These are YAML not SHELL.
+```SHELL arch: the architecture of the machine. nr_node: number of NUMA nodes. nr_cpu: number of logical CPUs. memory: memory size of the machine. +```
- These fields are from the file which in $LAB_SRC/hosts.
- Here is an example of these fields in the host file:
+```SHELL arch: aarch64 nr_node: 4 nr_cpu: 96 memory: 256G
+```
2.23.0