Debuging using gdb

IoT Modules Development tools
1

Hello.
I studying doc https://docs.legato.io/latest/howToDebugGDB.html
I want to start debugging with gdb

  1. i building helloWorld.adef
  2. instal to target
    app install helloWorld.wp75.update 192.168.2.2
  3. i get problem when
    cd /legato/systems/current/appsWriteable/helloWorld
    app runProc helloWorld --exe=./bin/gdbserver – localhost:2000 ./bin/helloWorldApp
    command returns nothing
    how to verify that gdbserver is running?
    Someone followed this instruction?