Estou executando esse comando e a reposta
alura@ansible:~/ansible$ ansible wordpress -i hosts -m shell -a 'echo ola, mundo' 192.168.0.176 | UNREACHABLE! => { "changed": false, "msg": "Failed to connect to the host via ssh: alura@192.168.0.176: Permission denied (publickey,password).", "unreachable": true