apiemont

As modified to compile it under Ubuntu 14.04 (LTS) and Ubuntu 16.04 (LTS)

$ cat Makefile
F77 = gfortran
FFLAGS = -c -O2 -mcmodel=medium -fd-lines-as-comments
LFLAGS = -O2 -Wall -Wsurprising -defsym,mem_=0 -fbounds-check
HOSTLIBS = -lm 
IMFORT = $(HOME)/opt/iraf-2.16.1-gfortran-linux64/unix/bin.linux64/libf2c.a $(HOME)/opt/iraf-2.16.1-gfortran-linux64/bin.linux64/libimfort.a $(HOME)/opt/iraf-2.16.1-gfortran-linux64/bin.linux64/libsys.a $(HOME)/opt/iraf-2.16.1-gfortran-linux64/bin.linux64/libvops.a $(HOME)/opt/iraf-2.16.1-gfortran-linux64/unix/bin.linux64/libos.a
FITLIB = -lcfitsio

apiemont

# tmux starts a session with defult name of 0 (zero)
# list sessions with 'tmux ls'
# attach to a session with 'tmux attach' (ok if there is only one) or 'tmux attach 0'
# to detach issue CTRL-a-d
# to move to right/top/left split use CTRL-a then righ/top/left-arrow etc etc ... 
# to resize a pane use CTRL-a-arrowkey
#
# my customizations below
#

apiemont

==========================================          ==========================================
             TMUX COMMAND                                        WINDOW (TAB)
==========================================          ==========================================

List    tmux ls                                     List         ^b w
New          -s <session>                           Create       ^b c
Attach       att -t <session>                       Rename       ^b , <name>
Rename       rename-session -t <old> <new>          Last         ^b l               (lower-L)
Kill         kill-session -t <session>              Close        ^b &