Cacti

and how do i do that?
thanks

ERROR: opening '/var/www/html/cacti/rra/localhost_mem_buffers_3.rrd': No such file or directory

what is STDERR ?

/usr/bin/rrdtool graph - \ --imgformat=PNG \ --start=-86400 \ --end=-300 \ --title="Localhost - Memory Usage" \ --rigid \ --base=1000 \ --height=120 \ --width=500 \ --alt-autoscale-max \ --lower-limit=0 \ --vertical-label="kilobytes" \ DEF:a="/var/www/html/cacti/rra/localhos...