ตอนติดตั้ง apt-get install dovecot-common dovecot-imapd dovecot-pop3d
----------------------------------------------
........
hostname: Name or service not known
.............................................................
Errors were encountered while processing:
dovecot-common
dovecot-imapd
dovecot-pop3d
E: Sub-process /usr/bin/dpkg returned an error code (1)
-------------------------------------------------------------------------------
ลองตรวจสอบ hostname -f ถ้ามีข้อความว่า hostname: Name or service not known
ใช้คำสั่ง hostname greanjub (กรณีชื่อ host เป็น greanjub เด้อ)
แล้วลองตรวจสอบ hostname -f ถ้ามีข้อความว่า greanjub แล้วลอง ติดตั้งอีกครั้งครับ....
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