fil

 sage
┌────────────────────────────────────────────────────────────────────┐
│ SageMath version 7.2, Release Date: 2016-05-15                     │
│ Type "notebook()" for the browser-based notebook interface.        │
│ Type "help()" for help.                                            │
└────────────────────────────────────────────────────────────────────┘
Traceback (most recent call last):
  File "/usr/lib/sagemath/src/bin/sage-ipython", line 13, in <module>
    app.initialize()
  File "<decorator-gen-111>", line 2, in initialize
  File "/usr/lib/sagemath/local/lib/python2.7/site-packages/traitlets/config/application.py", line 74, in catch_config_error
    return method(app, *args, **kwargs)
  File "/usr/lib/sagemath/local/lib/python2.7/site-packages/IPython/terminal/ipapp.py", line 297, in initialize
    super(TerminalIPythonApp, self).initialize(argv)
  File "<decorator-gen-7>", line 2, in initialize
  File "/usr/lib/sagemath/local/lib/python2.7/site-packages/traitlets/config/application.py", line 74, in catch_config_error
    return method(app, *args, **kwargs)
  File "/usr/lib/sagemath/local/lib/python2.7/site-packages/IPython/core/application.py", line 407, in initialize
    self.init_profile_dir()
  File "/usr/lib/sagemath/local/lib/python2.7/site-packages/IPython/core/application.py", line 314, in init_profile_dir
    p = ProfileDir.find_profile_dir_by_name(self.ipython_dir, self.profile, self.config)
  File "/usr/lib/sagemath/local/lib/python2.7/site-packages/traitlets/traitlets.py", line 529, in __get__
    return self.get(obj, cls)
  File "/usr/lib/sagemath/local/lib/python2.7/site-packages/traitlets/traitlets.py", line 508, in get
    value = self._validate(obj, dynamic_default())
  File "/usr/lib/sagemath/local/lib/python2.7/site-packages/IPython/core/application.py", line 146, in _ipython_dir_default
    self._ipython_dir_changed('ipython_dir', d, d)
  File "/usr/lib/sagemath/local/lib/python2.7/site-packages/IPython/core/application.py", line 244, in _ipython_dir_changed
    ensure_dir_exists(new)
  File "/usr/lib/sagemath/local/lib/python2.7/site-packages/IPython/utils/path.py", line 442, in ensure_dir_exists
    os.makedirs(path, mode=mode)
  File "/usr/lib/sagemath/local/lib/python/os.py", line 157, in makedirs
    mkdir(name, mode)
OSError: [Errno 28] No space left on device: '/home/a/.sage/ipython-4.1.2'

If you suspect this is an IPython bug, please report it at:
    https://github.com/ipython/ipython/issues
or send an email to the mailing list at ipython-dev@scipy.org

You can print a more detailed traceback right now with "%tb", or use "%debug"
to interactively debug it.

Extra-detailed tracebacks for bug-reporting purposes can be enabled via:
    c.Application.verbose_crash=True