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I am new to linux I have a Kali 2.0. I was trying to install jdk 8 on it. I couldn't do it via terminal. I downloaded the jdk package from Java website and extracted it using tar -xf to my home directory Added the directory containing javac to my path variable permanently. And I removed the existing Java 1.7 It said something like /usr/bin/javac missing. I guess I was feeling really stupid but I copied all the files from the jdk folder I downloaded onto /usr/bin/ and tried the javac command. This time it said some lib file wasn't found so I opened each folder from the jdk folder I downloaded and copied all the files and not the folders from each folder onto the /usr/bin/ directory. I have no idea what I did but now when I try to install the old jdk I had (using apt-get install openjdk-7-jdk) it gets installed but then when I try javac , I get the same message some lib file is missing. Could someone please tell me what I did to my system and how can I fix it?

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  • Did you remove the existing Java 1.7 package using apt-get?
    – Peschke
    Jun 8, 2016 at 19:02
  • Yes I did remove it. Jun 8, 2016 at 19:03
  • What happened when you tried installing JDK 8? I see openjdk-8 in their repositories. pkg.kali.org/pkg/openjdk-8
    – Peschke
    Jun 8, 2016 at 19:06
  • It said it didn't exist when I tried that command Jun 8, 2016 at 19:06
  • I tried apt-get install openjdk-8-jdk because that was the command for 1.7. and that worked so I thought the command for 8 would be similar. Jun 8, 2016 at 19:08

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I still have no idea on what effect adding extra files and replacing files at /usr/bin will do. I guess I'll have to wait and see whether applications will start to crash or not and repair them.

But here is the good news, I finally got the jdk8 installed. Since no other way was work for me.. I made a link to the javac file in the original file that I externally downloaded onto my home directory and placed this link in /usr/bin/ directory and renamed the link as javac and deleted the javac I copied onto the directory earlier. And guess what.. it worked.

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