我最近尝试在我的 Debian 10 VPS 上安装 snapd，当我遇到以下错误时：
Setting up jdk1.8 (1.8.0271-1) ...
Unpacking JAR files...
tools.jar...
Error: Could not open input file: /usr/java/jdk1.8.0_271-amd64/lib/tools.pack
plugin.jar...
Error: Could not open input file: /usr/java/jdk1.8.0_271-amd64/jre/lib/plugin.pack
javaws.jar...
Error: Could not open input file: /usr/java/jdk1.8.0_271-amd64/jre/lib/javaws.pack
deploy.jar...
Error: Could not open input file: /usr/java/jdk1.8.0_271-amd64/jre/lib/deploy.pack
rt.jar...
Error: Could not open input file: /usr/java/jdk1.8.0_271-amd64/jre/lib/rt.pack
jsse.jar...
Error: Could not open input file: /usr/java/jdk1.8.0_271-amd64/jre/lib/jsse.pack
charsets.jar...
Error: Could not open input file: /usr/java/jdk1.8.0_271-amd64/jre/lib/charsets.pack
localedata.jar...
Error: Could not open input file: /usr/java/jdk1.8.0_271-amd64/jre/lib/ext/localedata.pack
update-alternatives: error: alternative jar can't be slave of java: it is a master alternative
dpkg: error processing package jdk1.8 (--configure):
installed jdk1.8 package post-installation script subprocess returned error exit status 2
Errors were encountered while processing:
jdk1.8
E: Sub-process /usr/bin/dpkg returned an error code (1)
我的更新选项或 java 安装似乎有问题。我已经尝试搜索提示：alternative jar can't be slave of java: it is a master alternative
但我无法理解它。我已经尝试更新我的软件包，但这似乎也没有影响。
我将衷心感谢您的帮助。
答案1
解决方法：
alternative jar can't be slave of java: it is a master alternative
您需要将 java 添加到update-alternatives：
sudo update-alternatives --install "/usr/bin/java" "java" "/usr/java/jdk1.8.0_271-amd64/bin/java 100
sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/java/jdk1.8.0_271-amd64/bin/javac 100 \
--slave "/usr/bin/jar" "jar" "/usr/java/jdk1.8.0_271/bin/jar"
解决以下错误：
dpkg: error processing package jdk1.8 (--configure):
installed jdk1.8 package post-installation script subprocess returned error exit status 2
Errors were encountered while processing:
jdk1.8
E: Sub-process /usr/bin/dpkg returned an error code (1)