Change Ubuntu time and date for specific application

Question

Is there any application which can manipulate time and date for any specific application? If I change date and time of system then browser can't let me access internet. Any help will be appreciated. Thank you

Answer 1

You can use faketime to tell processes it's a different time.

Install it via:

sudo apt install faketime

Then just run your application like this:

faketime -f '-5d' date

This calls date. So just substitute date with whatever you like.

The example goes 5 days back change that part to whatever you like.

If you want to learn more about how you can use faketime, check out its man page:

man faketime

Note that this only works after you installed it.

If you're curious how to achieve this for an application you launch from the Dash, check out this answer.