| Command | Effect | Why can it happen? |
| mv ~/*>jpg lib/pictures | all dirs from home directory (except current directory) are moved. After a "cd",
you will no more find any files. | . and > are are the same key on the keyboard |
| rm * .pnm | all files in the current directory are deleted | touch the space bar with an other finger |
| cp -r ~/Documents/presentation.key/ . | Moves all individual files from keynote presentation into current directory instead of directory (OS X).
Hundreds of files litter the current place. | tab completion adds backslash. This is a OS X thing. In linux, the directory would be copied. |