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Raspberry Piでcronを使った時の話し

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rubyで作ったプログラムをcronで実行したところ、うまく動作しなかったのでログを確認したところ、以下のエラーメッセージが出力されていた。
ちなみに、cronのログは/var/log/syslogにある。

Aug 23 22:12:04 raspberrypi /USR/SBIN/CRON[2331]: (CRON) info (No MTA installed, discarding output)

Raspberry PiではデフォルトでMTAがインストールされていないらしく、postfixをインストールして無事解決。

$ sudo apt-get install postfix

#cronが動かなかったのは恥ずかしいぐらい初歩的な理由なので略…

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