- Check ssh connectivity
- Check internet connectivity from VM.
curl google.com - Check timezone is configured properly on all the VMs
timedatectl - Check NTP is working
timedatectl - Check disks and size
lsblk - Check memory and CPU size
htop - Check OS and Kernel version
uname -rcat /etc/issue - Ensure hostname is unique on all the hosts
hostname - Check outbound SMTP traffic
telnet smtp.sendgrid.net 587