This is about an oracle application server running on RHEL platform(Linux prod.xyz.com 2.6.18-194.el5PAE #1 SMP Mon Mar 29 20:19:03 EDT 2010 i686 i686 i386 GNU/Linux). All of a sudden all the application services shut down abnormally on weekend. On the first day of the week, business users were unable to login as a result. For root cause investigation, we were unable to findout anything in the application logs. But were trying to get reboot/shutdown information from the system.....but we are bit confused with the info in /var/log/wtmp by using 'last' command(output given bellow):
[root@prod ~]# last reboot |head -2
reboot system boot 2.6.18-194.el5PA Mon Aug 8 11:26 (1+03:10)
reboot system boot 2.6.18-194.el5PA Sun Aug 7 17:27 (17:55)
We doubt the server might have gone down on Sunday(7th Aug) but there's also an entry of 8th Aug, on which day the server was running fine, no reboot/shutdown happened. If there any other way of getting info on reboot timings.
So I updated my software using Yast. One of the updates failed to install. I rebooted and then was in black screen hell with the following information:
Neither the variables MOUSEDEVICE and MOUSETYPE nor the variable GPM_PARAM is set in /etc/sysconfig/mouse Run 'yast mouse' to set up gpm Starting hpssd: Checking/updating CPU microcode unused Starting nfsboot (sm-notify) done done Loading keymap i386/qwert/uk.map.gz done Loading compose table winkeys shiftctrl latin1.add done Start Unicode mode done Starting hotkey-setup done [OK] Starting cupsd done Starting powersaved: ################################### # ACPI system but acpid not running. # # Start acpid first, then restart powersaved! # ############################################### skipped Mount SMB/ CIFS File Systems unused Executing suseRegister (looking for new update channels): skipped Starting SSH daemon done Starting ypbind.....................No domainname set skipped Starting service automounter ("files nis" does not provide any mounts) skipped Starting Firewall Initialization (phase 2 of 2) SuSEfirewallZ: Warning: ip6tables does not support state matching. Extended IPu6 support disabled. SuSEfirewallz: Warning: no interface active done Master Resource Control: runlevel 3 has been reached Skipped services in runlevel 3: nfs gpm microcode powersaved smbfs suseRegister ypbind autofs Welcome to SUSE Linux Enterprise Desktop 10 SP1 (i586) - Kernel 22.214.171.124-0.2.5-default (tty1). linux-bvuz login: Starting ZENworks Management Daemon^[^[^[
I am new to Linux, I had Just Installed Red Hat Enterprise Linux 5 on y desktop PC, the installation is completed ok, while installation process, RHEL ask me for the root password and I had entered my password, now after the installation is finished and my PC Reboot, RHEL asks me Username, Now here I am confused, while installing RHEL it had only asked me the Password, now what is the username for RHEL? One more thing I would like to ask, I had one more Hard Disk Drive of 80GB and on it I had installed Windows XP, now I want to Dual boot Windows XP and RHEL, can I do it from two different OS installed in two different Hard Disk Drives, If yes Please Provide Procedure.
This causes Tomcat to be run as myuser, which is expected. However after issuing the reboot command the system starts up and root is now the owner of this process. How can I force the process to be started off as myuser on reboot?
I'm using 11.04 and when I boot I see post messages and then when it gets to grub I just see black screen with a monitor timing not supported issue. I have a geforce 6100 nforce 405 video card with a Dell U2311H monitor. It does boot to the desktop eventually, and everything from there on works as expected.
I am runig a program on a server at my university that has 4 Dual-Core AMD Opteron(tm) Processor 2210 HE and the O.S. is Linux version 126.96.36.199-78.2.56.fc9.x86_64. My program implements Conways Game of Life and it runs using pthreads and openmp. I timed the parrallel part of the program using the getimeofday() function using 1-8 threads. But the timings don't seem right. I get the biggest time using 1 thread(as expected), then the time gets smaller. But the smallest time i get is when i use 4 threads.
Here is an example when i use an array 1000x1000.
Using 1 thread~9,62 sec, Using 2 Threads~4,73 sec, Using 3 ~ 3.64 sec, Using 4~2.99 sec, Using 5 ~4,19 sec, Using 6~3.84, Using 7~3.34, Using 8~3.12.The above timings are when i use pthreads. When i use openmp the timing are smaller but follow the same pattern.I expected that the time would decrease from 1-8 because of the 4 Dual core cpus? I thought that because there are 4 cpus with 2 cores each, 8 threads could run at the same time. Does it have to do with the operating system that the server runs?
Also i tested the same programs on another server that has 7 Dual-Core AMD Opteron(tm) Processor 8214 and runs Linux version 2.6.18-194.3.1.el5. There the timings i get are what i expected. The timings get smaller starting from 1(the biggest) to 8(smallest excecution time).The program implements the Game of Life correct, both using pthreads and openmp, i just cant figure out why the timings are like the example i posted. So in conclusion, my questions are:
1) The number of threads that can run at the same time on a system depends by the cores of the cpus?it depends only by the cpus although each cpu has more than one cores? It depends by all the previous and the Operating System?
2) Does it have to do with the way i divide the 1000x1000 array to the number of threads? But if i did then the openmp code wouldn't give the same pattern of timings?
This is probably a newbie problem, so forgive me, but when I do this:chmod o+rw /dev/nst0It resets back to what it was upon reboot. How do I get this change to stick?I tried searching the forums and Google, but I haven't found an answer.
I encountered problem on my NEW PROD box. I have remaining space of 300GB and i decided the create a /dev/mapper/VolGroup00 using Redhat Gui. It is successful. Then, i decided to create logical volumes out of it..
I am trying to download RHEL 5.4 AS version for testing..But under [URL] There is no specific link for AS version or ES version..How can I detect which iso is for AS and which one for ES..? There are separate links for AS and ES version for RHEL 4.x version but why is it not available for RHEL 5.x versions?
I am using sda1 as /, which is a bootable drive. I do not know if my problem is that I did not create a /boot drive. After removing the iso dvd, I tried to reboot and I get this back: -bash: /sbin/reboot: input/output error Then it returns me to the terminal prompt.
The solution should be capable to use intranet only (no communication should traverse the inernet). It would be of an advantage if it would support conferencing. And if it's possible it'd be fine if it'd be free.
One solution which comes to my mind is jabber, but I do not have any experience with it... what's your oppinion on that? What other solutions are there?
I have two HP servers which have a total of 10 Ethernet ports each, both running RHEL 5.7. I need to make sure that Ethernet ports are mapped to the same devices in Linux on both systems (see below) because these servers must be identical (the second box is a drop-in replacement in case the first system fails).The ethernet ports on the first system are mapped as follows:
Device Port eth0 Intel Dual Port Card, Port 1 (Rightmost Port) eth1 Dual, Port 2
I am using a Red Hat enterprise server 5.0 I would like to know if there is a way to extract a single file from inside a war file and display its contents on the screen? For example: I have a file labeled test.war and inside this war there are multiple files/directories. I am interested in seeing the contents of one file labeled MANIFEST.MF without having to unzip the entire war file. does it make sense?
I successfully install vnc server and client in my machine after installation in GUI mode i clicked on service and enable vnc server when i click on start. It says that "This service is being refreshed right now" Then after i use terminal and typed "#service vncserver start" its display error message "Starting VNC server: no displays configured [FAILED]"
I just installed Red Hat 6 but when I try to login it prompts me to enter a "Smartcard Authentication" instead of a user name. Does anyone know how to get pass this? and just login with the user name I created or the root?Here's a screenshot of the login screen:[URL]