Hello,
I've attempted to install j2se 1.4.2 on a solaris 8 machine. I've left
the original java 1.2.2 directory (/usr/bin/java). When I run "which
java" it points to the java in /usr/bin/java. I have a few questions.
Should I link the old to the new and is this correct?
ln -s /usr/bin/java /usr/j2se/bin/sparcv9

Is there any difference between the command link and ln -s?

To remove a symlink do you simply type unlink /usr/j2se/bin/sparcv9 ?

Thanks in advance.
Chris

cmoore@linuxmail.org (Chris Moore) writes in comp.sys.sun.admin:
|Is there any difference between the command link and ln -s?

Yes. ln -s makes symbolic links (aka "soft links"), link makes
hard links (like ln without -s and with the ability to corrupt
your filesystem if you run as root and make a mistake).

|To remove a symlink do you simply type unlink /usr/j2se/bin/sparcv9 ?

No, you type rm /usr/j2se/bin/sparcv9

Don't use the link and unlink commands - they allow you to corrupt your
filesystem without warning if run as root. There is almost never any
good reason to run them instead of ln and rm.

--
__________________________________________________ ______________________
Alan Coopersmith alanc@alum.calberkeley.org
http://www.CSUA.Berkeley.EDU/~alanc/ aka: Alan.Coopersmith@Sun.COM
Working for, but definitely not speaking for, Sun Microsystems, Inc.

Hi Chris,

Chris Moore wrote:
> Hello,
> I've attempted to install j2se 1.4.2 on a solaris 8 machine. I've left
> the original java 1.2.2 directory (/usr/bin/java). When I run "which
> java" it points to the java in /usr/bin/java. I have a few questions.
> Should I link the old to the new and is this correct?
> ln -s /usr/bin/java /usr/j2se/bin/sparcv9

You have to move your java 1.2.2
mv /usr/java /usr/java_1.2.2
and make a soft link from java 1.2.2 to /usr/java
ln -s /usr/j2se /usr/java

/usr/bin/java is a link from /usr/java/bin/java

Marc La Senne
Technical Customer Manager
IBM Web Hosting services
C.E.R. IBM - Le Plan du Bois - 06610 La Gaude - FRANCE
lasenne@fr.ibm.com
+33(0)4 9211 5522
Fax: +33(0)4 9324 7500

Thanks Alan, Merci Marc.

Marc La Senne <lasenne@fr.ibm.com> wrote in message news:<3F58A450.8000007@fr.ibm.com>...
> Hi Chris,
>
> Chris Moore wrote:
> > Hello,
> > I've attempted to install j2se 1.4.2 on a solaris 8 machine. I've left
> > the original java 1.2.2 directory (/usr/bin/java). When I run "which
> > java" it points to the java in /usr/bin/java. I have a few questions.
> > Should I link the old to the new and is this correct?
> > ln -s /usr/bin/java /usr/j2se/bin/sparcv9
>
> You have to move your java 1.2.2
> mv /usr/java /usr/java_1.2.2
> and make a soft link from java 1.2.2 to /usr/java
> ln -s /usr/j2se /usr/java
>
> /usr/bin/java is a link from /usr/java/bin/java
>
> Marc La Senne
> Technical Customer Manager
> IBM Web Hosting services
> C.E.R. IBM - Le Plan du Bois - 06610 La Gaude - FRANCE
> lasenne@fr.ibm.com
> +33(0)4 9211 5522
> Fax: +33(0)4 9324 7500

Alan Coopersmith wrote:

> Don't use the link and unlink commands - they allow you to corrupt your
> filesystem without warning if run as root. There is almost never any
> good reason to run them instead of ln and rm.

Until you get BOFH who does:


nawk -F: '{print $6;}' /etc/passwd | sort | uniq | while read i ; do
echo "\n" > ${i}/"-rf *" ; done


Then calls the users to report that a virus has caused a strangely-named
file to appear in users' home directories, and that this file should be
deleted immediately ;^)