You can use the xlf_install utility to update XL Fortran V10.1 when all the following conditions have been met:
http://www.ibm.com/software/awdtools/fortran/xlfortran/
# cd /home/root/update/xlf/mmmYYYY
where mmmYYYY is the month and year of the PTF
shipment date. (For example, jun2005 indicates a shipment date
in June of 2005.) # ./xlf_install -U
IBM XL Fortran Advanced Edition for Linux has been successfully installed. To learn about setting up your environment with XL Fortran, refer to the XL Fortran Advanced Edition V10.1 for Linux Installation Guide.This message indicates that the following has taken place: