failed to install sage 4.7.1 on ubuntu 11.10

[surfer]

i downloaded sage from sagemath.org ( sage-4.7.1-linux-64bit-ubuntu_10.04.1_lts-x86_64-Linux ), unpacked it and tried to do the first run as root. this produced the following error message:

$ sudo ./sage/sage 
----------------------------------------------------------------------
| Sage Version 4.7.1, Release Date: 2011-08-11                       |
| Type notebook() for the GUI, and license() for information.        |
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/opt/sage/local/bin/sage-ipython", line 18, in <module>
    import IPython
  File "/opt/sage/local/lib/python2.6/site-packages/IPython/__init__.py", line 58, in <module>
    __import__(name,glob,loc,[])
  File "/opt/sage/local/lib/python2.6/site-packages/IPython/ipstruct.py", line 22, in <module>
    from IPython.genutils import list2dict2
  File "/opt/sage/local/lib/python2.6/site-packages/IPython/genutils.py", line 59, in <module>
    from IPython.external.path import path
  File "/opt/sage/local/lib/python2.6/site-packages/IPython/external/path.py", line 35, in <module>
    import md5
  File "/opt/sage/local/lib/python/md5.py", line 10, in <module>
    from hashlib import md5
  File "/opt/sage/local/lib/python/hashlib.py", line 136, in <module>
    md5 = __get_builtin_constructor('md5')
  File "/opt/sage/local/lib/python/hashlib.py", line 63, in __get_builtin_constructor
    import _md5
ImportError: No module named _md5

any ideas how this could be fixed?

[grappler]

I can report that an attempt to compile the source code

sage-4.7.1-linux-64bit-ubuntu_10.04.1_lts-x86_64-Linux.tar.lzma

on a new installation of the official release of ubuntu 11.10

gives the same error

ImportError: No module named _md5
make: *** [doc-html] Error 1

[vibration]

I had the same issue. After installation of the package libssl0.9.8 it compiled without error.

[ptg21]

Thanks so much for your post - very much appreciated!

[grappler]

Thanks Vibration - works perfectly!

[MentatGhola]

Aye I had the same error and sure enough installing libssl0.9.8 fixed it.

[ferdiaz]

I had the same issue. After installation of the package libssl0.9.8 it compiled without error.

It worked. Thanks!

[surfer]

the compiled version of sage 4.8 runs (again, with libssl0.9.8 installed) on ubuntu 12.04 as well!

[pietrucha23]

the compiled version of sage 4.8 runs (again, with libssl0.9.8 installed) on ubuntu 12.04 as well!

Sage usually has an official release just for LTS Ubuntu. And 12.04 will be one. So hopefully in May 2012 we will have Sage working out the box on 12.04.