SAS provides limited support for hard links and symbolic links in UNIX environments. You can create links that point to a SAS data set or SAS catalog. If you reference the link in a SAS program, SAS will follow the link to find the data set or catalog.
For example, you can create a symbolic link in the /tmp directory to the /home/ user /mydata.sas7bdat data set by typing the following command at the UNIX prompt:
ln -s /home/user/mydata.sas7bdat /tmp/mydata.sas7bdat
The following SAS code uses the symbolic link in the /tmp directory to find the mydata.sas7bdat data set. This code does not change the symbolic link, but it does sort the data in the data set.
libname tmp '/tmp'; proc sort data=tmp.mydata; by myvariable; run;
If you are running in the SAS windowing environment, you can use the Explorer window to view the symbolic links that are stored within a specific directory. Any symbolic link that points to a nonexistent SAS file will have a file size of 0.0KB and a modified date of 31DEC59:19:00:00 .
SAS does not support links for a data set that has any of the following: