WARNING (November 2015)
This page needs to be checked and updated.
Installing Sage on cloud.sagemath.com
#command to fetch Sage; substitute the URL for the most recent release of Sage at http://files.sagemath.org/linux/64bit/index.html
# Unpack the file. This should take about *TWO MINUTES* (71,870 files in there!)
tar xf *.tar.lzma
# Remove the .tar.lzma file now that you've unpacked it
# Create a new symbolic link pointing sage at your directory
ln -s sage-5.10-linux-64bit-ubuntu_12.04.2_lts-x86_64-Linux sage
# Build and run Sage to make sure everything worked
cd sage; ./sage -br
Making worksheets use this version of Sage
# Go back to your home directory, if you're not already there
# Make a directory called bin
# Go to your new directory
# Make a new symbolic link in bin pointing to your sage directory (assuming it is called sage)
ln -s ~/sage/sage .
# Hit the wrench icon and click the Worksheet Server button in the Restart ... section. This will make worksheets use your version of Sage.