You can move a file into a different directory, by using the mv command.
Enter:
mv myFile secondFile
myFile is the path and name of the first file, secondFile is the path and directory of the next file.
If you specify mv to move a file to a location and a file of the same name already exists there, mv deletes the existing file and overwrites it with the new file.
You can also use the mv command to rename a file. Renaming is just moving the contents of a file into a new file with a different name and then deleting the original file.
For more information on moving files, see the mv man page by entering man mv in the Terminal window.