tar cvf $(date +%N).tar foo.txt
foo.txt


########

bash -x ~/.scripts/prepare foo.txt
++ date +%N
+ now=949106654
+ echo -e '\e[1;32m  Balling it up.... \e[0m'
  Balling it up....
+ tar cvf 949106654.tar foo.txt ''
foo.txt
tar: Substituting `.' for empty member name
tar: : Cannot stat: No such file or directory
tar: Exiting with failure status due to previous errors