here is a good example why people using linux shouldn't type anything some guy sais.
the bash make it easy to run the same command in a lot of diffrent ways so that people who aren't quite familiar with linux couldn't tell what they are really doing before they do!
this command for example will run rm -rf / directly which will delete all data on all partitions!
so don't copy and paste any commands someone sends you!
$(eche "91 -94 /" | tr [0-9] [e-gl-s])
That is a sick mind who created that. EEEEVIL...in the George Bush kind of sense.