Hack the Route Start free Open app Services and tunnels
faketime
Runs one command as if the clock read another time, without changing any clock.
faketime loads libfaketime into one program, which then answers that program's calls for the time with a
shifted one. Nothing else on the machine sees it. It is the honest way to test what a wrong clock breaks: certificates
that are not yet valid or expired, tokens and caches that time out.
faketime command usage
faketime -f OFFSET COMMAND faketime 'YYYY-MM-DD hh:mm:ss' COMMAND
Options
-
-f -730d - shift the clock 730 days back (+730d ahead; also h, m, y)
-
'2030-01-01 00:00:00' - start the clock at that moment
faketime examples
-
faketime -f -730d curl -sS https://bank.lab/ - Fetches a page as if it were two years ago: the certificate is not yet valid.
-
faketime -f +730d curl -sS https://bank.lab/ - The same two years ahead: the certificate has expired.
-
faketime '2030-01-01 00:00:00' date - Prints the date a program would see under a fixed fake time.
Pitfalls
- A program built statically, or one that reads the time straight from the kernel, is not fooled.