・現状確認
[root@alma]# ls -al /etc/opendkim/keys/papa-net.com/
-rw------- 1 root root 900 Apr 1 12:34 20250401.private
-rw------- 1 root root 500 Apr 1 12:34 20250401.txt
・所有権とアクセス権を opendkim に変更
[root@alma]# chown -R opendkim:opendkim /etc/opendkim/keys/papa-net.com/
・変更確認
[root@alma]# ls -al /etc/opendkim/keys/papa-net.com/
-rw------- 1 opendkim opendkim 900 Apr 1 12:34 20250401.private
-rw------- 1 opendkim opendkim 500 Apr 1 12:34 20250401.txt