The first step is for the superuser to create an account for the fictitious user `iraf', with home directory /iraf/iraf/local and shell /bin/csh. The /u3/iraf directory is created owned by IRAF, and pointed to by the link /iraf. We then login as IRAF (a warning message will be printed since there is no login directory) and proceed as follows.

% whoami
iraf
%
% setenv iraf /iraf/iraf/               # set root directory
% mkdir /iraf/iraf
%
% cd $iraf                              # unpack main IRAF distribution
% cat /scr0/as.aix3.gen/as.* | uncompress | tar -xpf -
%
% cd /iraf                              # create BIN directories
% mkdir irafbin
% mkdir irafbin/bin.rs6000
% mkdir irafbin/noao.bin.rs6000
%
% cd $iraf/bin.rs6000                   # unpack core bin.rs6000
% cat /scr0/ib.aix3.rs6/ib.* | uncompress | tar -xpf -
%
% cd $iraf/noao/bin.rs6000              # unpack NOAO bin.rs6000
% cat /scr0/nb.aix3.rs6/nb.* | uncompress | tar -xpf -
%
% cd $iraf/unix/hlib                    # run the INSTALL script
% source irafuser.csh
% ./install -n
% su
# ./install
# exit
%
% cd
% source .login                         # read new .login
% rehash                                # pick up new iraf commands
% cl                                    # verify that the CL runs