iredmail-doc/en_US/upgrade/0-upgrade.ubuntu.14.04-16.0...

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# Fixes you need after upgrading Ubuntu from 14.04 to 16.04
[TOC]
## Apache
Ubuntu 16.04 ships Apache 2.4, there's no mysql auth module for Apache
available, so you must disable all mysql auth related settings in Apache
config files. For example:
* /etc/apache2/apache2.conf
* /etc/apache2/conf-available/awstats.conf
* /etc/apache2/conf-available/cluebringer.conf
## Postfix
```
postconf -e daemon_directory='/usr/lib/postfix/sbin'
postconf -e shlib_directory='/usr/lib/postfix'
```
* Incorrect `daemon_directory` causes Postfix cannot start.
* Incorrect `shlib_directory` causes Postfix cannot find pcre/mysql/pgsql/ldap modules.
## iRedAPD
iRedAPD requires package `python-pymysql`:
```
apt -y install python-pymysql
```
## Roundcube webmail
Make sure you have settings below in Roundcube config file `config/config.inc.php`:
```
// Required if you're running PHP 5.6 or later
$config['imap_conn_options'] = array(
'ssl' => array(
'verify_peer' => false,
'verify_peer_name' => false,
),
);
// Required if you're running PHP 5.6 or later
$config['smtp_conn_options'] = array(
'ssl' => array(
'verify_peer' => false,
'verify_peer_name' => false,
),
);
```
## PHP [OPTIONAL]
> NOTE: This step is toally optional if you're fine with old PHP release.
php was not upgraded to 7.0 automatically, have to install them manually:
```
apt-get install php-json php-gd php-mcrypt php-curl mcrypt php-intl php-xml php-mbstring php-mysql libapache2-mod-php
```
### Nginx and php-fpm
If you're running Nginx, you must install package `php-fpm` too:
```
apt install php-fpm
```
php-fpm daemon socket file is changed:
* old one: `/var/run/php-fpm.socket`
* new one: `/var/run/php/php7.0-fpm.sock`
iRedMail hard-codes php-fpm socket file in `/etc/nginx/nginx.conf` or
`/etc/nginx/conf.d/default.conf`, you must update them to use new socket file.
## Fail2ban
After upgrading Fail2ban, it will fail to start due to duplicate parameter
`port =` in file `/etc/fail2ban/jail.conf` under section `[pam-generic]` like
below:
```
[pam-generic]
...
port = all
...
port = anyport
```
Please comment out either one of them, then Fail2ban should be happy to start.