How to make sure which program is run behind a terminal command

Question

If I run

ipython notebook

in terminal

it reports

Could not start notebook. Please install ipython-notebook

But I am sure the notebook is indeed install by

conda install ipython-notebook

because

conda install ipython-notebook 

gives me

Fetching package metadata: ..
Solving package specifications: .
# All requested packages already installed.
# packages in environment at /home/a/anaconda:
#
ipython-notebook          2.3.1                    py27_0 

so I guess the command line bunded to a wrong location.

So how can I figure out which binary or directory the command line pointed to?

Answer 1

I am not terribly familar with conda, but looking at the description tells me it is some soft of package management tool. One of its strengths, like the virtualenv package, is that you can have completely different environments (installations) of python packages. This allows you to have a separate set of packages for different requirements, for example.

One drawback is that the different environments need to be activated so that the packages contained therein can be used.

For conda and your particular case, it seems that:

cd ~
source activate anaconda

Will activate the environment stored in $HOME/anaconda/.

Not that conda tells you where the environment is stored:

Fetching package metadata: ..
Solving package specifications: .
# All requested packages already installed.
# packages in environment at /home/a/anaconda:
#
ipython-notebook          2.3.1                    py27_0