The DATA step is used to describe and modify your data. In it you tell SAS how to read data, create variables, delete observations, change variable values, and limit analysis to relevant data. SAS datasets are the common element between DATA steps and PROC steps. All of SAS's many PROC steps begin with a line containing the PROC statement. That may be followed by one or more lines further refining the procedure.
Some procedures allow certain options to be specified as well.
Running SAS SAS on UNIX runs in much the same way as SAS on other computing platforms. A second file will be created if the SAS job runs successfully. If the program did not run successfully, only the log file is created. In this case it contains diagnostic information that will help you correct the errors that prevented the SAS job from totally successful completion. In that directory you will find the config.sas612 file.