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When I run bin/, it displays, "Neither the JAVA_HOME nor the JRE_HOME environment variable is defined." Both of these env variables are set. Despite this, I looked into the file bin/, where that error message originates. At line 32, it executes which java 2>/dev/null in order to try to find the java home directory on its own. From within the script (which I have confirmed by echoing that command's return value), that returns a blank. However, when I run that command from outside the shell script, it accurately gives me the location of the java executable.

I have also echoed the value of $JAVA_HOME and $JRE_HOME, both of which have their appropriate values, but from within the script they appear to be empty. I can't figure out why this is happening. Any ideas?

2 answers

1 accepted

2 votes
Answer accepted

Make sure you define JAVA_HOME in ~/.bashrc . Anyway there is a workaround, create and execute a script like bellow



Thanks for the reply, Tam. JAVA_HOME is already defined appropriately in /etc/bashrc and it has the proper value immediately upon login.

Your workaround worked wonders though! I have no idea why that worked, but thank you. :)

You are welcome!.

The problem here is the difference between /etc/profile and /etc/bashrc, they are similar but /etc/profile is used for login shells and /etc/bashrc is used for non-login shells. I guess you execute by login user (maybe root) so it loads /etc/profile not /etc/bashrc. Define JAVA_HOME in /etc/profile then try to run again, let me know if this works for you.


Hey Tam, sorry I forgot to come back and let you know how it went. I defined JAVA_HOME in /etc/profile as well as /etc/bashrc (no point in removing that one, I feel) and stopped using the wrapper script workaround, and everything worked fine.

I didn't realize that about the difference between /etc/bashrc and /etc/profile, but now I know! Thanks a ton, this is definitely going to be an influential contribution of yours to my knowledge of Linux.

For anyone else that stumbles upon this because they renamed the install folder after an upgrade or a server migration. Getting old referencees to JRE_HOME? It's in <install>/bin/

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