Comments on: Installing Sun’s Java on CentOS 5.2

By: julia

julia — Thu, 04 Mar 2010 04:55:01 +0000

hello julia here…….microsoft certificateI’m not very smart on installing packages on Linux, but today I need to configure a Tomcat on a CentOS 5.2. The CentOS 5.2 has Tomcat 5 available as yum package, with gcc-java. But Java gurus tell me to use the original Sun JDK to run Tomcat without problems. I know that Tomcat can run with a JRE which is a lot smaller, so I started with download the Java JRE 6 Update 11 from here. I choosed Linux/Multilanguage and accepted the Sun Terms. I downloaded the jre-6u11-linux-i586.bin file wich is an autoinstaller for Linux. After uploading the file in the /root dir, I did a chmod to make the file executable: chmod u+x jre-6u11-linux-i586.bin and then ran it

./jre-6u11-linux-i586.bin

By: Martin

Martin — Thu, 11 Feb 2010 15:08:32 +0000

is step 1 just to determine the URL? why would you need to download it twice? first time in step 1 and then in step 2 with wget. what am i missing?

By: Barry Wadsworth

Barry Wadsworth — Mon, 01 Feb 2010 04:42:13 +0000

Thanks for you help! I’ve successfully installed jdk1.6.0_18 on CentOS 5.4!

Here are a few notes that may help others:

When I did wget the file name had the url prepended to it. I was able to rename it by putting double quotes around it.

When I did the alternatives command, it isn’t recognized. I exited and used su – instead of su root, then it recognized the alternatives command.

By: Ilyse Kazar

Ilyse Kazar — Mon, 03 Aug 2009 11:34:49 +0000

Well i gave your instructions a Profoundly Newb Test, since i am only a consultant who does largely PM and is trying to install scrumworks pro which needs java on my web server. CentOS 5.2.

Here are my notes, from the perspective, then, of someone whom it is safe to presume does NOT have lots of experience doing this sort of thing.

1. the wget command worked for my selected version but the file that was saved had the same long name as everything after the final slash in that superlong URL.

IOW the filename also included everything after the ? in the URL (perhaps since i’d read bad things about 6_14 and therefore poked around on Sun’s site to find 6_13). I guess because the filename had all sorts of strange characters in it (% for example) I could not figure out how to use the mv command to change it to its basic jdk-6u13-linux-i586-rpm.bin format … so I went thru my ftp client (Cyberduck) that makes renaming stuff on my web server handy.

2. THIS INSTRUCTION NEEDS … WELL … MORE INSTRUCTION:

Step (3) : Setup the alternatives correctly
[user@www]# alternatives –install /usr/bin/java java /opt/jdk1.6.0_07/bin/java 2

Where does that string come from?? I used it (replacing the _07 with _13 for the version I’d dl’d) but felt very unsure whether it actually did anything. For the instructions to be valid beyond the particular 6_07 version you installed as an example, can you tell us how, after completing steps 1 and 2, one knows exactly what string to put after /opt/ in the above command? thanks

3. SADLY MY INSTALL FAILED:
[/opt]# java -version
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.

thanks anyway. it’s always scary and fun to do stuff to my web server

“

By: Paras Pradhan

Paras Pradhan — Tue, 14 Jul 2009 14:54:31 +0000

Nice short article. Thanks halikaon as well. Did work in centos 5.3 as well.

Paras.

By: RRaph

RRaph — Wed, 01 Jul 2009 14:47:15 +0000

Very good tutorial.
Dallas’s alternative is working too.
Many thanks.

By: fledermaus

fledermaus — Thu, 11 Jun 2009 07:30:53 +0000

Hi, I tried to install java following your tutorial. Everything worked like a charm, I mean, no errors.

But when I do the test typing java -version it says: bash – command not found…

I will try to look up how to set the classpath thingy… So far, no luck…

By: Grey

Grey — Thu, 14 May 2009 05:23:39 +0000

Thanks! it works

By: Alex

Alex — Wed, 13 May 2009 15:11:22 +0000

Thank you very much! This tutorial saves my day.

By: Samir

Samir — Tue, 05 May 2009 16:06:36 +0000

Thanks for the tutorial, it was very helpful for me.