Install Oracle Java Runtime (JRE) 7 in Ubuntu 12.04 (Precise Pangolin)

Ubuntu 12.04 (Precise Pangolin) is right around the corner and requests have been pouring in from our loyal readers. One of those requests is how to install Oracle Java Runtime Environment (JRE) 7 in Ubuntu 12.04. I have written about this topic on this blog previously, but not for Precise Pangolin. This brief tutorial is going to show you how to install it in Ubuntu 12.04 Precise Pangolin if you haven’t already done so.

Objectives:

• Install Oracle Java / JRE in Ubuntu 12.04 (Precise Pangolin)
• Enjoy!

To get started, press Ctrl – Alt – T on your keyboard to open Terminal. When it opens, run the commands below to remove all other installations of OpenJDK from your system.

sudo apt-get purge openjdk*

After that, go and download Java JRE package from here.  When prompted, save the download. Please select the 32 or 64 bit .tar.gz version file from the list.



After saving the file, go back to your terminal and run the below commands to extract the java packages you downloaded.

tar -xvf ~/Downloads/jre-7u3-linux-i586.tar.gz

Next, create your java 7 folder by running the commands below.

sudo mkdir -p /usr/lib/jvm/jre1.7.0

Then move all the extracted files and folders into the java 7 folder.

sudo mv jre1.7.0_03/* /usr/lib/jvm/jre1.7.0/

Next, run the commands below to install / update java 7

sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jre1.7.0/bin/java 0

Next, create a plugin folder in your home directory by running the commands below.

mkdir ~/.mozilla/plugins 

Finally, link the java plugin to your profile.

ln -s /usr/lib/jvm/jre1.7.0/lib/i386/libnpjp2.so ~/.mozilla/plugins/

That’s it! Enjoy!



If your system profile is AMD64, then link java to your profile by running the commands below.

ln -s /usr/lib/jvm/jre1.7.0/lib/amd64/libnpjp2.so ~/.mozilla/plugins/

How to add extra local storage in Proxmox VE

Purpose:

Adding more local hard drives to Proxmox for storage purposes.





Used Software:

Proxmox VE 3.1

Necessary:

Extra added hard drives without partitions.

Installation:

SDA is the drive where the proxmox installation is running
SDB is the new drive that will be added to the proxmox.


Open the Proxmox Shell

With fdisk you can find your drives that you want to add, if you are not sure what the device name is for your hard drive that you want to add. 

    Type: fdisk -l

Find the "Disk" with no valid partition table. That will be probably your hard drive you want to add.

"Disk /dev/sdb doesn't contain a valid partition table"

To make a partion on the new drive type the following:

 Type: cfdisk /dev/sdb

Choose the following options:

New  -->  Primary  -->  Specify size in MB
Write
Quit

Now a physical volume has to be created.

Type: pvcreate /dev/sdb1

Create a volume group. The name "Data-Storage" is an example. You can name it anyway you want. Consider a logical name, because this is the name that will be used in the proxmox web interface:

Type: vgcreate Data-Storage /dev/sdb1

Add the storage in ProxMox

-       In the webinterface click on the directory Datacenter and then click on tab Storage.

-       Click Add – LVM Group

o    Type an ID Name for example data-storage

o    Base Storage: Existing Volume Groups

o    Volume Group: Data-Storage

o    Enabled: Checked
o    Other options should be adjusted accordenly to what you want with it. 

Now the extra storage has been added in Proxmox and ready for use.