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I download Java to run Minecraft and also other programs that need installation. When I open it, instead of opening it with an installation or something it opens the folders inside of the program with the Archive Manager. I tried to open it with Wine but JAVA for example is .tar.gz.

The other problem I got is that when I install a program from terminal I cannot find it (I've tried searching it) and also I can't use it, for example Unrar.

I am new to this software. I would be very thanks full if you help me.

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I think you have got source will have to build it and then install .search google for how to install java from source – Registered User Feb 28 '14 at 17:20
also what output you are getting while installing a program from terminal. – g_p Feb 28 '14 at 17:44
up vote 3 down vote accepted

When installing new software you should use either the Ubuntu Software Center or sudo apt-get install <applicationNameHere>. If you are downloading tars or zips, you are going to have a harder time finding/running them.

As for Java and Minecraft, run the following command from the Terminal:

java -version

Does it return your current version of Java? Or does it reply with command not found? It should return output similar to this:

$ java -version
java version "1.7.0_45"
Java(TM) SE Runtime Environment (build 1.7.0_45-b18)
Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)

If it returns command not found then you will need to follow the steps listed in this question to install Java: How do I install Java?

Once you have done that and are getting correct output from running a java -version, then you can download Minecraft from here:

Minecraft (for Linux) comes delivered in a Java ARchive or JAR file. You can run this using Java. First, copy Minecraft.jar from your ~/Downloads directory to another location. I created a "minecraft" directory under my home directory for this purpose:

cd ~
mkdir minecraft
cd minecraft
mv ../Downloads/Minecraft.jar .

To run Minecraft, (in the future) just change to that directory and invoke it with Java:

cd ~/minecraft
java -jar Minecraft.jar 

Remember, Ubuntu (Linux) is case-sensitive, so make sure you don't alter the case of any of these commands. You can also do other things like give Minecraft (Java) more memory, or create a clickable desktop icon, but this should be enough to get you started.

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