know_hosts on development environment

escape.sh

#!/bin/sh
# escape know_hosts problem
# if you can not connect remote-server with ssh because of changing dns record frequestly,
# you can use this script. set error message "Offending key for IP in /home/takenoko/.ssh/known_hosts:688"
argv=$1

known_hosts=$(echo $argv | awk -F':' '{print $1}')
if [ -z $konw_hosts ]; then
  exit 1
fi
line=$(echo $argv | awk -F':' '{print $2}')
if [ -z $line ]; then
  exit 1
fi

sed -i.bak -e "${line}d" $known_hosts

ssh -o 'StrictHostKeyChecking no' -i ~/.ssh/mykey.pem ubuntu@x.x.x.xでよかった。