How to access more than 3 GB of RAM on ubuntu linux without installing 64-bit kernel

I recently upgraded my ThinkPad to 4GB RAM. However to my surprise I learnt that 32-bit OSes can only access 3GB of the RAM. Sad, isn't it? But, here's how to get happy –

Linux is to the rescue, if you are running a recent variant of an Ubuntu system, just install the PAE version of the kernel, reboot your computer, and you're done smiley

  1. First check if your CPU supports PAE, run “cat /proc/cpuinfo | grep pae”, any output is success.
  2. Run this command to install the PAE enabled kernel-

sudo apt-get install linux-image-generic-pae linux-generic-pae linux-headers-generic-pae

Enjoy!

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