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Old 05-06-2011, 09:36 AM   #1
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Registered: Jul 2010
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permission's issue

hey there,

I have been using Ubuntu for a year now. I am all happy with it, but Ubuntu 11.04 messed some things.

I am a student of Java, and use it every day. whereas it worked fine before, since my recent upgrade, compiling files works just fine, but running them won't work fine. instead of running java files with just a 'java FileName', now I need to add a sudo as follows: 'sudo java FileName'. is there any way I can make sure my computer runs java files without requesting the sudo command? how do I go about that?
Old 05-06-2011, 11:10 AM   #2
Registered: Aug 2010
Location: Beaverton, Oregon, USA
Distribution: Pfsense, Ubuntu, Centos, Fedora, Redhat, Scientfic, MacOS
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Look at the permissions of the java binary, and make sure the read and execute bits are set. However, you will need to trace a couple of symlinks.

In my case I do the following:
ls -l `which java`
lrwxrwxrwx 1 root root 22 May 3 12:16 /usr/bin/java -> /etc/alternatives/java

ls -l /etc/alternatives/java
lrwxrwxrwx 1 root root 36 May 3 12:16 /etc/alternatives/java -> /usr/lib/jvm/java-6-sun/jre/bin/java

ls -l /usr/lib/jvm/java-6-sun/jre/bin/java
-rwxr-xr-x 1 root root 50794 Feb 2 17:25 /usr/lib/jvm/java-6-sun/jre/bin/java
Note that in my case, the read/execute bits are set for user, group, and other. If you are missing the "other" bits, you will be forced to use sudo. Remember that to execute a file, you must be able to read it: thus the read and execute bits. In my system's case, I would use the following command:

sudo chmod a+rw /usr/lib/jvm/java-6-sun/jre/bin/java
I like the wikipedia entry for the chmod command.

I hope that helps...

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