Centos
生成預設 DKIM 密鑰：無法確定主機的域名，因此跳過預設密鑰生成
我正在遵循本指南
https://www.linuxtechi.com/configure-domainkeys-with-postfix-on-centos-7/
當我到達本節時，它給出了一個錯誤
# opendkim-default-keygen Generating default DKIM keys: Cannot determine host's domain name, so skipping default key generation.我確實設置了主機名
# hostname domain.org # cat /etc/hostname domain.org # cat /etc/hosts # Your system has configured 'manage_etc_hosts' as True. # As a result, if you wish for changes to this file to persist # then you will need to either # a.) make changes to the master file in /etc/cloud/templates/hosts.redhat.tmpl # b.) change or remove the value of 'manage_etc_hosts' in # /etc/cloud/cloud.cfg or cloud-config from user-data # # The following lines are desirable for IPv4 capable hosts 127.0.0.1 domain domain.org 127.0.0.1 localhost.localdomain localhost 127.0.0.1 localhost4.localdomain4 localhost4 # The following lines are desirable for IPv6 capable hosts ::1 domain domain.org ::1 localhost.localdomain localhost ::1 localhost6.localdomain6 localhost6 # cat /etc/sysconfig/network NETWORKING=yes HOSTNAME=domain.org NOZEROCONF=yes（我用 . 替換了所有域名實例
domain。）網上其他頁面只說設置主機名，就是設置好了。
# cat /etc/centos-release CentOS Linux release 7.5.1804 (Core)
感謝 RubberStamp 的評論，我剛剛查看了
opendkim-default-keygen文件並在另一個視窗中手動複製和粘貼每一行。# less /usr/sbin/opendkim-default-keygen [root@domain postfix]# prog=opendkim [root@domain postfix]# KEYGEN=/usr/sbin/$prog-genkey [root@domain postfix]# DKIM_SELECTOR=default [root@domain postfix]# DKIM_KEYDIR=/etc/$prog/keys [root@domain postfix]# ls /etc/opendkim keys KeyTable SigningTable TrustedHosts [root@domain postfix]# ls /etc/opendkim/keys [root@domain postfix]# hostname --domain [root@domain postfix]# mkdir -p $DKIM_KEYDIR [root@domain postfix]# $KEYGEN -D $DKIM_KEYDIR -s $DKIM_SELECTOR -d domain.org [root@domain postfix]# chown -R root:$prog $DKIM_KEYDIR [root@domain postfix]# chmod 640 $DKIM_KEYDIR/$DKIM_SELECTOR.private [root@domain postfix]# chmod 644 $DKIM_KEYDIR/$DKIM_SELECTOR.txt