This is SageMathCell - a Sage computation web service.
Our mailing list is https://groups.google.com/forum/#!forum/sage-cell
If you are going to run a world accessible SageMathCell server, you must understand security implications and should be able to implement reasonable precautions.
The worker account (which is your own one by default) will be able to execute arbitrary code, which may be malicious. Make sure that you are securing the account properly. Working with a professional IT person is a very good idea here. Since the untrusted accounts can be on any computer, one way to isolate these accounts is to host them in a virtual machine that can be reset if the machine is compromised.
We assume that you have access to the Internet and can install any needed dependencies. If you need to know more precisely what tools are needed, please consult the scripts for building virtual machine images in contib/vm. In particular, system packages installed in the base container are listed here.
Install required npm packages:
sudo apt-get install npm # On Debian based systems we need to make an alias sudo ln -s /usr/bin/nodejs /usr/bin/node sudo npm install -g requirejs
Optionally create a directory for all components:
mkdir sc_build cd sc_build
Get and build Sage (
export MAKE="make -j8"or something similar can speed things up):
git clone https://github.com/novoselt/sage.git pushd sage git checkout sagecell make popd
Note that we are building a special branch of Sage, do NOT use your regular Sage installation!
Prepare Sage for SageMathCell:
sage/sage -pip install --upgrade lockfile sage/sage -pip install --upgrade paramiko sage/sage -pip install --upgrade sockjs-tornado
Note that version 1.0.3 of
sockjs-tornadohas a CORS issue fixed by https://github.com/mrjoes/sockjs-tornado/pull/83 You may delete these lines manually from
git clone https://github.com/sagemath/sagecell.git pushd sagecell git submodule update --init --recursive ../sage/sage -sh -c make
Go into the
sagecelldirectory (you are there in the end of the above instructions).
config.py. (Or fill
config.pyonly with entries that you wish to change from default values.)
config.pyaccording to your needs. Of particular interest are
usernameentries of the
_default_configdictionary: you should be able to SSH to
username@hostwithout typing in a password. For example, by default, it assumes you can do
ssh localhostwithout typing in a password. Unless you are running a private and firewalled server for youself, you’ll want to change this to a more restrictive account; otherwise anyone will be able to execute any code under your username. You can set up a passwordless account using SSH: type “ssh passwordless login” into Google to find lots of guides for doing this, like http://www.debian-administration.org/articles/152. You may also wish to adjust
db_config["uri"](make the database files readable only by the trusted account).
You may want to adjust
log.pyto suit your needs and/or adjust system configuration. By default logging is done via syslog which handles multiple processes better than plain files.
Start the server via
../sage/sage web_server.py [-p <PORT_NUMBER>]
where the default
8888and go to
http://localhost:<PORT_NUMBER>to use the Sage Cell server.
When you want to shut down the server, press
Ctrl-Cin the same terminal.
See the LICENSE.txt file for terms and conditions for usage and a DISCLAIMER OF ALL WARRANTIES.
SageMathCell is designed to be compatible with recent versions of:
- Internet Explorer
If you notice issues with any of these browsers, please let us know.