How to archive all the DONE tasks using a single command

Question

To archive the DONE tasks i am using

C-c C-x a

command. The draw back is i have to manually move over the DONE tasks one by one and then ar

Answer 1

Also from http://orgmode.org/manual/Moving-subtrees.html#Moving-subtrees

C-u C-c C-x C-s

Check if any direct children of the current headline could be moved to the archive. To do this, each subtree is checked for open TODO entries. If none are found, the command offers to move it to the archive location. If the cursor is not on a headline when this command is invoked, the level 1 trees will be checked.