禁用/var/spool/mail消息

Question

我有一项任务，每分钟都要做一次推拉。问题是当没有更新时，它会在/var/spool/mail/user中记录一条消息，上面写着已经更新了。

The cron job is * * * * * cd /home/user/dir && git pull

是否有一种方法可以在每次执行git操作时禁止它记录该消息？

完整的日志消息是：

From user@localhost.localdomain  Tue Aug 28 10:21:04 2018
Return-Path: <user@localhost.localdomain>
X-Original-To: user
Delivered-To: user@localhost.localdomain
Received: by localhost.localdomain (Postfix, from userid 1000)
    id 2C1D3207F8E3; Tue, 28 Aug 2018 10:21:04 -0400 (EDT)
From: "(Cron Daemon)" <user@localhost.localdomain>
To: user@localhost.localdomain
Subject: Cron <user@localhost> cd /home/user/dir && git pull
Content-Type: text/plain; charset=UTF-8
Auto-Submitted: auto-generated
Precedence: bulk
X-Cron-Env: <XDG_SESSION_ID=701>
X-Cron-Env: <XDG_RUNTIME_DIR=/run/user/1000>
X-Cron-Env: <LANG=en_US.UTF-8>
X-Cron-Env: <SHELL=/bin/sh>
X-Cron-Env: <HOME=/home/user>
X-Cron-Env: <PATH=/usr/bin:/bin>
X-Cron-Env: <LOGNAME=user>
X-Cron-Env: <USER=user>
Message-Id: <20180828142104.2C1D3207F8E3@localhost.localdomain>
Date: Tue, 28 Aug 2018 10:21:04 -0400 (EDT)

Already up-to-date.

Answer 1

添加/dev/null将忽略生成的标准消息。只有在出错的情况下才会发出信息。

修改后的cron作业*** cd /home/user/dir & git拉> /dev/null