Installing Xvfb on Z/OS for SAP

[Former Member]

Hi,

Can anybody tell me the command to install and configure Xvfb for Z/os on SAP.

Actually we are trying to develop some java application for which Xvfb need to be installed on Linux box and we have Z/Os linux mainfram.

I have already downloaded the RPM and extraced under /usr/bin

now whn i say "install Xvfb" it gives error like cannot execute binary file.

Can anybody give me details, how can i go for this ???

Regards

[markus_doehr2 · Accepted solution]

> I have already downloaded the RPM and extraced under /usr/bin

> now whn i say "install Xvfb" it gives error like cannot execute binary file.

rpm files are usually installed using "rpm -i <filename>.rpm".

Markus

[Former Member · Accepted solution]

Hi,

Even after RPM -i i was not able to start Xvfb.

Then I downloaded it from site, unziped and got Xvfb. As per the nites I need to type command like ./extract -C Xvfb but it says no file or folder ./extract then I tried to install Xvfb or simple Xvfb it says unable to ececute binary.

[markus_doehr2 · Accepted solution]

> Then I downloaded it from site, unziped and got Xvfb. As per the nites I need to type command like ./extract -C Xvfb but it says no file or folder ./extract then I tried to install Xvfb or simple Xvfb it says unable to ececute binary

are you sure you downloaded the binary for the correct platform?

What's the output of

file `which Xvfb`

Markus

[Former Member · Accepted solution]

the output is as -

/usr/X11R6/bin # file which Xvfb

which: cannot open `which' (No such file or directory)

Xvfb: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.2.5, dynamically linked (uses shared libs), for GNU/Linux 2.2.5, not stripped

[markus_doehr2 · Accepted solution]

> /usr/X11R6/bin # file which Xvfb

> which: cannot open `which' (No such file or directory)

> Xvfb: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.2.5, dynamically linked (uses shared libs), for GNU/Linux 2.2.5, not stripped

This explains the problem clearly.

You're trying to execute an Intel 32bit binary on a zLinux (S390x) host. This can't work.

The RPM must be build for the platform that you see when you execute

uname -i

Markus

[Former Member · Accepted solution]

Plz chk this -

:/usr/X11R6/bin # file Xvfb

Xvfb: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.2.5, dynamically linked (uses shared libs), for GNU/Linux 2.2.5, not stripped

:/usr/X11R6/bin # ls -l

total 3475

-rwxrwxrwx 1 root root 3507872 Jan 20 2002 Xvfb

lrwxrwxrwx 1 root root 7 Aug 14 2009 sux -> /bin/su

-rwxr-xr-x 1 root root 41784 Apr 22 2008 xauth

/usr/X11R6/bin # echo $shell

:/usr/X11R6/bin # id

uid=0(root) gid=0(root) groups=0(root),1000(sapinst)

/usr/X11R6/bin # uname -a

Linux sp1as1 2.6.16.60-0.21-default #1 SMP Tue May 6 12:41:02 UTC 2008 s390x s390x s390x GNU/Linu

[markus_doehr2 · Accepted solution]

You see the difference between:

Xvfb: ELF 32-bit LSB executable, Intel 80386

and

Linux sp1as1 2.6.16.60-0.21-default #1 SMP Tue May 6 12:41:02 UTC 2008 *s390x s390x s390x* GNU/Linux

?

You need to download Xvfb for the proper architecture/processor which is in your case s390x - not for Intel.

Markus

[Former Member · Accepted solution]

can i download it frm this site -

http://www.linuxbase.org/download/

[markus_doehr2 · Accepted solution]

Any reason why you don't use the official packages provided by your vendor (Novell/suse)?

Markus

[Former Member · Accepted solution]

Im trying onthis site -

http://en.opensuse.org/

is it right or is ther any other site fr this ???

plz guide

[markus_doehr2 · Accepted solution]

Do the following:

- open yast2 (as user 'root')

- Select Software - *Online Update Configuration *

- register your system @ Novell

- after the use in yast2 "Software management" to download the correct package

Markus

[Former Member · Accepted solution]

its giving belwo result -

YaST @ sp1as1 Press F1 for Help

[Filterv] [Actionsv] [Informationv] [Etc.v]

┌───────────────────────────────────────────────────────────────────────────────────────────────┐

│ │Name │Summary│Kind│Version │

│ │No patches available │

│ │

│ │

│ │

│ │

│ │

│ │

└───────────────────────────────────────────────────────────────────────────────────────────────┘

Filter: Installable Patches Total Download Size: 0 B

┌───────────────────────────────────────────────────────────────────────────────────────────────┐

│ │

│ │

│ │

│ │

│ │

│ │

└───────────────────────────────────────────────────────────────────────────────────────────────┘

[Help] [Cancel] [OK]

[markus_doehr2 · Accepted solution]

> its giving belwo result -

Seems your system is not properly registered @ novell. Did you enter an activation number?

Markus

[Former Member · Accepted solution]

I thinkk yes its registed properly.

Is there any other site where i can download it from and install without any problem ???

Regards

[markus_doehr2 · Accepted solution]

> Is there any other site where i can download it from and install without any problem ???

According to what I found on the Novell site, the Xvfb is part of the Xfree/Xorg package and is available on the first installation DVD.

(For SLES 10 SP2 it's https://secure-www.novell.com/products/linuxpackages/server10/sp2/s390x/xorg-x11-xvfb.html, you seem to run SLES11.)

Check your DVDs.

Markus

[Former Member · Accepted solution]

Hi ,

some how i installed xvfb. plz see belwo -

:/var/lib/rpm # rpm -qa | grep xvf

lsb-xvfb-1.2.0-2

now whn i run ps -ef | grep xvb

i dont get any service runnning

[markus_doehr2 · Accepted solution]

> lsb-xvfb-1.2.0-2

You seem to have

- install an ancient version (lsb-xvfb is from 2005) on a brand new operating system (SuSE SLES 11 for z/OS)

--> it's clear that it doesn't work

I can just again suggest to check the source DVDs from where you installed, the file you need is there on the DVDs - or contact Novell if you don't find it.

Avoid installing random packages that are found by google. They are not going to work.

Markus

[Former Member · Accepted solution]

how do we start and stop Xvfb on linux box ???

and chk Xvfb status ???

[Former Member · Accepted solution]

Now whn i say

ps -ef | grep X11

it shows the X11 is running .

but whn I say

ps -ef | grep Xvfb

it shows no process running.

Will it be ok or Xvbf also need to be running too ????

[markus_doehr2 · Accepted solution]

> Will it be ok or Xvbf also need to be running too ????

Xvfb is used to emulate a framebuffer/screen. If X can be started there's not need to use Xvfb.

Markus

[Former Member · Accepted solution]

Full marks to you Markus.....I hope to giv you point more thn 10 if possible !!!

Many Thanks & Regards

[Former Member]

Hi Markus,

Right after installation it worked but after restart its not working. whereas X11 is still running.

ps -ef | grep X11

root 1959 1 0 Jul03 ? 00:00:00 /usr/X11R6/bin/xdm

Edited by: basis basis on Jul 7, 2010 4:14 AM

[markus_doehr2]

- Which package did you finally install? The SuSE/Novell package from the DVD?

- What exactly "is not working"? What error message do you get - if any?

Markus

[Former Member]

We are trying to run on java application which should generated pop up window on clincking submit button.

but its generating folowing error-

java.lang.NoClassDefFoundError: sun/awt/X11GraphicsEnvironment

we already set the parameter -

java.awt.headless=true

but it was not working. then we installed X11 pacakage from installation DVD (as suggested by you)and it got working also but after restart it again throwing same error. where as X11 is still running.

Thanks

[markus_doehr2]

What is the Java version you use? Execute as user <sid>adm

java -version

Markus

[Former Member]

java -version

java version "1.4.2"

Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2)

Classic VM (build 1.4.2, J2RE 1.4.2 IBM build cxz64142-20080122 (SR10) (JIT enabled: jitc))

On top of this Xvfb is also running.

Regards

Edited by: basis basis on Jul 8, 2010 12:09 AM

[Former Member]

Now I installed Xvfb also frm OS DVD -

ps -ef | grep Xv

10805 6597 0 17:28 pts/1 00:00:00 Xvfb :1 -screen 0 1x1x24

but than also same error mesg