我一直只使用 13.10，但两周前需要安装 12.04。使用默认guest帐户，我获得了其他一组帐户，如您所见：
我曾经在安装 13.10 时禁用过 guest 账户，但不知道这些别名和 qmail 账户有什么用？
另一个问题是，每次我尝试从更新管理器更新我的 12.04 或使用时，sudo apt-get install都会收到如下错误：
The hostname -f command returned: $1
Your system needs to have a fully qualified domain name (fqdn) in
order to install the var-qmail packages.
Installation aborted.
dpkg: error processing qmail (--configure): subprocess installed post-installation script returned error exit status 1 dpkg: dependency problems prevent configuration of qmail-run: qmail-run depends on qmail (>= 1.06-2.1); however: Package qmail is not configured yet. dpkg: error processing qmail-run (--configure): dependency problems - leaving unconfigured No apport report written because the error message indicates its a followup error from a previous failure.
Errors were encountered while processing: qmail qmail-run E: Sub-process /usr/bin/dpkg returned an error code (1)
您能否建议是否可以禁用这些帐户并尝试删除这些 qmail 内容？
答案1
请按照以下步骤删除qmail：
- sudo apt-get remove --auto-remove qmail-uids-gids
- sudo apt-get purge qmail-uids-gids
您应该看到以下消息：
Purging this package does not remove the qmail uids and gids. You might want to do this manually, e.g.:
# userdel alias
# userdel qmaild
# userdel qmaill
# userdel qmailp
# userdel qmailq
# userdel qmailr
# userdel qmails
# groupdel qmail
# groupdel nofiles
使用sudo userdel和sudo groupdel来完成工作：
sudo userdel alias
sudo userdel qmaild
sudo userdel qmaill
sudo userdel qmailp
sudo userdel qmailq
sudo userdel qmailr
sudo userdel qmails
sudo groupdel qmail
sudo groupdel nofiles