How to extract specific file(s) from tar.gz

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http://unix.stackexchange.com – How can we extract specific files from a large tar.gz file? I found the process of extracting files from a tar in Untar only a certain number of files from a large tarball but, when i tried the mentioned command there, i got the error: $ tar --extract --file={test.tar.gz} {extract11} tar: {test.tar.gz}: Cannot open: No such file or directory tar: Error is not recoverable: exiting now How do i extract a file from tar.gz then? (HowTos)