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 +====== Install JRE (32-bit) ======
  
 +Note: the terminal commands in this how-to possibly refer to an older version of JRE. When there'​s a newer version, you can simply adapt the file names in the terminal commands.
 +
 +This how-to has been written for JRE 6 update 18 (32 bit version).
 +
 +
 +1. Go to the folder opt, with the following command:
 +
 +Applications - Accessories - Terminal
 +
 +Type (use copy/paste: rapidly click three times on the blue line, in order to select the entire line).
 +<​code>​
 +cd /opt
 +</​code>​
 +Press Enter.
 +
 +
 +2. Create a new subfolder, with the following command line. 
 +Type (copy/​paste):​
 +<​code>​
 +sudo mkdir java
 +</​code>​
 +Press Enter.
 +
 +Type your password. You won't see anything, not even dots, this is normal.
 +Press Enter.
 +
 +
 +3. Go to the new folder, with the following command.
 +Type (copy/​paste):​
 +<​code>​
 +cd java
 +</​code>​
 +Press Enter.
 +
 +
 +4. Create a new subfolder, with the following command.
 +Type (copy/​paste):​
 +<​code>​
 +sudo mkdir 32
 +</​code>​
 +Press Enter.
 +
 +
 +5. Move the JRE file that you just downloaded, into this newest folder, with the following command.
 +Type (copy/​paste):​
 +<​code>​
 +sudo mv ~/​jre-6u18-linux-i586.bin /​opt/​java/​32
 +</​code>​
 +Press Enter.
 +
 +
 +6. Make the file executable, with the following command.
 +Type (copy/​paste):​
 +<​code>​
 +sudo chmod 755 /​opt/​java/​32/​jre-6u18-linux-i586.bin
 +</​code>​
 +Press Enter.
 +
 +Now you're going to install JRE, by executing this file.
 +
 +
 +7. First, go to the new folder, with the following command.
 +Type (copy/​paste):​
 +<​code>​
 +cd /​opt/​java/​32
 +</​code>​
 +Press Enter.
 +
 +
 +8. Execute the file, with the following command.
 +Type (copy/​paste):​
 +<​code>​
 +sudo ./​jre-6u18-linux-i586.bin
 +</​code>​
 +Press Enter.
 +
 +Now the license agreement appears. ​
 +Press as many times on the space bar, until you see the following text (or hit '​q'​):​
 +Do you agree to the above license terms? [yes or no]
 +
 +Type:
 +<​code>​
 +yes
 +</​code>​
 +Press Enter.
 +
 +
 +Inform the system and make the new JRE the default
 +
 +9. Now you'll want to tell the system, that there'​s a new Java version available.
 +
 +Type (copy/​paste):​
 +<​code>​
 +sudo update-alternatives --install "/​usr/​bin/​java"​ "​java"​ "/​opt/​java/​32/​jre1.6.0_18/​bin/​java"​ 1
 +</​code>​
 +Press Enter.
 +
 +Note: are you updating from a previous Java version, which you have removed manually? Then you'll need to execute the above command twice, because you'll get an error message the first time.
 +
 +
 +10. Tell the system, that the new Java must be the default:
 +
 +Type (copy/​paste):​
 +<​code>​
 +sudo update-alternatives --set java /​opt/​java/​32/​jre1.6.0_18/​bin/​java
 +</​code>​
 +Press Enter.
 +
 +
 +Install the Firefox plugin
 +
 +11. Installing the Firefox plugin is simple. First execute the following command, in order to create a certain folder (if it doesn'​t exist already).
 +
 +Type in the terminal (copy/​paste):​
 +<​code>​
 +mkdir ~/​.mozilla/​plugins
 +</​code>​
 +Press Enter.
 +
 +If it exists already, you'll see a notification of that.
 +
 +
 +12. Now remove the IcedTea plugin, if it has been installed.
 +
 +Type (copy/​paste):​
 +<​code>​
 +sudo apt-get remove icedtea6-plugin
 +</​code>​
 +Press Enter.
 +
 +
 +13. Remove a former version of the Java plugin.
 +
 +Type (copy/​paste):​
 +<​code>​
 +rm ~/​.mozilla/​plugins/​libjavaplugin_oji.so
 +</​code>​
 +Press Enter.
 +
 +And then type (copy/​paste):​
 +<​code>​
 +rm ~/​.mozilla/​plugins/​libnpjp2.so
 +</​code>​
 +Press Enter.
 +
 +
 +14. Now you can install the plugin, by creating a symbolic link (you tell Firefox, where the plugin is located).
 +
 +For Firefox 3.5 and older, type (copy/​paste):​
 +<​code>​
 +ln -s /​opt/​java/​32/​jre1.6.0_18/​plugin/​i386/​ns7/​libjavaplugin_oji.so ~/​.mozilla/​plugins/​
 +</​code>​
 +For Firefox 3.6 and newer, type (copy/​paste):​
 +<​code>​
 +ln -s /​opt/​java/​32/​jre1.6.0_18/​lib/​i386/​libnpjp2.so ~/​.mozilla/​plugins/​
 +</​code>​
 +Press Enter.
 +
 +
 +Final check
 +
 +Now close and restart Firefox. Check if everything has succeeded. Type in the url bar of Firefox (not in the terminal!):
 +
 +<​code>​
 +about:​plugins
 +</​code>​
 +Press Enter.
 +
 +And scroll down, until you see something approximately similar to this:
 +Java(TM) Plug-in 1.6.0_18
 +
 +You can also use this website:
 +http://​java.com/​en/​download/​installed.jsp
 +
 +====== Sun Java 6 Plugin Control Panel ======
 +
 +
 +You can call up the Control Panel as follows (in each user account):
 +
 +Type (copy/​paste):​
 +<​code>​
 +/​opt/​java/​32/​jre1.6.0_18/​bin/​ControlPanel
 +</​code>​
 +Press Enter.
 +
 +====== Update Lucid Lynx ======
 +It looks like Sun Java is put into the partner repository. You can now regain it simply by enabling that repository and updating. Search for "​sun-java"​ and there you have it!
 +
 +----
 +
 +----
 +Source: http://​sites.google.com/​site/​easylinuxtipsproject/​java
howtos/manual_install_sun_java.txt · Last modified: d/m/Y H:i (external edit)