graphcap additions together at the head of
the file, so that they may merely be transferred to the new file with the
editor. Note that when updating existing SunOS/IRAF and Solaris/IRAF
systems to a common V2.11 Sun/IRAF system the dev$tapecap files
are different for the two architectures, you will need to merge the saved
files separately to the tapecap.sunos and
tapecap.solaris
files. See the Site Manager's Guide for more information on this.
The task of propagating revisions will also be much easier if
detailed notes have been kept of all revisions made since the the last
release was installed.
Beginning with IRAF version 2.8, one should no longer install locally added software in the core system LOCAL package. This significantly complicates updates and is no longer necessary as, due to the layered software enhancements introduced in V2.8 IRAF, it is now straightforward for each site to maintain their own custom LOCAL package external to the core IRAF system. The core system LOCAL is now only a template-local to be copied and used as the starting point for a custom LOCAL layered package. The layered software enhancements, and the procedure for building a custom LOCAL, are discussed further in the Sun/IRAF Site Manager's Guide.
*The UNIX utility diff is useful for comparing files to see what has changed.