I guess you need to be sharper and also more careful about the syntax. Anyways, just to write to a floppy see the contents of /etc/fstab (use kwrite/gedit...) as to where the floppy is mounted. Most probably its mounted at /media/floppy0 like me.
So you can just do a $ mount /media/floppy0 and henceforth write there.
Simple text-editor:VIM. Read man pages. ($ man vim). Popular controls- "i" for edit(insert) and <esc> to stop inserting,"x" for erase char, ":" for save,quit,line-no. etc. e.g.,":wq" for write and quit,":q" for just quit, ":q!" forced quit,":6111" to go to line no.6111 etc.