(rrdplot.pl) #!/usr/bin/env perl open(GP,"|gnuplot -persist") or die "no gnuplot"; print GP "set term dumb\n"; print GP "set xdata time\n"; print GP "set timefmt \"%Y/%m/%d %H:%M:%S\"\n"; print GP "plot \"-\" using 1:3, \"-\" using 1:4\n";…