====== Команда date ======

  * [[Локализация системы]]
===== Установка времени =====

==== Linux ====

  * [[https://www.garron.me/en/linux/set-time-date-timezone-ntp-linux-shell-gnome-command-line.html|Set Time, Date Timezone in Linux from Command Line]]
<code>
date +%T -s "11:14:00"

timedatectl set-time "2018-10-06 10:35:00"
</code>

===== Вывод времени в нужном формате =====

==== Linux/FreeBSD ====
<code>
$ date

$ date -u

$ date "+%Y-%m-%d_%H:%M:%S"
</code>

==== FreeBSD ====
<code>
$ date -v-1d "+%Y.%m.%d"
</code>

==== Linux ====
<code>
$ date --date "1 day ago" +%Y-%m-%d

$ date --date "1 hour ago" "+%Y-%m-%d %H"
</code>