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--- user_guide:howto:jupyter [2021/06/03 18:14] – lkastner
+++ user_guide:howto:jupyter [2021/06/04 13:15] – [jupyter] Mention symlink issue on ubuntu lkastner
@@ Line 9: / Line 9: @@
 ninja -C build/Opt install
 </code>
-in your polymake source. Then please use the polymake binary from the folder you installed polymake in.
+if working with the polymake source. Then please use the polymake binary from the folder you installed polymake in.
+If you use a version of polymake installed via your package manager, make sure you have the ''polymake-config'' binary. Try running
+<code>
+polymake-config --version
+</code>
+in a terminal. For example for Ubuntu it is not enough to have the ''polymake'' package installed, you will also need ''libpolymake-dev''.
 ===== Setup =====
@@ Line 56: / Line 62: @@
 ===== Troubleshooting =====
+If the polymake kernel does not start for you, look at the output of jupyter in the terminal and search for any error messages.
+==== JuPyMake.PolymakeError: polymake::Main - /usr/lib/polymake/shared is not a symlink ====
+This error sometimes appears with polymake installed by the package manager. It can be fixed by manually setting the symlink
+<code>
+cd /usr/lib/polymake
+sudo ln -s ../../share/polymake shared
+</code>
 ==== polymake configuration ====
-The default configuration used by the jupyter kernel is the one in `$HOME/.polymake`. If you need to reconfigure a rules file, it is easiest to reconfigure it outside of jupyter. Note that the configuration is only saved to `$HOME/.polymake` once polymake gets closed using `exit;`.
+The default configuration used by the jupyter kernel is the one in ''$HOME/.polymake''. If you need to reconfigure a rules file, it is easiest to reconfigure it outside of jupyter. Note that the configuration is only saved to ''$HOME/.polymake'' once polymake gets closed using ''exit;''.
 Advance users can use a different configuration folder in the following way: