1-1 Go to http://download.dokuwiki.org/

1-2 Check: Download changed files only

1-3 Toggle Languages and Select fa.

1-4 find download link and put it in right place.

2-1 Unpack and overwrite:

tar -xzvf dokuwiki-YYYY-MM-DD.tgz --strip-components=1

2-2 Remove unused files:

grep -Ev '^($|#)' data/deleted.files | xargs -n 1 rm -vf