==== 必填信息。没有填写将不予回复 ====
- iRedMail 版本号：iRedMail-0.9.5-1
- 使用哪个数据库存储用户帐号（OpenLDAP，MySQL，PostgreSQL）：还没有到这一步
- 使用的 Linux/BSD 发行版名称及版本号：ubuntu 16
- 与您的问题相关的日志信息：安装过程报错，见截图:

[ INFO ] Checking new version of iRedMail ...
[ INFO ] apt-get update ...
Get:1 http://security.ubuntu.com/ubuntu xenial-security InRelease [94.5 kB]
Hit:2 http://cn.archive.ubuntu.com/ubuntu xenial InRelease           
Hit:3 http://cn.archive.ubuntu.com/ubuntu xenial-updates InRelease
Hit:4 http://cn.archive.ubuntu.com/ubuntu xenial-backports InRelease
Fetched 94.5 kB in 2s (45.7 kB/s)                 
Reading package lists... Done
[ INFO ] Fetching source tarballs ...
[ INFO ] + 1 of 3: http://iredmail.org/yum/misc/roundcubem … ete.tar.gz
[ INFO ] + 2 of 3: http://iredmail.org/yum/misc/iRedAPD-1.9.1.tar.bz2
[ INFO ] + 3 of 3: http://iredmail.org/yum/misc/iRedAdmin-0.6.1.tar.bz2
[ INFO ] Validate packages ...
md5sum: misc/roundcubemail-1.2.0-complete.tar.gz: No such file or directory
misc/roundcubemail-1.2.0-complete.tar.gz: FAILED open or read
md5sum: misc/iRedAPD-1.9.1.tar.bz2: No such file or directory
misc/iRedAPD-1.9.1.tar.bz2: FAILED open or read
misc/iRedAdmin-0.6.1.tar.bz2: OK
md5sum: WARNING: 2 listed files could not be read
    [ FAILED ]
<< ERROR >> MD5 check failed. Script exit ...

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