Mirando en el log de zentyal, me encuentro con esto:
2013/12/02 20:24:39 ERROR> Sudo.pm:231 EBox::Sudo::_rootError - root command APACHE_CONFDIR=/var/lib/zentyal/conf/ apache2ctl restart failed.
Error output: apache2: Syntax error on line 45 of /var/lib/zentyal/conf/apache2.conf: Could not open configuration file /etc/apache2/mods-available/deflate.conf: No such file or directory
Command output: Action 'restart' failed.
The Apache error log may have more information.
.
Exit value: 1 at /usr/share/perl5/Error.pm line 182
Error::throw('EBox::Exceptions::Sudo::Command', 'cmd', 'APACHE_CONFDIR=/var/lib/zentyal/conf/ apache2ctl restart', 'output', 'ARRAY(0xd933344)', 'error', 'ARRAY(0x9f20840)', 'exitValue', 1, ...) called at /usr/share/perl5/EBox/Sudo.pm line 231
EBox::Sudo::_rootError('/usr/bin/sudo -p sudo: /var/lib/zentyal/tmp/IWqDjhQ7nM.cmd 2>...', 'APACHE_CONFDIR=/var/lib/zentyal/conf/ apache2ctl restart', 256, 'ARRAY(0xd933344)', 'ARRAY(0x9f20840)') called at /usr/share/perl5/EBox/Sudo.pm line 201
EBox::Sudo::_root(1, 'APACHE_CONFDIR=/var/lib/zentyal/conf/ apache2ctl restart') called at /usr/share/perl5/EBox/Sudo.pm line 152
EBox::Sudo::root('APACHE_CONFDIR=/var/lib/zentyal/conf/ apache2ctl restart') called at /usr/share/perl5/EBox/WebAdmin.pm line 157
EBox::WebAdmin::_manageApache('EBox::WebAdmin=HASH(0xd0dd89c)', 'restart') called at /usr/share/perl5/EBox/WebAdmin.pm line 105
EBox::WebAdmin::_daemon('EBox::WebAdmin=HASH(0xd0dd89c)', 'restart') called at /usr/share/perl5/EBox/WebAdmin.pm line 202
EBox::WebAdmin::_enforceServiceState('EBox::WebAdmin=HASH(0xd0dd89c)', 'restart', 1, 'restartModules', 1) called at /usr/share/perl5/EBox/Module/Service.pm line 968
EBox::Module::Service::_regenConfig('EBox::WebAdmin=HASH(0xd0dd89c)', 'restart', 1, 'restartModules', 1) called at /usr/share/perl5/EBox/Module/Service.pm line 988
EBox::Module::Service::restartService('EBox::WebAdmin=HASH(0xd0dd89c)', 'restartModules', 1) called at /usr/share/perl5/EBox/Util/Init.pm line 127
EBox::Util::Init::moduleAction('webadmin', 'restartService', 'start') called at /usr/share/perl5/EBox/Util/Init.pm line 87
EBox::Util::Init::start() called at /etc/rc2.d/S20zentyal line 31
main::main() called at /etc/rc2.d/S20zentyal line 69
2013/12/02 20:24:39 ERROR> Service.pm:991 EBox::Module::Service::__ANON__ - Error restarting service: root command APACHE_CONFDIR=/var/lib/zentyal/conf/ apache2ctl restart failed.
Error output: apache2: Syntax error on line 45 of /var/lib/zentyal/conf/apache2.conf: Could not open configuration file /etc/apache2/mods-available/deflate.conf: No such file or directory
Command output: Action 'restart' failed.
The Apache error log may have more information.
.
Exit value: 1
2013/12/02 20:24:39 INFO> Init.pm:90 EBox::Util::Init::start - Start modules finished