Disable extra ttys on Ubuntu

By default 6 consoles (ttys) are spawned at boot in Linux systems. All of them are not needed at any point of time. To save memory reduce the number of ttys. I keep only one tty enabled. On Ubuntu 12.04 (Precise Pangolin) to 13.04 (Raring Ringtail) do the following:

# sudo mv /etc/init/tty2.conf{,.bak}

Do the same for tty3 to tty6.
Oh yes! As Ubuntu 12.04 has disabled GUI root login (at least in Beta) I am learning to use sudo. :'(

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