Fix error in hosts file

Job ID: 34257467

Budget: $10 – $30 USD

Hi,
My Network consist of: Two Cisco Routers + one Cisco Switch + Ubuntu VM + Ubuntu Server VM + CSR1kv VM.
I try to ping all Devices in my Network but get this Error in the image.
Can you help me to fix this Error?
Related categories: Linux Cisco Ubuntu Network Administration Ansible