Singularity version 3.2.1

Squashfs-tools is installed on login2 as described on post Problem on login node 2 for building singularity images.

However the needed binary is in /usr/sbin . After adding /usr/sbin into path I was able to fully use singularity 3.2.1. Ie for building images and running code.

It would be nice having a module loadable by module load for people not familliar with path manipulation that may want to upgrade.

I will do more test on the new version later.