JAR, a Java Archive Tool is a command line tool in linux used to combine multiple files into a single JAR archive file.

Format
       Create jar file
          jar c[v0Mmfe] [manifest] [jarfile] [entrypoint] [-C dir] inputfiles [-Joption]

       Update jar file
          jar u[v0Mmfe] [manifest] [jarfile] [entrypoint] [-C dir] inputfiles [-Joption]

       Extract jar file
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