Question

Using a single command with wild cards, move song.mp3, song.wav, letter01.txt and letter02.txt to deleted folder. Do not overwrite files at the destination.

Answer 1

The command to move the files to the deleted folder without overwriting any files at the destination would be:

```
mv -n song.{mp3,wav} letter{01,02}.txt /path/to/deleted/folder/
```

This command uses curly braces to specify multiple file extensions and numbers in the file names. The `-n` option prevents overwriting any files at the destination with the same name.