小编Sis*_*sir的帖子

我试图安装 sendmail 但它在尝试生成 ssl 证书时挂起。我取消了安装过程，后来杀死了锁定任何新软件包无法安装的进程。

但是每当我运行apt-get install <package_name>它时，它都会返回到 sendmail 安装并尝试安装 ssl 证书。

我已经重新启动系统，但问题仍然存在。

我该如何解决？

命令行信息

sudo dpkg --configure -a
Setting up sendmail-bin (8.15.2-3) ...
Updating sendmail environment ...
Reading configuration from /etc/mail/sendmail.conf.
Validating configuration.
Writing configuration to /etc/mail/sendmail.conf.
Writing /etc/cron.d/sendmail.
Disabling HOST statistics file(/var/lib/sendmail/host_status).
Reading configuration from /etc/mail/sendmail.conf.
Validating configuration.
Writing configuration to /etc/mail/sendmail.conf.
Writing /etc/cron.d/sendmail.
Could not open /etc/mail/databases(No such file or directory), creating it.
Reading configuration from /etc/mail/sendmail.conf.
Validating configuration.
Creating /etc/mail/databases...

Checking filesystem, this may …

我已经从 ubuntu 18.04 到 20.04 进行了版本升级。删除了之前安装的 PHP。然后我跑

sudo apt install php-cli

但我遇到以下错误：

The following packages have unmet dependencies:
 php7.4-cli : Depends: php7.4-common (= 7.4.3-4ubuntu2.4) but 7.4.8-1+ubuntu18.04.1+deb.sury.org+3 is to be installed
              Depends: php7.4-json but it is not going to be installed
              Depends: php7.4-opcache but it is not going to be installed
              Depends: php7.4-readline but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

所以我怀疑7.4.8-1+ubuntu18.04.1+deb.sury.org+3包裹仍然有效？我已经检查了/etc/apt/sources.list目录/etc/apt/sources.list.d/，但没有找到任何与该包匹配的源。

我还应该看哪里？

编辑

apt …