I have a small copy n paste txt file for when my hard drive fails (hopefully in the distant future) so I can get my new hard drive up and running again as closely similar to the previous drive as possible.
I made the one command up myself and just discovered it does not work. That command is:
  
  # Reduce the swap tendency 
  cat >> /proc/sys/vm/swappiness <<eof
  > vm.swappiness=10
  eof

with the error of:

   cat: write error: Invalid argument

I have a similar 

  sudo cat >> /etc/fstab << eof
  /media/bmike1/entertainment/Pictures /home/bmike1/Pictures none bind 0 0 
  eof

which I do not believe was implemented  correctly as when I inspect 'mount' there does not appear to be the entertainment directory or pictures directories listed anywhere. So I suppose it is wrong then....


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:-)~MIKE~(-: