Jonah's questions

Hello, world!,

我有一个 VPS 设置，多个域名指向它。随意，我喜欢通过我正在处理的域名通过 SSH 访问它。因此，例如，如果我正在使用 做某事example1.com，我将使用 登录ssh [email protected]，如果我正在使用 工作example2.com，我将使用 登录ssh [email protected]。它们都指向同一台机器上的同一用户。然而，因为 SSH 跟踪服务器的指纹，它告诉我有一个违规的主机密钥，并让我确认访问。

$ ssh [email protected]
Warning: the ECDSA host key for 'example2.com' differs from the key for
the IP address '123.123.123.123'
Offending key for IP in /home/me/.ssh/known_hosts:33 
Matching host key in /home/me/.ssh/known_hosts:38
Are you sure you want to continue
connecting (yes/no)?

有没有办法忽略这个警告？谢谢！

我只是按照这个关于使用 Postfix/Dovecot/etc 设置邮件服务器的优秀教程。

我通过了，我可以很好地发送电子邮件。我使用的域是jonah.name. 但是，我无法接收来自外部电子邮件或其他内部邮箱的电子邮件。如果我尝试向其中的用户发送电子邮件，我会收到一封“未送达的邮件已退回给发件人”的电子邮件，告诉我该用户未知。这是出现在/var/log/mail.log：

Aug 17 21:31:27 localhost postfix/smtpd[810]: connect from gateway09.websitewelcome.com[69.93.179.27]
Aug 17 21:31:28 localhost postfix/trivial-rewrite[816]: warning: do not list domain jonah.name in BOTH mydestination and virtual_mailbox_domains
Aug 17 21:31:28 localhost postgrey[27058]: action=pass, reason=triplet found, client_name=gateway09.websitewelcome.com, client_address=69.93.179.27, [email protected], [email protected]
Aug 17 21:31:28 localhost postfix/smtpd[810]: 79B1D38947: client=gateway09.websitewelcome.com[69.93.179.27]
Aug 17 21:31:28 localhost postfix/cleanup[819]: 79B1D38947: message-id=<[email protected]>
Aug 17 21:31:28 localhost postfix/qmgr[732]: 79B1D38947: from=<[email protected]>, size=1634, nrcpt=1 (queue active)
Aug 17 21:31:28 localhost postfix/smtpd[810]: disconnect from gateway09.websitewelcome.com[69.93.179.27]
Aug 17 21:31:30 localhost postfix/smtpd[826]: connect from remotebox[127.0.0.1]
Aug 17 21:31:30 localhost postfix/trivial-rewrite[816]: warning: do not list domain jonah.name in BOTH mydestination and virtual_mailbox_domains
Aug 17 21:31:30 localhost postfix/smtpd[826]: 622BF3894A: client=remotebox[127.0.0.1]
Aug 17 21:31:30 localhost postfix/cleanup[819]: 622BF3894A: message-id=<[email protected]>
Aug 17 21:31:30 localhost postfix/smtpd[826]: disconnect from remotebox[127.0.0.1]
Aug 17 21:31:30 localhost postfix/qmgr[732]: 622BF3894A: from=<[email protected]>, size=2050, nrcpt=1 (queue active)
Aug 17 21:31:30 localhost postfix/trivial-rewrite[816]: warning: do not list domain jonah.name in BOTH mydestination and virtual_mailbox_domains
Aug 17 21:31:30 localhost amavis[30938]: (30938-10) Passed CLEAN, [69.93.179.27] <[email protected]> -> <[email protected]>, Message-ID: <[email protected]>, mail_id: jbjlO+jljnPM, Hits: -0.001, size: 1634, queued_as: 622BF3894A, 1855 ms
Aug 17 21:31:30 localhost postfix/smtp[821]: 79B1D38947: to=<[email protected]>, relay=127.0.0.1[127.0.0.1]:10024, delay=2.3, delays=0.41/0.01/0/1.9, dsn=2.0.0, status=sent (250 2.0.0 from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as 622BF3894A)
Aug 17 21:31:30 localhost postfix/qmgr[732]: 79B1D38947: removed
Aug 17 21:31:30 localhost postfix/local[827]: 622BF3894A: to=<[email protected]>, relay=local, delay=0.02, delays=0/0.01/0/0.01, dsn=5.1.1, status=bounced (unknown user: "jonah")
Aug 17 21:31:30 localhost postfix/cleanup[819]: 65CAF38953: message-id=<[email protected]>
Aug 17 21:31:30 localhost postfix/bounce[828]: 622BF3894A: sender non-delivery notification: 65CAF38953
Aug 17 21:31:30 localhost postfix/qmgr[732]: 65CAF38953: from=<>, size=3832, nrcpt=1 (queue active)
Aug 17 21:31:30 localhost postfix/qmgr[732]: 622BF3894A: removed
Aug 17 21:31:30 localhost postfix/smtp[829]: 65CAF38953: to=<[email protected]>, relay=mail.nucleussystems.com[50.116.72.68]:25, delay=0.46, delays=0/0.01/0.33/0.11, dsn=2.0.0, status=sent (250 OK id=1T2U8g-0008VP-Qb)
Aug 17 21:31:30 localhost postfix/qmgr[732]: 65CAF38953: removed

日志确认（第 18 行）用户是“未知”的。我重新检查了所有连接到 MySQL 的配置文件，但没有发现任何缺陷。以下是 MySQL 虚拟配置文件：

# /etc/postfix/mysql_virtual_alias_domainaliases_maps.cf

user = mail
password = **password**
hosts = 127.0.0.1
dbname = mail
query = SELECT goto FROM alias,alias_domain
  WHERE alias_domain.alias_domain = '%d'
  AND alias.address=concat('%u', '@', alias_domain.target_domain)
  AND alias.active = 1

# /etc/postfix/mysql_virtual_alias_maps.cf

user = mail
password = **password**
hosts = 127.0.0.1
dbname = mail
table = alias
select_field = goto
where_field = address
additional_conditions = and active = '1'

# /etc/postfix/mysql_virtual_domain_maps.cf

user = mail
password = **password**
hosts = 127.0.0.1
dbname = mail
table = domain
select_field = domain
where_field = domain
additional_conditions = and backupmx = '0' and active = '1'

# /etc/postfix/mysql_virtual_mailbox_domainaliases_maps.cf

user = mail
password = **password**
hosts = 127.0.0.1
dbname = mail
query = SELECT maildir FROM mailbox, alias_domain
  WHERE alias_domain.alias_domain = '%d'
  AND mailbox.username=concat('%u', '@', alias_domain.target_domain )
  AND mailbox.active = 1

# /etc/postfix/mysql_virtual_mailbox_maps.cf

user = mail
password = **password**
hosts = 127.0.0.1
dbname = mail
table = mailbox
select_field = CONCAT(domain, '/', local_part)
where_field = username
additional_conditions = and active = '1'

我想创建一个运行两个程序的脚本。这部分很简单，但有一个问题：如果第一个退出，我想杀死第二个。我怎样才能做到这一点？

编辑

我尝试在另一个程序退出后通过它的 PID 杀死该程序，但该程序是hamster-time-tracker，这是一个立即退出的 Python 应用程序，显然产生了另一个进程。我该如何解决这个问题？有什么方法可以生成另一个 PID 吗？

编辑 2

弄清楚了。我不得不运行python /usr/bin/hamster-time-tracker而不是运行hamster-time-tracker，它一直在运行。