今天，我正在使用全新安装的 Ubuntu 20.04（大约 10 天前），并且像往常一样发出了sudo apt update和命令。sudo apt upgrade
但是，我遇到了几个错误，并且打开了一堆对话框，询问是否将错误发送给 Ubuntu 社区。然后我注意到输出sudo apt upgrade告诉我一些软件包“已被保留”。
重新启动系统后，我遇到以下错误： 启动时 sssd 错误
我很惊讶地发现 SSSD 已经安装在我的系统上，我自己没有安装它。然后，我检查了 SSSD 包的安装时间；这是输出grep sssd /var/log/dpkg.log：
2020-10-05 10:59:17 install sssd-common:amd64 <none> 2.3.1-2
2020-10-05 10:59:17 status half-installed sssd-common:amd64 2.3.1-2
2020-10-05 10:59:17 status unpacked sssd-common:amd64 2.3.1-2
2020-10-05 10:59:17 install sssd-ad-common:amd64 <none> 2.3.1-2
2020-10-05 10:59:17 status half-installed sssd-ad-common:amd64 2.3.1-2
2020-10-05 10:59:17 status unpacked sssd-ad-common:amd64 2.3.1-2
2020-10-05 10:59:17 install sssd-krb5-common:amd64 <none> 2.3.1-2
2020-10-05 10:59:17 status half-installed sssd-krb5-common:amd64 2.3.1-2
2020-10-05 10:59:17 status unpacked sssd-krb5-common:amd64 2.3.1-2
2020-10-05 10:59:17 install sssd-ad:amd64 <none> 2.3.1-2
2020-10-05 10:59:17 status half-installed sssd-ad:amd64 2.3.1-2
2020-10-05 10:59:17 status unpacked sssd-ad:amd64 2.3.1-2
2020-10-05 10:59:17 install sssd-ipa:amd64 <none> 2.3.1-2
2020-10-05 10:59:17 status half-installed sssd-ipa:amd64 2.3.1-2
2020-10-05 10:59:17 status unpacked sssd-ipa:amd64 2.3.1-2
2020-10-05 10:59:17 install sssd-krb5:amd64 <none> 2.3.1-2
2020-10-05 10:59:17 status half-installed sssd-krb5:amd64 2.3.1-2
2020-10-05 10:59:17 status unpacked sssd-krb5:amd64 2.3.1-2
2020-10-05 10:59:17 install sssd-ldap:amd64 <none> 2.3.1-2
2020-10-05 10:59:17 status half-installed sssd-ldap:amd64 2.3.1-2
2020-10-05 10:59:17 status unpacked sssd-ldap:amd64 2.3.1-2
2020-10-05 10:59:17 install sssd-proxy:amd64 <none> 2.3.1-2
2020-10-05 10:59:17 status half-installed sssd-proxy:amd64 2.3.1-2
2020-10-05 10:59:17 status unpacked sssd-proxy:amd64 2.3.1-2
2020-10-05 10:59:17 install sssd:amd64 <none> 2.3.1-2
2020-10-05 10:59:17 status half-installed sssd:amd64 2.3.1-2
2020-10-05 10:59:17 status unpacked sssd:amd64 2.3.1-2
2020-10-05 10:59:17 install sssd-dbus:amd64 <none> 2.3.1-2
2020-10-05 10:59:17 status half-installed sssd-dbus:amd64 2.3.1-2
2020-10-05 10:59:17 status unpacked sssd-dbus:amd64 2.3.1-2
2020-10-05 10:59:17 install sssd-tools:amd64 <none> 2.3.1-2
2020-10-05 10:59:17 status half-installed sssd-tools:amd64 2.3.1-2
2020-10-05 10:59:17 status unpacked sssd-tools:amd64 2.3.1-2
2020-10-05 11:02:47 configure sssd-common:amd64 2.3.1-2 <none>
2020-10-05 11:02:47 status unpacked sssd-common:amd64 2.3.1-2
2020-10-05 11:02:47 status half-configured sssd-common:amd64 2.3.1-2
2020-10-05 11:02:52 status installed sssd-common:amd64 2.3.1-2
2020-10-05 11:02:52 configure sssd-proxy:amd64 2.3.1-2 <none>
2020-10-05 11:02:52 status unpacked sssd-proxy:amd64 2.3.1-2
2020-10-05 11:02:52 status half-configured sssd-proxy:amd64 2.3.1-2
2020-10-05 11:02:52 status installed sssd-proxy:amd64 2.3.1-2
2020-10-05 11:02:52 configure sssd-dbus:amd64 2.3.1-2 <none>
2020-10-05 11:02:52 status unpacked sssd-dbus:amd64 2.3.1-2
2020-10-05 11:02:52 status half-configured sssd-dbus:amd64 2.3.1-2
2020-10-05 11:02:52 status installed sssd-dbus:amd64 2.3.1-2
2020-10-05 11:02:52 configure sssd-ad-common:amd64 2.3.1-2 <none>
2020-10-05 11:02:52 status unpacked sssd-ad-common:amd64 2.3.1-2
2020-10-05 11:02:52 status half-configured sssd-ad-common:amd64 2.3.1-2
2020-10-05 11:02:53 status installed sssd-ad-common:amd64 2.3.1-2
2020-10-05 11:02:53 configure sssd-krb5-common:amd64 2.3.1-2 <none>
2020-10-05 11:02:53 status unpacked sssd-krb5-common:amd64 2.3.1-2
2020-10-05 11:02:53 status half-configured sssd-krb5-common:amd64 2.3.1-2
2020-10-05 11:02:53 status installed sssd-krb5-common:amd64 2.3.1-2
2020-10-05 11:02:54 configure sssd-krb5:amd64 2.3.1-2 <none>
2020-10-05 11:02:54 status unpacked sssd-krb5:amd64 2.3.1-2
2020-10-05 11:02:54 status half-configured sssd-krb5:amd64 2.3.1-2
2020-10-05 11:02:54 status installed sssd-krb5:amd64 2.3.1-2
2020-10-05 11:02:54 configure sssd-ldap:amd64 2.3.1-2 <none>
2020-10-05 11:02:54 status unpacked sssd-ldap:amd64 2.3.1-2
2020-10-05 11:02:54 status half-configured sssd-ldap:amd64 2.3.1-2
2020-10-05 11:02:54 status installed sssd-ldap:amd64 2.3.1-2
2020-10-05 11:02:55 configure sssd-ad:amd64 2.3.1-2 <none>
2020-10-05 11:02:55 status unpacked sssd-ad:amd64 2.3.1-2
2020-10-05 11:02:55 status half-configured sssd-ad:amd64 2.3.1-2
2020-10-05 11:02:55 status installed sssd-ad:amd64 2.3.1-2
2020-10-05 11:02:55 configure sssd-tools:amd64 2.3.1-2 <none>
2020-10-05 11:02:55 status unpacked sssd-tools:amd64 2.3.1-2
2020-10-05 11:02:55 status half-configured sssd-tools:amd64 2.3.1-2
2020-10-05 11:02:55 status installed sssd-tools:amd64 2.3.1-2
2020-10-05 11:02:55 configure sssd-ipa:amd64 2.3.1-2 <none>
2020-10-05 11:02:55 status unpacked sssd-ipa:amd64 2.3.1-2
2020-10-05 11:02:55 status half-configured sssd-ipa:amd64 2.3.1-2
2020-10-05 11:02:55 status installed sssd-ipa:amd64 2.3.1-2
2020-10-05 11:02:55 configure sssd:amd64 2.3.1-2 <none>
2020-10-05 11:02:55 status unpacked sssd:amd64 2.3.1-2
2020-10-05 11:02:55 status half-configured sssd:amd64 2.3.1-2
2020-10-05 11:02:55 status installed sssd:amd64 2.3.1-2
如您所见，软件包已于当天早上安装完毕！我不知道为什么。有人能告诉我是否有其他软件包将其作为依赖项提取，或者是否有办法摆脱启动时错误？如果我删除 SSSD 是否安全？如果安全，该怎么做？
先感谢您！