Added a useful option (#32116)

guide/english/bash/bash-mv/index.md

@@ -16,6 +16,7 @@ mv <source> <path + filename>
 The first argument is the file you want to move, and the second is the location to move it to. It can also be used to rename a file, by inputting 2 file names as parameters, like so: `mv originalFilename.txt newFilename.txt`
 
 Commonly used options:
+- `-b` to create a backup file with the name of the destination file
 - `-f` to force move them and overwrite files without checking with the user.
 - `-i` to prompt confirmation before overwriting files.
 - `-n` do not overwrite an existing file