A bash script that times how long it takes to run apt-get update, upgrade and snap refresh

time-apt-get-update.sh

#!/bin/bash

# store the current date into a variable called startTime
startTime=$(date +"%s")
echo "Start time: $(date)"

# do the updating or whatever here
sudo apt-get update && sudo apt-get upgrade -y && sudo apt-get autoremove -y && sudo snap refresh

finishTime=$(date +"%s")
echo "End time: $(date)"

# write out how long script took to run
diff=$(($finishTime-$startTime))
echo "$(($diff / 3600)) hours, $((($diff / 60) % 60)) minutes and $(($diff % 60)) seconds elapsed."