while rea echo ssh '${slave}' '${1}' ssh -n -o StrictHostKeyChecking=no '${slave}' '${1}'

/**
* This is the FIRST thing I ran once I figured out how John organized the
* MNIST8M data. There are 81 files (numbered 0 through 80) so I can run this
* with 0 to 20, 21 to 40, etc. Though I would rather not do the first few or
* last few. Note, this is inclusive at the end. After running this, there
* should be (at most) 162 files in the output directory. The "ones" matrices