kolab提供错误提示安装指南

我正在尝试在我的ubuntu 16.04上安装kolab，但是在这里找到了指南，
但是在apt-get update思考的步骤上我遇到了错误，认为这没什么大不了，但是当我继续尝试以下命令来安装kolab时，也给出了错误

这是两个顺序：

root@pe-fw:~# apt-get update
Get:1 http://security.ubuntu.com/ubuntu xenial-security InRelease [107 kB]
Hit:2 http://nl.archive.ubuntu.com/ubuntu xenial InRelease
Hit:3 http://nl.archive.ubuntu.com/ubuntu xenial-updates InRelease
Hit:4 http://nl.archive.ubuntu.com/ubuntu xenial-backports InRelease
Ign:5 http://obs.kolabsys.com/repositories/Kolab:/16/Ubuntu_16.04 ./ InRelease
Get:6 http://obs.kolabsys.com/repositories/Kolab:/16/Ubuntu_16.04 ./ Release [993 B]
Get:7 http://obs.kolabsys.com/repositories/Kolab:/16/Ubuntu_16.04 ./ Release.gpg [827 B]
Ign:8 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial InRelease
Ign:9 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial Release
Ign:10 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main Sources
Ign:11 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main ppc64el Packages
Ign:12 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main amd64 Packages
Ign:13 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main i386 Packages
Ign:14 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main all Packages
Ign:15 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main Translation-en_US
Ign:7 http://obs.kolabsys.com/repositories/Kolab:/16/Ubuntu_16.04 ./ Release.gpg
Hit:16 http://obs.kolabsys.com/repositories/Kolab:/16/Ubuntu_16.04 ./ Sources
Hit:17 http://obs.kolabsys.com/repositories/Kolab:/16/Ubuntu_16.04 ./ Packages
Ign:18 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main Translation-en
Ign:10 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main Sources
Ign:11 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main ppc64el Packages
Ign:12 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main amd64 Packages
Ign:13 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main i386 Packages
Ign:14 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main all Packages
Ign:15 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main Translation-en_US
Ign:18 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main Translation-en
Ign:10 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main Sources
Ign:11 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main ppc64el Packages
Ign:12 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main amd64 Packages
Ign:13 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main i386 Packages
Ign:14 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main all Packages
Ign:15 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main Translation-en_US
Ign:18 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main Translation-en
Ign:10 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main Sources
Ign:11 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main ppc64el Packages
Ign:12 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main amd64 Packages
Ign:13 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main i386 Packages
Ign:14 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main all Packages
Ign:15 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main Translation-en_US
Ign:18 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main Translation-en
Ign:10 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main Sources
Ign:11 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main ppc64el Packages
Ign:12 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main amd64 Packages
Ign:13 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main i386 Packages
Ign:14 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main all Packages
Ign:15 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main Translation-en_US
Ign:18 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main Translation-en
Err:10 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main Sources
  404  Not Found
Ign:11 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main ppc64el Packages
Ign:12 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main amd64 Packages
Ign:13 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main i386 Packages
Ign:14 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main all Packages
Ign:15 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main Translation-en_US
Ign:18 http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial/main Translation-en
Fetched 109 kB in 4s (23.9 kB/s)
Reading package lists... Done
W: The repository 'http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu xenial Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: http://obs.kolabsys.com/repositories/Kolab:/16/Ubuntu_16.04 ./ Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A01D0CA80038D0DB
W: The repository 'http://obs.kolabsys.com/repositories/Kolab:/16/Ubuntu_16.04 ./ Release' is not signed.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch http://mirror.jmu.edu/pub/mariadb/repo/10.1/ubuntu/dists/xenial/main/source/Sources  404  Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
root@pe-fw:~# apt-get install kolab
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 kolab : Depends: kolab-imap but it is not going to be installed
         Depends: kolab-webclient but it is not going to be installed
         Depends: kolab-webadmin but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

apt这里有两个独立的问题：mariadb和kolab的存储库在您的配置中均已损坏。要安装MariaDB 10，您可以按照另一本指南进行操作，在该指南中，您仅需执行此步骤

sudo apt-get install software-properties-common
sudo apt-key adv --recv-keys --keyserver hkp://keyserver.ubuntu.com:80 0xF1656F24C74CD1D8
sudo add-apt-repository 'deb [arch=amd64,i386,ppc64el] http://ftp.utexas.edu/mariadb/repo/10.1/ubuntu xenial main

您会看到，它与您的指南非常相似。

kolab存储库中的错误是由更改发行密钥的开发人员引起的。有关更多信息，请参见此票证。可以使用以下命令进行修复：

wget -q -O- https://obs.kolabsys.com/repositories/Kolab:/16/Ubuntu_16.04/Release.key | sudo apt-key add -