Problem scenario
You try to run "kubeadm init", but you receive this error:
[ERROR FileExisting-conntrack]: conntrack not found in system path
[preflight] If you know what you are doing, you can make a check non-fatal with--ignore-preflight-errors=...
What should you do?
Solution
Install conntrack.
If you are using SUSE Linux run this:
sudo zypper -n install conntrack-tools
If you are using Debian/Ubuntu Linux:
sudo apt -y install conntrack