我有一个.gtar文件，我想提取它，但它没有被提取。
以下是我尝试过的方法及其输出。我应该包含一堆文本文件。
$ gtar -xf file.gtar
gtar: This does not look like a tar archive.
gtar: Skipping to next header.
gtar: Exiting with failure status due to previous errors.
$ gtar -xzf file.gtar
gzip: stdin: not in gzip format
gtar: Child returned status 1
gtar: Error is not recoverable: exiting now
$ gunzip -c file.gtar | tar xvf -
gzip: file.gtar: not in gzip format
tar: This does not look like a tar archive
tar: Exiting with failure status due to previous errors
$ tar -xzf file.gtar
gzip: stdin: not in gzip format
tar: Child returned status 1
tar: Error is not recoverable: exiting now
$ file file.gtar
file.gtar: HTML document, ASCII text, with very long lines, with no line terminators
谁能建议一些方法来提取它？