlighted by the link representing the binary. Once we are in that page, we will get the exact link to download the binary. Also, during download, wget displays the type of the file that will be downloaded. It will print something like this to indicate the type.

Length: unspecified [text/html] --> Incorrect URI.

Length: 71403603 (68M) [application/octet-stream] --> Correct URI.