A function definition to quickly remove host+key entries from .ssh/known_hosts. Useful for when a node is replaced, or you otherwise need to remove a group of hosts.

sshrm.sh

# Remove any entries from SSH known_hosts file
# that match the specified string.
sshrm () {
  node=$1
  echo "Removing $node from SSH known hosts"
  sed -i '.bak' -e "/^$node/d" ~/.ssh/known_hosts
}