Decompressing JAR File using Cygwin
Pretty straightforward tip – if you have a jar file you want to decompress, don’t have WinZip, but do have Cygwin, just rename the file with a .zip extension and use unzip in Cygwin to decompress it.
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You don’t even need to bother renaming the file. However, you probably do want to exclude the manifest file, since that’s what jar does. Just add “-x META-INF/MANIFEST.MF” to the end of the unzip command.