[AaronBBrown]

I use this one like a dozen times a day.

  user@host$ less /var/log/syslog
  Permission Denied

crap...

  $ sudo !!
  sudo less /var/log/syslog

Woo!

[sudara]

This is exactly how I use it. A time saver for mundane "whups" moments.

[biturd]

why would that be bad? You would get to read your file.

[AaronBBrown]

It's not bad. It's extremely useful. If someone is so negligent that they run something potentially destructive and then immediately sudo !!, they probably shouldn't be administering systems.