# File lib/kreadwriteconfig.rb, line 78
    def write(group,key,value)
        if not File.exist?(@rfile)
            File.new(@rfile, "w+")
        end
        if not File.writable?(@rfile)
            raise "#{@rfile} not writable."
        end
        @cmd = "kwriteconfig "
        worker(group,key,value)
    end