Received: from assp ([127.0.0.1] helo=localhost) by ASSP.nospam with
        SMTP (2.4.1); 30 Jun 2014 11:11:20 +0400
helo

command_directory = /usr/sbin
daemon_directory = /usr/lib/postfix
data_directory = /var/lib/postfix
unknown_local_recipient_reject_code = 550
mynetworks = 127.0.0.0/8,10.10.10.25/32
relay_domains = domain.name
sendmail_path = /usr/sbin/sendmail
mailq_path = /usr/bin/mailq
inet_protocols = ipv4
smtpd_delay_reject = no
transport_maps = hash:/etc/postfix/transport

125      inet  n       -       -       -       -       smtpd
        -o receive_override_options=no_header_body_checks
...
дальше дефолт

nagios /etc/nagios/nagios.cfg

/etc/init.d/nagios start
или
nagios /etc/nagios/nagios.cfg & 

[root@files ~]# getent passwd
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
adm:x:3:4:adm:/var/adm:/sbin/nologin
lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin
sync:x:5:0:sync:/sbin:/bin/sync
shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown
halt:x:7:0:halt:/sbin:/sbin/halt
mail:x:8:12:mail:/var/spool/mail:/sbin/nologin
uucp:x:10:14:uucp:/var/spool/uucp:/sbin/nologin
operator:x:11:0:operator:/root:/sbin/nologin
games:x:12:100:games:/usr/games:/sbin/nologin
gopher:x:13:30:gopher:/var/gopher:/sbin/nologin
ftp:x:14:50:FTP User:/var/ftp:/sbin/nologin
nobody:x:99:99:Nobody:/:/sbin/nologin
vcsa:x:69:69:virtual console memory owner:/dev:/sbin/nologin
saslauth:x:499:76:"Saslauthd user":/var/empty/saslauth:/sbin/nologin
postfix:x:89:89::/var/spool/postfix:/sbin/nologin
sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin
dbus:x:81:81:System message bus:/:/sbin/nologin
administrator:*:4294967295:4294967295:Administrator:/home/DOMAIN/administrator:/bin/false
megatest:*:4294967295:4294967295:megatest:/home/DOMAIN/megatest:/bin/false
krbtgt:*:4294967295:4294967295:krbtgt:/home/DOMAIN/krbtgt:/bin/false
tester:*:4294967295:4294967295:tester:/home/DOMAIN/tester:/bin/false
guest:*:4294967295:4294967295:Guest:/home/DOMAIN/guest:/bin/false