我有一个django项目是否有任务向所有用户发送每周电子邮件通知。以下是方法的步骤： -
1.处理管理命令，发送每周电子邮件通知。
2.编辑crontab如下： -
$ sudo crontab -e
#For testing purposes I have edited as below
1 * * * * pathto/virtualenv pathto/manage.py notify_email
3.重新启动crontab
$sudo service cron restart
cron stop/waiting
cron start/running, process 16218
4.检查我在下面尝试过的日志状态
$tail -n 10 /var/log/syslog
Mar 19 13:36:08 praneeth-Latitude-E6400 cron[15293]: (CRON) INFO (Skipping @reboot jobs -- not system startup)
Mar 19 13:37:01 praneeth-Latitude-E6400 CRON[15364]: (praneeth) CMD (/home/praneeth/wru-pam/venv/bin/python3.4 /home/praneeth/wru-pam/pam_site/manage.py notify_about_changes)
Mar 19 13:37:02 praneeth-Latitude-E6400 postfix/sendmail[15367]: fatal: open /etc/postfix/main.cf: No such file or directory
Mar 19 13:37:02 praneeth-Latitude-E6400 CRON[15363]: (praneeth) MAIL (mailed 1 byte of output; but got status 0x004b, #012)
Mar 19 13:38:01 praneeth-Latitude-E6400 CRON[15416]: (praneeth) CMD (/home/praneeth/wru-pam/venv/bin/python3.4 /home/praneeth/wru-pam/pam_site/manage.py notify_about_changes)
Mar 19 13:38:01 praneeth-Latitude-E6400 postfix/sendmail[15418]: fatal: open /etc/postfix/main.cf: No such file or directory
Mar 19 13:38:01 praneeth-Latitude-E6400 CRON[15415]: (praneeth) MAIL (mailed 1 byte of output; but got status 0x004b, #012)
Mar 19 13:39:01 praneeth-Latitude-E6400 CRON[15457]: (praneeth) CMD (/home/praneeth/wru-pam/venv/bin/python3.4 /home/praneeth/wru-pam/pam_site/manage.py notify_about_changes)
Mar 19 13:39:01 praneeth-Latitude-E6400 postfix/sendmail[15459]: fatal: open /etc/postfix/main.cf: No such file or directory
Mar 19 13:39:01 praneeth-Latitude-E6400 CRON[15456]: (praneeth) MAIL (mailed 1 byte of output; but got status 0x004b, #012)
5.我已经通过以下forum解决方案来查看终端中的邮件，并在我下载邮件时找到1到43个条目
$sudo mail
N 1 Cron Daemon Mon Mar 16 14:21 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 2 Cron Daemon Mon Mar 16 14:22 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 3 Cron Daemon Mon Mar 16 14:23 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 4 Cron Daemon Mon Mar 16 14:24 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 5 Cron Daemon Mon Mar 16 14:25 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 6 Cron Daemon Mon Mar 16 14:26 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 7 Cron Daemon Mon Mar 16 14:27 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 8 Cron Daemon Mon Mar 16 14:28 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 9 Cron Daemon Mon Mar 16 14:29 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 10 Cron Daemon Mon Mar 16 14:30 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 11 Cron Daemon Mon Mar 16 14:31 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 12 Cron Daemon Mon Mar 16 14:32 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 13 Cron Daemon Mon Mar 16 14:33 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 14 Cron Daemon Mon Mar 16 14:34 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 15 Cron Daemon Mon Mar 16 14:35 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 16 Cron Daemon Mon Mar 16 14:36 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 17 Cron Daemon Mon Mar 16 14:37 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 18 Cron Daemon Mon Mar 16 14:38 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 19 Cron Daemon Mon Mar 16 14:39 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 20 Cron Daemon Mon Mar 16 14:40 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 21 Cron Daemon Mon Mar 16 14:41 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 22 Cron Daemon Mon Mar 16 14:42 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 23 Cron Daemon Mon Mar 16 14:43 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 24 Cron Daemon Mon Mar 16 14:44 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 25 Cron Daemon Mon Mar 16 14:45 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 26 Cron Daemon Mon Mar 16 14:46 22/1194 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 27 Cron Daemon Mon Mar 16 14:47 54/3457 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 28 Cron Daemon Mon Mar 16 14:48 54/3457 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 29 Cron Daemon Mon Mar 16 14:49 54/3457 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 30 Cron Daemon Mon Mar 16 14:50 54/3457 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 31 Cron Daemon Mon Mar 16 14:51 54/3457 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 32 Cron Daemon Mon Mar 16 14:52 54/3457 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 33 Cron Daemon Mon Mar 16 14:53 54/3457 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 34 Cron Daemon Mon Mar 16 14:54 54/3457 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 35 Cron Daemon Mon Mar 16 14:55 54/3457 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 36 Cron Daemon Mon Mar 16 14:56 54/3457 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 37 Cron Daemon Mon Mar 16 14:57 54/3457 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 38 Cron Daemon Mon Mar 16 14:58 54/3457 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 39 Cron Daemon Mon Mar 16 14:59 21/1323 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 40 Cron Daemon Mon Mar 16 15:00 21/1323 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 41 Cron Daemon Mon Mar 16 15:01 21/1323 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 42 Cron Daemon Mon Mar 16 15:02 21/1323 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
N 43 Cron Daemon Mon Mar 16 15:03 21/1323 Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneet
如果我输入1，我收到如下信息： - 消息9：
From root@praneeth-Latitude-E6400.corp.ad.wrs.com Mon Mar 16 14:29:02 2015
Return-Path: <root@praneeth-Latitude-E6400.corp.ad.wrs.com>
Date: Mon, 16 Mar 2015 14:29:01 -0400
From: root@praneeth-Latitude-E6400.corp.ad.wrs.com (Cron Daemon)
To: root@praneeth-Latitude-E6400.corp.ad.wrs.com
Subject: Cron <root@praneeth-Latitude-E6400> cd /home/praneeth/wru-pam/pam_site && /home/praneeth/wru-pam/venv/bin/python3.4 manage.py notify_about_changes
Content-Type: text/plain; charset=ANSI_X3.4-1968
X-Cron-Env: <SHELL=/bin/sh>
X-Cron-Env: <HOME=/root>
X-Cron-Env: <PATH=/usr/bin:/bin>
X-Cron-Env: <LOGNAME=root>
Status: R
发送每周电子邮件通知的解决方案的另一方＆＃34;我能够通过kronos，django-celery与rabbitmq经纪人轻松地发送自动电子邮件通知。 但我想使用crontab 尽可能简化任务。＆＃34;
我很感激指导提前致谢
答案 0 :(得分：0)
也许this可以帮助您解决cron抛出的后缀错误：
一种可能的解决方案是重新配置postfix。可以使用以下命令重新配置：
sudo dpkg-reconfigure postfix
将显示用户界面。在每个屏幕上，选择以下值：
您可能需要编辑/etc/postfix/main.conf来更新邮件主机名。
答案 1 :(得分：0)
最后，我能够解决crontab中的前三个步骤，通过重新编辑crontab来发送电子邮件通知
$*/1 * * * * /home/praneeth/wru-pam/venv/bin/python3.4 /home/praneeth/wru-pam/pam_site/manage.py notify_about_changes --settings=project.settings.development
另外我发现第4步和第5步不是检查crontab日志状态的正确方法。