JAVA_HOME and PATH environment variable not working in UBUNTU

Question

I have downloaded jdk-7u9-linux-i586.rpm from oracle. Then I installed it in my Ubuntu 12.04 LTS. Then I set the environment path as :

 export JAVA_HOME=/usr/java/<the jdk directory I cant recall now>
 export PATH={$PATH}:{$JAVA_HOME}/bin

Then I checked by echo $PATH and echo $JAVA_HOME. Now it is showing correct paths.

BUT THE PROBLEM IS : IF I TRY java IN THE CONSOLE IT IS SHOWING UNRECOGNIZED COMMAND ERROR.

Please help me.

Sorry, it it usr/java/<java directory>/bin. and it is there for sure, I have checked. — Aryasindhu Sahu
– Aryasindhu Sahu, Commented Nov 19, 2012 at 14:10
shouting wouldn't get you answers any faster than they usually do. — Nishant
– Nishant, Commented Nov 19, 2012 at 14:11
try: export PATH=$PATH:$JAVA_HOME/bin but before that try $JAVA_HOME/bin/java -version — Nishant
– Nishant, Commented Nov 19, 2012 at 14:12
It will help you !! cyberciti.biz/faq/linux-unix-set-java_home-path-variable — Pratik
– Pratik, Commented Nov 19, 2012 at 14:13

Brian Agnew · Accepted Answer · 2012-11-19 14:14:02Z

2

You changed your PATH, but did you re-source and refresh your PATH cache ? (see here for more details, and check section 3)

e.g.

$ vi ~/.profile
$ . ~/.profile
$ echo $PATH # is this right ?

and a possible hash

$ hash

answered Nov 19, 2012 at 14:14

Brian Agnew

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1 Comment

Aryasindhu Sahu Over a year ago

Everytime I echo $PATH, I get the path to my jdk's bin directory. But "java" does not work directly.

kostja · Accepted Answer · 2012-11-19 14:46:36Z

1

If you simply call export in a shell, you will set the variables exactly for this one environment. If you want those variables to be there for all shell environments, add them to your ~/.bashrc or your ~/.profile files.

EDIT: I think, using a RedHat-specific packages (.rpm) on Ubuntu may be a cause of your issue - this is a rather wild guess though. You could either remove your current installation and try a different package, or better yet, install java using your regular packgage manager:

sudo add-apt-repository ppa:webupd8team/java 
apt-get update 
sudo apt-get install oracle-java7-installer

edited Nov 19, 2012 at 14:46

answered Nov 19, 2012 at 14:14

kostja

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3 Comments

Aryasindhu Sahu Over a year ago

I get the actual path to the bin directory of jdk if I echo $PATH. But the executable does not work directly, works only if I specify the full path. Ex. : /usr/java/<jdk path>/bin/java

kostja Over a year ago

@AryasindhuSahu this is very strange. I cannot image how this could happen. As you seem to have double-checked the path in question, I would reinstall the JDK using a regular package manager and try again.

Aryasindhu Sahu Over a year ago

I could have installed it from console also, but I needed a copy of the jdk for future requirements. So I downloaded that.

Aryasindhu Sahu · Accepted Answer · 2012-11-20 13:19:02Z

0

Finally I got it.
It was all my mistake. I have set the PATH variable in the /etc/environment file and it was set wrongly. I set it upto jdk folder and not /bin after that.

After changing it to bin, I logged out and logged in again.
Now it is working fine.

Sorry guys for wasting your time and efforts.

answered Nov 20, 2012 at 13:19

Aryasindhu Sahu

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