On the citation2.atmos.und.edu network, open a Linux terminal and navigate to directory where data is stored

Type cplot2 file_name with file_name being the file you want plotted
  * *.serialc.dmtccnc.raw contains CCN concentrations

Click "Time [second]" in the X-Axis column and "dccnConc [#/cm^3]" in the Y-Axis column

Go to Plot > XY Graph to plot data