Find out if file has been modified within the last 2 minutes

Question

In a bash script I want to check if a file has been changed within the last 2 minutes.

I already found out that I can access the date of the last modification with <

Answer 1

Here's an even simpler version that uses shell math over expr:

SECONDS (for idea)

echo $(( $(date +%s) - $(stat file.txt  -c %Y) ))

MINUTES (for answer)

echo $(( ($(date +%s) - $(stat file.txt  -c %Y)) / 60 ))

HOURS

echo $(( ($(date +%s) - $(stat file.txt  -c %Y)) / 3600 ))