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Full Discussion: Installing Java Problems
Top Forums UNIX for Dummies Questions & Answers Installing Java Problems Post 302503804 by yifangt on Friday 11th of March 2011 05:47:52 PM
Old 03-11-2011
similar question but for upgrade

I was trying to upgrade my java 1.6.0_20 to java 1.6.0_24 as a self-learning experience. Felt nervous and want to know the right way. Yes, I downloaded the file from SUN:
Code:
jre-6u24-linux-x64.bin

and executed it. It was successfully installed in my local folder
Code:
/Downloads/jre1.6.0_24/

But, when I check the version it still displayed the old version which is linked the java executable by two symlinks after I recursively checked each file (for simplicity I put them directly here):
Code:
$ java -version
java version "1.6.0_20"
$which java
/usr/bin/java---> /etc/alternatives/java--->/usr/lib/jvm/java-6-openjdk/jre/bin/java

Now, my question is: can I replace the old java executable with the new one, or simply replace the whole folder that contains the java executable? I am aware there some new files. Not sure the whole story while I am trying to understand the basics.
I am using Ubuntu 10.10 Maverick Meerkat - released in October 2010 amd64-server in linux kernel 2.6.35.27-server & gnome 2.32.0.
Please someone give me a explanation. Thanks a lot!

Yifang
 

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shells(4)							   File Formats 							 shells(4)

NAME
shells - shell database SYNOPSIS
/etc/shells DESCRIPTION
The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser- shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root. A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by the routines which search the file. Blank lines are also ignored. The following default shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/pfcsh, /bin/pfksh, /bin/pfsh, /bin/sh, /bin/tcsh, /bin/zsh, /sbin/jsh, /sbin/sh, /usr/bin/bash, /usr/bin/csh, /usr/bin/jsh, /usr/bin/ksh, /usr/bin/pfcsh, /usr/bin/pfksh, /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh. Note that /etc/shells overrides the default list. Invalid shells in /etc/shells may cause unexpected behavior (such as being unable to log in by way of ftp(1)). FILES
/etc/shells lists shells on system SEE ALSO
vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4) SunOS 5.10 4 Jun 2001 shells(4)
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