我正在尝试安装最稳定、最无聊的 GIMP 版本，而不添加特殊存储库。我假设正确的方法是sudo apt install gimp。不幸的是，我收到以下警告：
WARNING: The following packages cannot be authenticated!
libbabl-0.1-0 libsdl1.2debian libamd2.4.1 libcamd2.4.1 libccolamd2.9.1
libcholmod3.0.6 libumfpack5.7.1 libgegl-0.3-0
这应该发生吗？我尝试运行
sudo apt-key update
sudo apt-get update
但问题并未得到解决。我该怎么办？
编辑：这是完整的输出sudo apt install gimp：
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
libmircommon5 linux-headers-4.4.0-78 linux-headers-4.4.0-78-generic
linux-headers-4.4.0-79 linux-headers-4.4.0-79-generic
linux-image-4.4.0-78-generic linux-image-4.4.0-79-generic
linux-image-extra-4.4.0-78-generic linux-image-extra-4.4.0-79-generic
linux-signed-image-4.4.0-78-generic linux-signed-image-4.4.0-79-generic
linux-tools-4.4.0-78 linux-tools-4.4.0-78-generic linux-tools-4.4.0-79
linux-tools-4.4.0-79-generic
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
gimp-data libamd2.4.1 libbabl-0.1-0 libcamd2.4.1 libccolamd2.9.1
libcholmod3.0.6 libgegl-0.3-0 libgimp2.0 libsdl1.2debian libumfpack5.7.1
Suggested packages:
gimp-help-en | gimp-help gimp-data-extras
The following NEW packages will be installed:
gimp gimp-data libamd2.4.1 libbabl-0.1-0 libcamd2.4.1 libccolamd2.9.1
libcholmod3.0.6 libgegl-0.3-0 libgimp2.0 libsdl1.2debian libumfpack5.7.1
0 upgraded, 11 newly installed, 0 to remove and 0 not upgraded.
Need to get 14.0 MB of archives.
After this operation, 79.8 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
WARNING: The following packages cannot be authenticated!
libbabl-0.1-0 libsdl1.2debian libamd2.4.1 libcamd2.4.1 libccolamd2.9.1
libcholmod3.0.6 libumfpack5.7.1 libgegl-0.3-0
Install these packages without verification? [y/N] n
E: Some packages could not be authenticated
编辑：我不认为这个问题与审阅者提出的任何问题重复：
- 为什么我会收到来自 Ubuntu 存储库的软件包的身份验证错误？这些答案都不适合我。
- W：GPG 错误和警告：无法验证以下包！没有适合我的答案。
- 由于“哈希值不匹配”错误，无法下载软件包列表这不是我最初遇到的错误。