Guilty Pleasure

rmhk -- quickly remove known host key
#! /bin/zsh

USAGE="usage: ${0:t} hostname\n  Removes hostname host key from ssh known_hosts"

if [[ $# -ne 1 || $1 == -* ]]; then
  echo $USAGE
  exit 
fi

host=$1

sed -i~ -e "/^$host/d" "$HOME/.ssh/known_hosts"