Generate and copy ssh key to hosts (in order to play with ansible)

copy_key.sh

USER=someuser
PASSWORD=somepass
FILENAME="hosts.txt"

echo "Creating ssh key..."
ssh-keygen -t rsa -P '' -f ~/.ssh/id_rsa -y
echo "Set StrictHostKeyChecking to no (/etc/ssh/ssh_config)..."
sed -i '/StrictHostKeyChecking/c StrictHostKeyChecking no' /etc/ssh/ssh_config

echo "Install sshpass..."
rpm -q sshpass || yum -y install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm && yum -y install sshpass

echo "Copy to all hosts..."

while IFS='' read -r LINE || [[ -n "$LINE" ]]; do

  echo "Working on $LINE" 
  sshpass -p $PASSWORD ssh-copy-id -i ${USER}@${LINE}

done < "$FILENAME"