问题[uninstall](unix)

如果单击，密码和密钥别名seahorse将不会运行。

从终端启动时，出现此错误：

seahorse: error while loading shared libraries: libldap_r-2.4.so.2: cannot open shared object file: No such file or directory

当试图找到这样的包并可能安装它时，我得到：

$ apt-cache policy 'libldap*'
libldap2:
  Installed: (none)
  Candidate: (none)
  Version table:
libldap-common:
  Installed: 2.5.13+dfsg-0ubuntu0.22.04.1
  Candidate: 2.5.13+dfsg-0ubuntu0.22.04.1
  Version table:
 *** 2.5.13+dfsg-0ubuntu0.22.04.1 500
        500 http://archive.ubuntu.com/ubuntu jammy-updates/main amd64 Packages
        500 http://archive.ubuntu.com/ubuntu jammy-updates/main i386 Packages
        100 /var/lib/dpkg/status
     2.5.11+dfsg-1~exp1ubuntu3.1 500
        500 http://security.ubuntu.com/ubuntu jammy-security/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu jammy-security/main i386 Packages
     2.5.11+dfsg-1~exp1ubuntu3 500
        500 http://archive.ubuntu.com/ubuntu jammy/main amd64 Packages
        500 http://archive.ubuntu.com/ubuntu jammy/main i386 Packages
libldap-ocaml-dev:
  Installed: (none)
  Candidate: 2.4.2-1build3
  Version table:
     2.4.2-1build3 500
        500 http://archive.ubuntu.com/ubuntu jammy/universe amd64 Packages
libldap-dev:
  Installed: 2.5.13+dfsg-0ubuntu0.22.04.1
  Candidate: 2.5.13+dfsg-0ubuntu0.22.04.1
  Version table:
 *** 2.5.13+dfsg-0ubuntu0.22.04.1 500
        500 http://archive.ubuntu.com/ubuntu jammy-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     2.5.11+dfsg-1~exp1ubuntu3.1 500
        500 http://security.ubuntu.com/ubuntu jammy-security/main amd64 Packages
     2.5.11+dfsg-1~exp1ubuntu3 500
        500 http://archive.ubuntu.com/ubuntu jammy/main amd64 Packages
libldap-ocaml-dev-vpsg7:
  Installed: (none)
  Candidate: (none)
  Version table:
libldap-2.3-0:
  Installed: (none)
  Candidate: (none)
  Version table:
libldap-2.4-2:
  Installed: (none)
  Candidate: (none)
  Version table:
libldap-2.5-0:
  Installed: 2.5.13+dfsg-0ubuntu0.22.04.1
  Candidate: 2.5.13+dfsg-0ubuntu0.22.04.1
  Version table:
 *** 2.5.13+dfsg-0ubuntu0.22.04.1 500
        500 http://archive.ubuntu.com/ubuntu jammy-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     2.5.11+dfsg-1~exp1ubuntu3.1 500
        500 http://security.ubuntu.com/ubuntu jammy-security/main amd64 Packages
     2.5.11+dfsg-1~exp1ubuntu3 500
        500 http://archive.ubuntu.com/ubuntu jammy/main amd64 Packages
libldap-java:
  Installed: (none)
  Candidate: 5.0.0+dfsg1-1
  Version table:
     5.0.0+dfsg1-1 500
        500 http://archive.ubuntu.com/ubuntu jammy/universe amd64 Packages
        500 http://archive.ubuntu.com/ubuntu jammy/universe i386 Packages
libldap2-dev:
  Installed: 2.5.13+dfsg-0ubuntu0.22.04.1
  Candidate: 2.5.13+dfsg-0ubuntu0.22.04.1
  Version table:
 *** 2.5.13+dfsg-0ubuntu0.22.04.1 500
        500 http://archive.ubuntu.com/ubuntu jammy-updates/main amd64 Packages
        500 http://archive.ubuntu.com/ubuntu jammy-updates/main i386 Packages
        100 /var/lib/dpkg/status
     2.5.11+dfsg-1~exp1ubuntu3.1 500
        500 http://security.ubuntu.com/ubuntu jammy-security/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu jammy-security/main i386 Packages
     2.5.11+dfsg-1~exp1ubuntu3 500
        500 http://archive.ubuntu.com/ubuntu jammy/main amd64 Packages
        500 http://archive.ubuntu.com/ubuntu jammy/main i386 Packages
$ sudo apt-get --simulate install libldap-2.4-2
[sudo] password for vlastimil:                
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Package libldap-2.4-2 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
  libldap-common

E: Package 'libldap-2.4-2' has no installation candidate
$ sudo apt-get --simulate install libldap-2.4
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Note, selecting 'libldap-2.4-2' for regex 'libldap-2.4'
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

$ which seahorse 
/usr/local/bin/seahorse
$ whereis seahorse
seahorse: /usr/bin/seahorse /usr/local/bin/seahorse /usr/libexec/seahorse /usr/share/seahorse /usr/share/man/man1/seahorse.1.gz

所以我很自然地尝试/usr/bin/seahorse并启动并运行了它：

所以，我在下载目录中挖掘，发现：

/home/vlastimil/Downloads/seahorse/seahorse-3.31.91

时间戳为 2019-Feb-23。由 构建meson，但如何删除它？

在过去的几周里，我已经从单服务器设置为多服务器设置。我现在准备从原始服务器上卸载Let's Encrypt / Certbot 。（我已经使用HA Proxy设置了 SSL 终止。）

我试过了apt remove --purge letsencrypt。但这显示了我仍然需要的包：

Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages were automatically installed and are no longer required:
  bsdmainutils cpp-8 dh-python libapache2-mod-php7.3 libasan5 libbind9-161 libbison-dev libboost-iostreams1.67.0 libboost-system1.67.0 libc-dev-bin libcwidget3v5 libdns1104 libdns1110 libevent-2.1-6 libf2fs-format4 libf2fs5 libgfortran5
  libicu63 libip6tc0 libiptc0 libirs161 libisc1100 libisc1105 libisccc161 libisccfg163 libisl19 liblinear3 libllvm7 liblua5.2-0 liblwres161 libmemcachedutil2 libmpdec2 libperl5.28 libprocps7 libpython3.7 libpython3.7-minimal
  libpython3.7-stdlib linux-libc-dev ncal perl-modules-5.28 php-symfony-debug php7.3 php7.3-bcmath php7.3-fpm php7.3-mysql php7.3-pgsql php7.3-soap php8.0-memcached python3-asn1crypto python3-future python3-mock python3-pbr python3.7
  python3.7-minimal usb.ids
Use 'apt autoremove' to remove them.
The following packages will be REMOVED:
  letsencrypt*
0 upgraded, 0 newly installed, 1 to remove and 5 not upgraded.
After this operation, 30.7 kB disk space will be freed.
Do you want to continue? [Y/n]

我在 PHP7.3 的末尾，只剩下 1 个脚本在使用它。我不精通 Python。有人可以解释一下确定计算机不再需要的软件包列表的逻辑吗？

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事实证明，我只需要 openjdk 16 就可以运行我想要的，而拥有其他版本的 java 有点毫无意义。我的主要问题是程序默认为版本 8，我似乎无法修复它。

那么如何卸载版本 11 和 8 并保留 16？

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curl -fsSL https://mongoose-os.com/downloads/mos/install.sh | /bin/bash

如何安全卸载此软件？

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另一个问题是软件中心不显示卸载按钮，并保持安装状态。当我单击它时，我会收到一条消息，指出该软件包已安装。

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