[CentOS] environment-modules

mark m.roth at 5-cent.us
Sat Dec 26 03:21:38 UTC 2009

xiaoyunpeng wrote:
> I think you should give the user a path list of javas you've installed. More
> step on, a script with a "sun-java" or "openjdk" as input for switching the
> java type would be better.

Ok, so I guess no one's ever used environment-modules. Thanks anyway.

> On Sat, Dec 26, 2009 at 12:41 AM, Les Mikesell <lesmikesell at gmail.com>wrote:
>> m.roth at 5-cent.us wrote:
>>>> m.roth at 5-cent.us wrote:
>>>>> We've got a developer here who needs to use both java and openjdk. I
>> was
>>>>> giving her sudo for alternatives, but my manager would prefer that I
>>>>> look into environment-modules. I've installed it, and I see it comes
>> with
>>>>> configurations for cvs and info... but nothing for java, and the man
>>>>> pages doesn't seem to offer info on creating one.
>>>>> Does anyone have a pointer to a howto, or maybe even a sample one?
>>>> install openjdk uia standard centos 5.x rpms, install Sun Java to
>>>> /usr/java/jdk-whatever via the Sun tarball.
>>> Already did that (btw, Sun doesn't give you a tarball, they give you a
>>> self-extracting .bin).
>>>> if you put /usr/java/jdk-whatever/bin first in the path, you'll be using
>>>> the Sun java.  if you take it out of the path, you will be using the
>>>> default distribution openjdk.
>>> I'm trying to provide a simple method for switching between the two, and
>> I
>>> don't have any guarantee that someone *other* than this developer, who
>>> seems knowledgeable, will have to do the same thing.
>>> I reiterate: does anyone have any examples for a modulefile for java?
>> You don't need to switch.  You can have as many java versions as you want
>> installed.  Just export JAVA_HOME pointing to the one you want and either
>> put
>> the location of the binary you want first in PATH or give the full path in
>> the
>> command to start up.  Anyone who works with java will already know this.
>>  It is
>>  rpm that has a problem dealing with multiple versions of things running
>> concurrently.
>> --
>>    Les Mikesell
>>     lesmikesell at gmail.com
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