diff -r -U2 maxima-5.41.0.orig/interfaces/emacs/misc/bookmode.el maxima-5.41.0/interfaces/emacs/misc/bookmode.el
--- maxima-5.41.0.orig/interfaces/emacs/misc/bookmode.el	2017-05-29 05:30:43.000000000 +0700
+++ maxima-5.41.0/interfaces/emacs/misc/bookmode.el	2018-09-05 20:53:02.518172515 +0700
@@ -681,5 +681,5 @@
 		  (and tem
 		       (list (concat "View "(nth 1 tem))
-			     'call-process  "ghostview" nil nil nil
+			     'call-process  "xdg-open" nil nil nil
 			     (expand-file-name(nth 1 tem))
 			     ))
@@ -706,5 +706,5 @@
 			  (cond ((looking-at "%PS") "")
 				(t "gzip -dc | "))
-			  "ghostview -")
+			  "xdg-open -")
 			 
 	)))
diff -r -U2 maxima-5.41.0.orig/interfaces/xmaxima/Tkmaxima/Constants.tcl maxima-5.41.0/interfaces/xmaxima/Tkmaxima/Constants.tcl
--- maxima-5.41.0.orig/interfaces/xmaxima/Tkmaxima/Constants.tcl	2016-04-03 03:42:45.000000000 +0600
+++ maxima-5.41.0/interfaces/xmaxima/Tkmaxima/Constants.tcl	2018-09-05 20:55:25.180166516 +0700
@@ -154,7 +154,7 @@
     image/png  netmath
     image/jpeg netmath
-    application/postscript "ghostview -safer %s"
-    application/pdf "acroread %s"
-    application/x-dvi "xdvi %s"
+    application/postscript "xdg-open %s"
+    application/pdf "xdg-open %s"
+    application/x-dvi "xdg-open %s"
 }
 set maxima_priv(imagecounter) 0