Mac os terminal time

Часы в Mac OS X устанавливаются автоматически по умолчанию, но если вы хотите установить точное время или ищете решение для командной строки, чтобы установить системное время, вы можете сделать это с помощью инструмента ntpdate или стандартной даты. команда.

Установите системную дату в Mac OS X из командной строки с центральным сервером времени

Для ntpdate, который устанавливает дату и время на основе времени с центрального сервера, доступ к которому осуществляется через Интернет, вы можете указать его либо на серверах времени Apple, либо на pool.ntp.org, чтобы получить точное время:

sudo ntpdate -u time.apple.com

При появлении запроса введите пароль администратора, и вскоре вы увидите что-то вроде следующего:

4 Jul 14:30:11 ntpdate: adjust time server 17.151.16.14 offset 0.000336 sec

Смещение в конце позволяет узнать, насколько отличались системные часы от вновь установленного времени. В этом примере системные часы были отключены на смехотворно малую долю секунды.

Как правило, вам не нужно делать это, если вы используете функцию «Установить дату и время автоматически» в системных настройках «Дата и время», хотя, устанавливая часы в командной строке, вы можете быть уверены, что на каждом компьютере в сети отображается точное в то же время.

Установите системную дату Mac вручную с помощью команды терминала

Другой подход состоит в том, чтобы установить дату вручную из командной строки, используя командную строку «date», где date в формате ЧЧ] MM, то есть месяц Date Hour Minute Year без разделения. Это выглядит примерно так:

Для этого примера будет установлена ​​дата «12 июля 2018 года в 12:23».

Вы можете узнать больше об установке даты с помощью даты –help, которая также указывает, что вы можете даже установить секунды, если хотите.

Трюк с датой — это то, что вы хотели бы использовать, если у рассматриваемого Mac нет доступа в Интернет по той или иной причине.

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Changing system date from Terminal – OS X recovery

When you’re booting your Mac from the recovery partition and are planning to reinstall OS X, you might be met by the following message:

An error occurred while preparing the installation. Try running again

Now, if you haven’t used your Mac for a while, the error might be caused by an incorrect system date setting. You can check this by going to utilities and opening the terminal. Once in the terminal enter the following command and hit return/enter:

The result of this command will be the date that the system currently has been set to. For some reason, it might have been reset to 2001, in which case we need to set it to the right date. To do this, we enter a new command. This command will be entered as follows:

Every bracket should be replaced with a two-digit number based on UTC time. Below you see what the command should be for your current time and date – . To avoid trouble with timezones, we will use UTC time instead (). Which means, you can just enter it exactly like this:

Enter the command and hit return. You can then check if it was set correctly by running the first command again. If the date was wrong, it was likely that which caused the error, and after you quit the terminal it should be able to install OS X just fine.

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Set the System Time in Mac OS X from the Command Line

The clock in Mac OS X sets itself automatically by default, but if you want to set the precise time or are looking for a command line solution to set system time, you can do so with a tool called ntpdate, or the standard ‘date’ command.

Set System Date in Mac OS X from Command Line with a Central Time Server

For ntpdate, which sets the date and time based on the time from a central server accessed via the internet, you’d want to point it either at Apple’s time servers or pool.ntp.org as follows to get the exact time:

sudo ntpdate -u time.apple.com

Enter the admin password when asked, and you’ll soon see something like the following:

4 Jul 14:30:11 ntpdate[28267]: adjust time server 17.151.16.14 offset 0.000336 sec

The offset at the end lets you know how divergent the system clock was with the newly set time. In this example, the system clock was off by a laughably small fraction of a second.

You generally don’t need to do this if you use the “Set date and time automatically” feature within the Date & Time system preferences, though by setting clocks through the command line you could be sure that each machine on a network shows the exact same time.

Set the Mac System Date Manually by Terminal Command

Another approach is to set the date manually from the command line by using the “date” command string, where date is in the [mm][dd]HH]MM[yy] format, which is Month Date Hour Minute Year without any separation. This looks something like:

For that example, it would set the date as “July 12 2018 at 12:23”.

You can learn more about setting the date with date –help, which also specifies that you can even set the seconds if you want to.

The ‘date’ trick is what you’d want to use if the Mac in question does not have internet access for one reason or another.

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