Sage

Installation

Sage 4.2.1

• Installing Sage 4.2.1, Ubuntu 9.10 32bit i686, on Ubuntu Jaunty 9.04.

#better install it as standard user (or create a custom user for sage)
tar -xv --lzma -f sage-4.2.1-linux-Ubuntu_9.10-i686-Linux.tar.lzma
mv sage-4.2.1-linux-Ubuntu_9.10-i686-Linux sage-4.2.1
sudo ln -s /mnt/data/sage-4.2.1 /sage

• Sage complains that version `GLIBCXX_3.4.11' not found (required by /sage/local/lib/libgmpxx.so.3). Fix is to install locally a more up-to-date version of libstdc++ (see [1]):

cd /sage/local/lib
wget http://sage.math.washington.edu/home/wstein/tmp/fedora11/libstdc++.so.6.0.12
ln -s libstdc++.so.6.0.12 libstdc++.so.6

Sage 3.2.1

Install instruction for Ubuntu - using binary image sage-3.2.1-ubuntu_32bit-xeon-i686-Linux.tar.gz. Script below will install sage in /usr/local/sage-3.2.1, and create a copy of sage in path /usr/local/bin.

# (as root)

% cd /usr/local
% tar -xvzf .../sage-3.2.1-ubuntu_32bit-xeon-i686-Linux.tar.gz
% mv sage-3.2.1-Ubuntu-x86_64-opteron-x86_64-Linux sage-3.2.1
% chmod a+rX -R sage-3.2.1     
% cp /usr/local/sage-3.2.1/sage /usr/local/bin
% vi /usr/local/bin/sage
#  --> change SAGE_ROOT to /usr/local/sage-3.2.1

After installation, launch sage from root again because Sage needs to update some links, create files, etc...

% sage

Reference

m=0x1234; print m                    # Convert hex to decimal
print hex(m)                         # Convert decimal to hex

Notebook

Notebook is the html interface to Sage. It is launched with the command notebook (see also (The Sage Notebook object).

% sage
sage> notebook(address='',port=8000)                       # To make notebook available on port 8000, even to remote computer
sage> notebook(address='',port=8000, require_login=False)  # No login necessary
sage> notebook?                                            # Get help on notebook

% sage -notebook "address=localhost" "port=8000" "open_viewer=False"   # Launch notebook from command-line
% sage -notebook "address=''" "port=8000" "open_viewer=False"          # Launch notebook from command-line, even to remote computer - BEWARE no security!