Print a unix timestamp as a period of time ago.
Pipe a unix timestamp to timeago.
▶ date +%s | ./timeago
0 seconds ago
▶ echo 1573726417 | ./timeago
21 seconds ago
▶ echo 1573723417 | ./timeago
53 minutes ago
▶ echo 1573721417 | ./timeago
1 hour ago
▶ echo 1573321417 | ./timeago
5 days ago