Following the ppa sage link, I tried to install sage-7, it works fine. Time 
for patching, but no problem.
I use two version of sagemath the ppa and developer one (which I compile) 
and after I compile sagemanifolds (which I can't do at the moment with the 
ppa because it's installed system-wide).
Thanks for this good work
Henri 

Le mardi 2 février 2016 18:16:12 UTC+1, slelievre a écrit :
>
> Dear sage-support (cc: sage-release, sage-devel) 
> (please reply on sage-support only) 
>
> I received the following question after announcing 
> Sage 7.0 on sage-announce. 
>
> This is one of many such questions I am reading on 
> various lists and sites recently. 
>
> Something needs to be more clearly documented, 
> or refactored. 
>
> Can someone answer this question by replying to 
> this post on sage-support? 
>
> Thanks! 
> Samuel 
>
> ---------- Forwarded message ---------- 
> Date: Mon, 1 Feb 2016 23:32:31 -0600 
> To: Samuel Lelievre <samuel....@gmail.com <javascript:>> 
> Subject: Installing upgraded SageMath 
>
> I tried installing sagemath-upstream-binary on my Ubuntu Trusty Tahr 
> system and saw this: 
>
> Rewriting paths for your new installation directory 
> =================================================== 
>
> This might take a few minutes but only has to be done once. 
>
> patching 
> /usr/lib/sagemath/src/build/cythonized/sage/structure/list_clone.c 
> Traceback (most recent call last): 
>   File "/usr/lib/sagemath/relocate-once.py", line 85, in <module> 
>     
> p('src/build/cythonized/sage/structure/list_clone.c').substitute().save() 
>   File "/usr/lib/sagemath/relocate-once.py", line 70, in __call__ 
>     return FilePatch(self, filename) 
>   File "/usr/lib/sagemath/relocate-once.py", line 21, in __init__ 
>     self.st = os.stat(filename) 
> OSError: [Errno 2] No such file or directory: 
> '/usr/lib/sagemath/src/build/cythonized/sage/structure/list_clone.c' 
>
> Any idea what is up? 
>
> Dale Amon 
>

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