Add the following line to the bottom of your /etc/fstab file (you'll need sudo to do this): 
tmpfs /var/memdir tmpfs nodev,nosuid,size=1M 0 0

[download]

This is a very interesting approach!
Can you explain why you chose /var/memdir and not /tmp/memdir as it by its very nature temporary.

Also, any reason to set the number of blocks to zero?

Does the /etc/fstab contain all the information about the entire file systems?

In reply to Re^2: Preventing multiple instances by Bod
in thread Preventing multiple instances by Bod

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