Works well after some config

My config on Ubuntu 12.04.5 LTS x86. I had to create a SQL Server authentication login.

wget “http://localhost/components/com_mtree/attachment.php?link_id=493&cf_id=24” -O /usr/lib/nagios/plugins/check_dbmirroring.pl
chmod 755 /usr/lib/nagios/plugins/check_dbmirroring.pl
apt-get install libdbd-sybase-perl
nano /etc/nagios3/resource.cfg
# MS SQL Server user/password
$USER7$=
$USER8$=

nano /etc/nagios3/commands.cfg
define command{
command_name check_dbmirroring
command_line $USER1$/check_dbmirroring.pl -H $HOSTADDRESS$ -d $ARG1$ -u $USER7$ -p $USER8$
}

nano /etc/nagios3/conf.d/sql4.cfg
define service {
host_name sql4
service_description ActivityLog Mirroring
check_command check_dbmirroring!ActivityLog
use generic-service
}