在Ubuntu中启用Crontab日志记录的配置方法
<p style='margin: 0px; padding: 5px 0px; outline: none; font-size: 14px; line-height: 30px; font-family: tahoma, arial, "Microsoft YaHei";'>在ubuntu下安装crontab后，系统默认的是不开启crontab的日志记录的，启用crontab的日志的办法：</p>
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修改rsyslog文件，将/etc/rsyslog.d/50-default.conf 文件中的#cron.*前的#删掉；<br>
重启rsyslog服务service rsyslog restart；<br>
重启cron服务service cron restart；<br>
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<span><u>复制代码</u></span>
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代码如下:</p>
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more /var/log/cron.log；</div>
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<br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>就可以查看运行时的日志文件，如果在日志文件中出现：</span></p>
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<span><u>复制代码</u></span>
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代码如下:</p>
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No MTA installed, discarding output</div>
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那么就是说，crontab执行脚本时是不会直接错误的信息输出，而是会以邮件的形式发送到你的邮箱里，这时候就需要邮件服务器了，如果你没有安装邮件服务器，它就会报这个错。如果是测试，可以用下面的办法来解决：</p>
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在每条定时脚本后面加入：<br>
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<span><u>复制代码</u></span>
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代码如下:</p>
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>/dev/null 2>&1</div>
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<br style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'><span style='font-family: tahoma, arial, "Microsoft YaHei"; font-size: 14px;'>就可以解决No MTA installed, discarding output的问题。</span></p>
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