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--- blog:installing_sage_on_ubuntu_11.10 [2012-01-22 09:51] – brb
+++ blog:installing_sage_on_ubuntu_11.10 [2012-02-13 18:37] (current) – [Finishing up the installation] brb
@@ Line 1: / Line 1: @@
-====== Installing sage on ubuntu 11.10 ======
+====== Installing sage on ubuntu ======
+Sage is a very powerful computer algebra system. Especially nice is the LaTeX integration using sagetex. Here's how to set this up:
+===== Compile yourself =====
 Install prerequisite libraries
   sudo apt-get install build-essential m4 readline-common libreadline-dev texlive xpdf evince tk8.5-dev gfortran
-Download the current version of the sources
+Download the current version of the sources and compile them
   wget http://mirror.switch.ch/mirror/sagemath/src/sage-4.8.tar
+  tar xvf sage-4.8.tar
+===== Download pre-build =====
+Download the file for you platform from here http://www.sagemath.org/download-linux.html
+Unpack/move the build or downloaded files to /opt, this gives you a directory /opt/sage-4.xy...
+===== Finishing up the installation =====
+Make a symolic link to this directory:
+  sudo ln -s /opt/sage-4.... /opt/sage
+Change the ownership of the files to root
+  sudo chown root:root /opt/sage/* -R
+Run sage as root for the first time to update some paths which are absolute
+  cd /opt/sage-4....
+  sudo sage
+After that, you should be able to run sage as a normal user
+  sage
+  sage: 2+2
+  sage:
+If you get errors when starting up, then probably the first start as root has created some files in the directory ~./sage which now belong to root instead of you (USER)
+<code>
+cd .sage
+sudo chown $USER:$USER * -R
+sage
+</code>
+Should now work.
+=====
+ Setting up sagetex for LaTeX =====
+If you use LaTeX and want to integrate sage into your latex files (which gives you all the power of sage/maxima/maple/... directly inside you LaTeX file!):
+<code>
+  mkdir ~/texmf
+  ln -s /opt/sage/local/share/texmf/tex/generic/sagetex/ ~/textmf/sagetex
+  sudo texhash
+</code>
+Now you have the sagetex.sty file from the sage installation available. If you run texlive, it's a good idea to hunt down and rename the outdated sagetex.sty file which probably hangs around:
+  cd /usr/share/texmf-texlive/tex/latex/sagetex
+  ls
+  sudo mv sagetex.sty sagetex.sty.off
+  sudo texhash
+To get started with sagetex read this guide: http://www.sagemath.org/doc/tutorial/sagetex.html