如何在 Linux shell 脚本中确定和使用实际的 java 路径
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How to determine and use the actual java path in a Linux shell script
提问by MountainX
In a bash shell script on Ubuntu/Mint, I need to create some symlinks in the /jre/lib/ext/ directory under the java installation directory.
在 Ubuntu/Mint 上的 bash shell 脚本中,我需要在 java 安装目录下的 /jre/lib/ext/ 目录中创建一些符号链接。
For example, if openjdk6 is the default java, /usr/bin/java points to:
例如,如果 openjdk6 是默认的 java,则 /usr/bin/java 指向:
/usr/lib/jvm/java-6-openjdk/jre/bin/java
I can find this in my script with:
我可以在我的脚本中找到它:
MYJAVAPATH=readlink -f `which java`
The path I would need in my shell script would be based on part of that path, plus the path fragment above:
我在 shell 脚本中需要的路径将基于该路径的一部分,加上上面的路径片段:
/usr/lib/jvm/java-6-openjdk/jre/lib/ext/
Can anyone tell me to to derive the path immediately above in a bash shell script? Thanks.
谁能告诉我在 bash shell 脚本中直接导出路径?谢谢。
采纳答案by Adam Zalcman
You can simply append the relative part ../lib/ext/
您可以简单地附加相关部分 ../lib/ext/
MYJAVAPATH="$(readlink -f $(which java))"
LIB_EXT="$(dirname ${MYJAVAPATH})/../lib/ext"
and then use ${LIB_EXT}
.
然后使用${LIB_EXT}
.
回答by Michael Ridley
You could use dirname
such as
你可以使用dirname
诸如
javalink=`which java` javapath=`readlink $javalink` javadir=`dirname $javapath`