Connection error while Using the Curator Command

Elastic Stack Elasticsearch
1 
      Hi

I have installed the curator and PIP.

after that i have used curator,curator show command ..They are working fine.

But when i try to user other commans like

curator show --all-indices

iam getting: "INFO Job starting:show indices

ERROR Connection failure"

And one more query .. is it compulsory to install the APT and YEM repository?...

wget -qO - https://packages.elastic.co/GPG-KEY-elasticsearch | sudo apt-key add -

When i use this I am getting Error that

sudo:apt-key is not a command

Can anyone please help me in this.Iam new to this Concept

Thanks & Regards

Balaji

2

Only if you want to install something from the repo, yes. For curator, no.

Can you show us the full call and response of the curator command?