"Building an Apptainer container requires root (sudo) access. As such, this cannot be directly done on CSC's supercomputers. Instead you must use your own computer, or a virtual computer where you have root access, to build the container image."
The above section should be updated to reflect the more recent documentation on creating containers:
"Root access into Puhti and Mahti is not permitted. Namespaces have also been disabled due to security issues involved. However, with a few restrictions, Apptainer can still be used by an unprivileged user to build a container using the fakeroot feature."
The tutorial on building Apptainer containers from scratch still states that:
"Building an Apptainer container requires root (sudo) access. As such, this cannot be directly done on CSC's supercomputers. Instead you must use your own computer, or a virtual computer where you have root access, to build the container image."
The above section should be updated to reflect the more recent documentation on creating containers:
"Root access into Puhti and Mahti is not permitted. Namespaces have also been disabled due to security issues involved. However, with a few restrictions, Apptainer can still be used by an unprivileged user to build a container using the fakeroot feature."