install emacs25

got error auctex is unavailable. I tried to install it and added the load-path to init file but it doesnt workkkk

init.el

@@ -8,6 +8,7 @@
 ;(add-to-list 'load-path "~/.emacs.d/auto-complete-clang/")
 ;(dd-to-list 'load-path "~/.emacs.d/lisp/benchmark-init-el")
 ;(add-to-list 'load-path "/usr/local/share/emacs/site-lisp/doxymacs")
+;(add-to-list 'load-path "~/.emacs.d/site-lisp/auctex")
 ;(require 'benchmark-init-loaddefs)
 ;(benchmark-init/activate)
 

init.sh

 #!/bin/bash
 
-# install emacs
+# install emacs25
+sudo add-apt-repository ppa:kelleyk/emacs
 sudo apt-get update
-sudo apt-get install -y emacs
+sudo apt-get install emacs25
 sudo apt-get clean
 
 # directory for orgfiles
@@ -19,3 +20,4 @@ touch $orgfileDir/meeting.org
 
 # download config file
 git clone https://gitlab.version.fz-juelich.de/chraibi1/san_emacs.git $HOME/.emacs.d
+