> anka modify 13.1-openjdk-11.0.14.1-jenkins cpu --help
usage: cpu [options] [vcpu]

   Set number of vcpu cores and frequency

arguments:
  vcpu                     Number of vcpu cores

options:
  -c,--cores <val>         Number of vcpu cores
  -f,--frequency <val>     Set the base vcpu frequency (Hz)