yubishell() {
 (
 gpg-connect-agent --quiet updatestartuptty /bye
 export GPG_TTY=$(tty)
 export SSH_AUTH_SOCK="$HOME/.gnupg/S.gpg-agent.ssh"
 export PS1="\[\e[31m\][YUBI]\[\e[0m\] \$ "
 if which kr > /dev/null 2>&1; then
     kr unpair
 fi
 bash --norc
 )
}