I have created this file using 7za command called test.war# file test.wartest.war: 7-zip archive data, version 0.4I am trying to extract this file in another RHEL machine using command :# unzip test.warArchive:  test.war  End-of-central-directory signature not found.  Either this file is not  a zipfile, or it constitutes one disk of a multi-part archive.  In the  latter case the central directory and zipfile comment will be found on  the last disk(s) of this archive.unzip:  cannot find zipfile directory in one of test.war or        test.war.zip, and cannot find test.war.ZIP, period.Does this mean I cannot unzip the file that has been created using 7zip? 
File zipped using 7za cannot be unzipped using zip utility
rhel;zip;7z
In this particular case, no, you can't extract the file using unzip; you need to use 7za to extract it.By default, 7za creates 7z-format archives. It can also create zip-format archives, which can be extracted using unzip; to do so, either specify an archive with a .zip extension, or specify the type using -tzip:7za a -tzip test.war ...This will produce a test.war file which can be extracted with unzip.Note that if you're creating a JavaEE WAR file you should use the jar tool anyway (or the appropriate plugin for your build tool), not zip or 7za.