Quitar la extensión del archivo y borrar esta línea.
#!/bin/bash
# Para dar permiso al usuario actual: sudo chmod 755 actualizar
printf "\e[91m"
echo "*************************"
echo "*  sudo apt-get update  *"
echo "*************************"
sudo apt-get update
printf "\e[92m"
echo "*****************************"
echo "*  sudo apt-get -y upgrade  *"
echo "*****************************"
sudo apt-get -y upgrade
printf "\e[93m"
echo "**********************************************"
echo "*  sudo apt-get autoclean && sudo apt clean  *"
echo "**********************************************"
sudo apt-get autoclean && sudo apt clean
printf "\e[94m"
echo "**********************************"
echo "*  sudo apt-get -y dist-upgrade  *"
echo "**********************************"
sudo apt-get -y dist-upgrade --fix-missing