Thread: Reading CSS format in SAC

Hello,

I am amateur in SAC. In order to understand how to use READCSS I read the manual in http://seismolab.gso.uri.edu/~savage/sac/commands/readcss.html, however I cannot figure out much about it. There is a folder for some recorded events in CSS format. This folder consist of different files that really make me confused. Would you please help me to make this problem more tangible.
I find the command as follows:
sac2000             ### starts sac2000
readcss file.wfdisc ### read the wfdisc and load corresponding file.w
plot                ### plot the waveform
listhdrw

how I can define the directory contains the signal to this command?
Is there an other program for reading this format?