You will still see an error "Unexpected end of ZLIB input stream" due to the missing central directory record. To extract a zip file with jar, use the xvf option: $ jar xfv sample.zip The difference is that jar extracts files without checking the central directory signature in a zip archive. Thus you can extract a regular zip file with jar. Originally the jar command creates and extracts an archive for Java-specific class files and metadata, but JAR archives are in fact stored in the ZIP format. One option to extract a corrupted zip file is to use the jar command which comes with Java development kit (JDK). The unzip command verifies the integrity of a zip file by looking for the "end of central directory record" with a specific signature, and refuse to extract files without the signature. For example, when a (large) zip file is updated by adding a new file and deleting one existing file, these updates can easily be applied with the central directory information without scanning the entire zip file.Įach file in a zip archive is also associated with its "local file header" which contains necessary metadata about the file, such as file size, file name, etc. The main reason for including the central directory at the end of an archive is so that the archive can be updated easily. The zip archive contains a special directory called "central directory" at the end, which identifies what files are in the zip file. How Files are Stored in a Zip Archiveįor those of you who want to understand the problem better, here is a brief overview of how files are stored in a zip archive.īy design a zip archive file can store (and optionally compress) multiple files in it. In the rest of the tutorial, let's find out how to fix, or at least get round, the unzip error when a zip file is corrupted or end of the file is truncated. If this does not help, changes are that the zip file was incompletely downloaded or got corrupted on your disk somehow. So try uncompressing it with gunzip to eliminate this possibility. If you are unable to extract files from a zip file and instead getting the error "End-of-central-directory signature not found", here is what you can do.įoremost, you want to check that the archive is indeed a zip file, not generated by other similar archive programs such as gzip.
Latter case the central directory and zipfile comment will be found on Either this file is notĪ zipfile, or it constitutes one disk of a multi-part archive. When I try to extract compressed files from the zip file using the unzip command, I am not able to unzip it and instead getting the following error.Įnd-of-central-directory signature not found. Question: I downloaded a zip file from somewhere.
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