[dotancohen]

My choice has always been `shred`:

  $ sudo truncate --size 1G /emergency-space
  $ sudo shred /emergency-space

I find it widely available, even in tiny distros.

[ape4]

Very cool. Reading the man page I see, by default, shred does 3 iterations. Adding --iterations=1 makes it random enough for this purpose and faster.

[dotancohen]

Terrific, thank you!