Ubuntu 上的 libpcre2-dev 依赖项未解决问题答案

【问题标题】：libpcre2-dev dependencies unmet problem on UbuntuUbuntu 上的 libpcre2-dev 依赖项未解决问题
【发布时间】：2022-01-04 14:13:50
【问题描述】：

我的问题是我想在 ubuntu 上安装 OwnCloud，长话短说，我不得不将 PHP 从 v8 降级到 v7.2，然后我发现了问题

老实说，我真的不知道确切的问题，但是当我运行升级命令时，例如，我得到了这个错误

You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
 libpcre2-dev : Depends: libpcre2-posix2 (= 10.39-2+ubuntu21.10.1+deb.sury.org+1) but it is not installed
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).

即使我运行 apt --fix-broken install 命令，我也会收到以下消息：

Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Correcting dependencies... Done
The following package was automatically installed and is no longer required:
  libpcre2-posix3
Use 'sudo apt autoremove' to remove it.
The following additional packages will be installed:
  libpcre2-posix2
The following NEW packages will be installed:
  libpcre2-posix2
0 upgraded, 1 newly installed, 0 to remove and 7 not upgraded.
12 not fully installed or removed.
Need to get 0 B/8,300 B of archives.
After this operation, 33.8 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
(Reading database ... 251030 files and directories currently installed.)
Preparing to unpack .../libpcre2-posix2_10.39-2+ubuntu21.10.1+deb.sury.org+1_amd64.deb ...
Unpacking libpcre2-posix2:amd64 (10.39-2+ubuntu21.10.1+deb.sury.org+1) ...
dpkg: error processing archive /var/cache/apt/archives/libpcre2-posix2_10.39-2+ubuntu21.10.1+deb.sury.
org+1_amd64.deb (--unpack):
 trying to overwrite '/usr/lib/x86_64-linux-gnu/libpcre2-posix.so.3', which is also in package libpcre
2-posix3:amd64 10.37-0ubuntu2
Errors were encountered while processing:
 /var/cache/apt/archives/libpcre2-posix2_10.39-2+ubuntu21.10.1+deb.sury.org+1_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

我想解决这个问题，但最重要的是，我想了解更多关于 Linux 的知识，所以任何解释都非常受欢迎。谢谢！

【问题讨论】：

正如文字所说：no longer required: libpcre2-posix3 .......所以请尝试使用sudo apt remove libpcre2-posix3删除
您好，感谢您的回复，但是当我执行命令时，与第一个错误的输出相同

标签： linux ubuntu

【解决方案1】：

我遇到了相反的情况（posix3 而不是 posix2）：

The following package was automatically installed and is no longer required:
  libpcre2-posix2
Use 'apt autoremove' to remove it.
The following additional packages will be installed:
  libpcre2-posix3
The following NEW packages will be installed:
  libpcre2-posix3

这对我有用。（对你来说是libpcre2-posix3）

sudo dpkg --purge libpcre2-posix2
sudo apt --fix-broken install

之后一切都好。

希望这会有所帮助。

【讨论】：

它对我有用，无需升级/降级等+1

【解决方案2】：

我之前想降级 php8.0 -> php7.4 时遇到了同样的问题。

以下命令解决了这个问题：

 srcFile="/etc/apt/sources.list.d/ondrej-ubuntu-php-impish.list"

 sed -i 's/# //g' ${srcFile}
 apt update
 apt autoclean
 apt autoremove -f -y

如果一切顺利，你仍然需要 php7.2，见下图：

如果你使用的是php-gearman，需要添加ppa:ondrej/pkg-gearman
如果您使用的是 apache2，建议您添加 ppa:ondrej/apache2
如果你使用的是nginx，建议添加ppa:ondrej/nginx-mainline

安装php7.2：

 LC_ALL=C.UTF-8 add-apt-repository ppa:ondrej/php <<< "2"
 apt install php7.2 -y

【讨论】：