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davmail 和 JAVA 手動安裝

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davmail 和 JAVA 手動安裝

我正在嘗試安裝 davmail，
我已經手動安裝了 JAVA（tar.gz 檔案）。嘗試後ppa：webupd8團隊回購並沒有取得好的結果。不得不清理很多文件包等等。
無論如何，當嘗試安裝 davmail 時，我收到此錯誤

$ sudo dpkg -i davmail_4.4.1-2225-1_all.deb
Selecting previously unselected package davmail.
(Reading database ... 174785 files and directories currently installed.)
Preparing to unpack davmail_4.4.1-2225-1_all.deb ...
Unpacking davmail (4.4.1-2225-1) ...
dpkg: dependency problems prevent configuration of davmail:
 davmail depends on openjdk-7-jre | openjdk-6-jre | oracle-java7-jre | sun-java6-jre; however:
  Package openjdk-7-jre is not installed.
  Package openjdk-6-jre is not installed.
  Package oracle-java7-jre is not installed.
  Package sun-java6-jre is not installed.

dpkg: error processing package davmail (--install):
 dependency problems - leaving unconfigured
Processing triggers for gnome-menus (3.10.1-0ubuntu2) ...
Processing triggers for desktop-file-utils (0.22-1ubuntu1) ...
Processing triggers for bamfdaemon (0.5.1+14.04.20140409-0ubuntu1) ...
Rebuilding /usr/share/applications/bamf-2.index...
Processing triggers for mime-support (3.54ubuntu1) ...
Errors were encountered while processing:
 davmail

並且JAVA配置完畢

$ java -version 
java version "1.7.0_55"
Java(TM) SE Runtime Environment (build 1.7.0_55-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.55-b03, mixed mode)

$ javac -version
javac 1.7.0_55

$ which java
/usr/bin/java

$ echo $JAVA_HOME
/opt/java/jdk1.7.0_55/

有沒有辦法告訴davmail我們已經安裝了JAVA？
或是解決這個問題的方法？

update-alternatives 選項也已配置。

$ update-alternatives --list java
/opt/java/jdk1.7.0_55/bin/java

$ update-alternatives --display java
java - auto mode
  link currently points to /opt/java/jdk1.7.0_55/bin/java
/opt/java/jdk1.7.0_55/bin/java - priority 100
Current 'best' version is '/opt/java/jdk1.7.0_55/bin/java'.

$ update-alternatives --config java
There is only one alternative in link group java (providing /usr/bin/java): /opt/java/jdk1.7.0_55/bin/java
Nothing to configure.

答案1

這是一個快速但骯髒的解決方案，但您可以告訴dpkg不要使用該--force-depends選項檢查依賴項是否已安裝。

# This will install davmail regardless of of whether or not its dependencies
# are installed
sudo dpkg -i --force-depends davmail_4.4.1-2225-1_all.deb

請注意，線上說明頁中有此選項的警告：

   --force-things, --no-force-things, --refuse-things

          Force  or  refuse  (no-force and refuse mean the same thing) 
          to do some things. things is a comma separated list of
          things specified below. --force-help displays a message
          describing them.  Things marked  with  (*)  are  forced  by
          default.

          Warning: These options are mostly intended to be used by 
          experts only. Using them without fully understanding their
          effects may break your whole system.

          [...]
          depends: Turn all dependency problems into warnings.

儘管沒有必要解決您眼前的問題，但請注意，在手動安裝 Java 時，如果您的目標是安裝“官方”Java 的 Oracle 發行版，您應該使用make-jpkg將 Oracletar.gz存檔轉換為 .deb 套件（請參閱此Debian 維基頁面了解更多） ：

make-jpkg jre-7u55-linux-x64.tar.gz
sudo dpkg -i oracle-java7-jre_7u55_amd64.deb

這允許 Java 包向Debian 替代系統讓系統知道您已經安裝了 Java 環境，並避免在安裝依賴 Java 的套件時出現依賴問題。

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