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date | UNIX | 株式会社CONFRAGE
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初版2007/02/12：最終更新日2007/02/12
date
dateコマンドは日本標準時（JST）を表示するコマンドです。
使用方法は

date

というように実行すると以下のようにJSTが表示されます。

Tue Feb 12 15:38:46 JST 2007

上記、表示フォーマットを変更したい場合は + をつけてフォーマットを指定します。
以下はyyyymmdd形式で表示する例です。

% date +%Y%m%d
20070213
%
前日を表示
dateコマンドで、-vオプションを使用して前日を計算することが出来ます。
但し、AIXサーバなどの-vオプションが使用できない場合、現在時刻から前日を計算したい場合は、以下のように環境変数を変更して前日日付を表示します。

env TZ=JST+15 date +%Y%m%d

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