In the update instructions "uspace" refers to the 'linuxcnc-uspace' packages to be used for -rt-kernels as opposed to the 'linuxcnc' packages for rtai-kernels.
Use the Search function to search for
linuxcnc
.
The package is called "linuxcnc" for RTAI kernels and "linuxcnc-uspace" for preempt-rt.
