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Never to forget - UNIX/JAVA commands


Creating executable JAR file without using Fat-Jar plug-in.
1.     Creating an executable JAR from a Java code & how to execute it:
o    You need to create MANIFEST.MF file at the root level with the following structure.

Manifest-Version: 1.0
Main-Class: EncryptionTest
Class-Path: bcprov-jdk16-145.jar
o    where, "EncryptionTest" is main class and "bcprov-jdk16-145.jar" is external jar used in code.
o    Create JAR using:
jar -cvfm javaTest.jar MANIFEST.MF *.*

To run do: java -jar javaTest.jar
2.     Compressing and unzipping files in UNIX / LINUX machines.
1.     Creating an archive and compressed/gzipped archive using option “CVZF”
To use a gzip compression on the tar archive, use the z option as shown below.

$ tar cvzf archive_name.tar.gz dirname/

In the above command:
• c – create a new archive
• v – verbosely list files which are processed.
• f – following is the archive file name
• z – filter the archive through gzip
Note: .tgz is same as .tar.gz

2.     Extract the gzipped tar file
Use the option z for uncompressing a gzip tar archive.
$ tar xvfz archive_name.tar.gz

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