安装LibrePlan时遇到的问题

Question

我试图在Ubuntu18.04上安装LibrePlan，说明说我应该运行

sudo add-apt-repository ppa:libreplan/ppa
sudo apt-get update
sudo apt-get install libreplan 

但在第一个命令中，我得到了这样的信息：

LibrePlan (aka NavalPlan) is a free software web application for     
project management. It is written in Java and licensed under 
AGPLlicense.
More info: https://launchpad.net/~libreplan/+archive/ubuntu/ppa
Press [ENTER] to continue or Ctrl-c to cancel adding it.
Hit:1 http://bg.archive.ubuntu.com/ubuntu bionic InRelease
Get:2 http://bg.archive.ubuntu.com/ubuntu bionic-updates InRelease  [88,7 kB]
Ign:3 http://ppa.launchpad.net/libreplan/ppa/ubuntu bionic InRelease           
Get:4 http://bg.archive.ubuntu.com/ubuntu bionic-backports InRelease [74,6 kB] 
Err:5 http://ppa.launchpad.net/libreplan/ppa/ubuntu bionic Release             
404  Not Found [IP: 91.189.95.83 80]
Get:6 http://security.ubuntu.com/ubuntu bionic-security InRelease [83,2 kB]    
Get:7 http://bg.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages [290 kB]
Get:8 http://bg.archive.ubuntu.com/ubuntu bionic-updates/main i386 Packages [262 kB]
Get:9 http://bg.archive.ubuntu.com/ubuntu bionic-updates/main amd64 DEP-11 Metadata [138 kB]
Get:10 http://bg.archive.ubuntu.com/ubuntu bionic-updates/main DEP-11 48x48 Icons [27,5 kB]
Get:11 http://bg.archive.ubuntu.com/ubuntu bionic-updates/main DEP-11 64x64 Icons [53,7 kB]
Get:12 http://bg.archive.ubuntu.com/ubuntu bionic-updates/universe i386 Packages [161 kB]
Get:13 http://bg.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 Packages [161 kB]
Get:14 http://bg.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 DEP-11 Metadata [152 kB]
Get:15 http://bg.archive.ubuntu.com/ubuntu bionic-updates/universe DEP-11 48x48 Icons [153 kB]
Get:16 http://bg.archive.ubuntu.com/ubuntu bionic-updates/universe DEP-11 64x64 Icons [265 kB]
Get:17 http://bg.archive.ubuntu.com/ubuntu bionic-updates/multiverse amd64 DEP-11 Metadata [2468 B]
Get:18 http://bg.archive.ubuntu.com/ubuntu bionic-backports/universe amd64 DEP-11 Metadata [5096 B]
Get:19 http://security.ubuntu.com/ubuntu bionic-security/main amd64 DEP-11 Metadata [204 B]
Get:20 http://security.ubuntu.com/ubuntu bionic-security/universe amd64 DEP-11 Metadata [5788 B]
Reading package lists... Done               
E: The repository 'http://ppa.launchpad.net/libreplan/ppa/ubuntu bionic Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

我看到url http://ppa.launchpad.net/libreplan/ppa/ubuntu指向一个包含"dists“的存储库，其中不包含仿生文件夹，这是问题所在吗？简单地说，Ubuntu18.04的包还没有准备好(如果我正确地使用了这个词)？

此外，我尝试用sudo apt-key add key.txt添加键D4，但是出现了以下错误，gpg: no valid OpenPGP data found.，键位于https://launchpad.net/~libreplan

Answer 1

通过将Ubuntu附加步骤添加到原来的指南中，使其同时在some 18.04和20.04上工作：

安装要求：

apt-get install git-core maven openjdk-8-jdk postgresql postgresql-client python-docutils make gettext cutycapt

Set默认JDK：

update-java-alternatives -s java-1.8.0-openjdk-amd64

连接到数据库：

su postgres -c psql

使用SQL语句：

CREATE DATABASE libreplandev;
CREATE DATABASE libreplandevtest;
CREATE USER libreplan WITH PASSWORD 'libreplan';
GRANT ALL PRIVILEGES ON DATABASE libreplandev TO libreplan;
GRANT ALL PRIVILEGES ON DATABASE libreplandevtest TO libreplan;

下载源代码：

git clone git://github.com/LibrePlan/libreplan.git

Add缺少libreplan/libreplan末尾的依赖项-webapp/pu.xml：

    org.olap4j
    olap4j
    1.2.0

编译项目but跳过测试：

cd libreplan/
mvn -DskipTests clean install

发射应用程序：

cd libreplan-webapp/
mvn jetty:run

转到http://localhost:8080/