FreeBSD 相關

● DNS Server 問題

could not listen on UDP socket: permission denied
creating IPv4 interface em0 failed; interface ignored

【解決】

不要使用 DHCP，要設為固定 IP

● crontab 不要寄信的語法

* * * * * root /usr/local/sbin/updatephp.sh > /dev/null 2>&1

● 申請 Let’s Encrypt 免費憑證

# pkg install -y py37-certbot
# certbot certonly --manual

Apache 設定範例

<VirtualHost *:443>
ServerName www.bojack.com:443
ServerAdmin bojack@bojack.com
SSLEngine on
SSLCertificateFile "/usr/local/etc/apache24/certs/www.bojack.com/fullchain.pem"
SSLCertificateKeyFile "/usr/local/etc/apache24/certs/www.bojack.com/privkey.pem"
</VirtualHost>

https://certbot.eff.org/

● 錯誤訊息：user disappeared during update error

使用以下指令重建帳號資料

# /usr/sbin/pwd_mkdb -p /etc/master.passwd

● 郵件 mail log 位置

/var/log/maillog