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How can I manually set date and time to future in EC2 instance and make it permanent, so it won't reset after reboot ?

I can change date using this command:

$ sudo timedatectl set-time "2017-12-09 16:00:00"
$ timedatectl 
      Local time: Sat 2017-12-09 16:00:01 UTC
  Universal time: Sat 2017-12-09 16:00:01 UTC
        RTC time: Sat 2017-12-09 16:00:02
       Time zone: Etc/UTC (UTC, +0000)
 Network time on: no
NTP synchronized: no
 RTC in local TZ: no

OS on EC2:

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 16.04.3 LTS
Release:    16.04
Codename:   xenial

What else should I do to make this permanent ?

The purpose of this adjustment is to set the date to future, so I can test few things.

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  • What OS are you using? Nov 2, 2017 at 14:22
  • @Hunter.S.Thompson Updated the question with OS. Nov 2, 2017 at 14:39
  • I wrote an answer I feel will meet your needs better than what you asked. Tell me if that doesn't...
    – Zip
    Nov 2, 2017 at 17:22

2 Answers 2

0

You can setup ntp for your instance.

Install the package ntp

apt-get/yum install ntp

Edit the configuration

nano /etc/ntp.conf

Add an ntp server to the config file, depending on the country you live in find the appropriate server(Just google "your_country_name ntp server"). Depending on your OS, the configuration file might have server instead of pool or vise versa.

server/pool 0.ntp_server_in_your_country iburst

Restart and enable the ntpd daemon.

systemctl enable ntpd && systemctl start ntpd

ntp will make sure you have the correct time every time you restart the server, that is because it synchronizes the time with that of the server.

1
  • This will sync the time but I need to manually set the time to future and keep it that way, so I can test some things. Nov 2, 2017 at 14:37
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Libfaketime, if preloaded with your application can add offsets or set specific times as the current time. It may work better than setting a system wide change.

It can also set a system wide time if you need, though.

Basic usage is:

LD_PRELOAD=/usr/local/lib/libfaketime.so.1 FAKETIME="2017-12-09 16:00:00" commandyouneed

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