Jun 13 14:29:11 fc1 <info> postfix/postfix-script[13316]: starting the Postfix
mail system
Jun 13 14:29:11 fc1 <critical> postfix/master[13317]: fatal: bind INADDR_ANY
port 25: Address already in use
Eine übersicht über die gestarteten Dienste und belegten Ports bietet beispielsweise unter Linux der Befehl netstat -atlu:[][vgl. ]QIM
[root@fc1 root]# netstat -atlu
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 *:32768 *:* LISTEN
tcp 0 0 *:imaps *:* LISTEN
tcp 0 0 *:pop3s *:* LISTEN
tcp 0 0 *:ldap *:* LISTEN
tcp 0 0 localhost:9999 *:* LISTEN
tcp 0 0 *:imap *:* LISTEN
tcp 0 0 *:sunrpc *:* LISTEN
tcp 0 0 *:http *:* LISTEN
tcp 0 0 *:smtps *:* LISTEN
tcp 0 0 *:ftp *:* LISTEN
tcp 0 0 *:ssh *:* LISTEN
tcp 0 0 *:smtp *:* LISTEN
tcp 0 0 *:https *:* LISTEN
tcp 0 0 localhost:ldap localhost:32773 ESTABLISHED
tcp 0 0 localhost:32773 localhost:ldap ESTABLISHED
tcp 0 0 localhost:32777 localhost:ldap ESTABLISHED
tcp 0 0 localhost:ldap localhost:32777 ESTABLISHED
udp 0 0 *:32768 *:*
udp 0 0 *:32769 *:*
udp 0 0 *:32770 *:*
udp 0 0 *:948 *:*
udp 0 0 225.0.0.7:ha-cluster *:*
udp 0 0 *:ha-cluster *:*
[...]