Linux - SoftwareThis forum is for Software issues.
Having a problem installing a new program? Want to know which application is best for the job? Post your question in this forum.
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Introduction to Linux - A Hands on Guide
This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.
Click Here to receive this Complete Guide absolutely free.
Hello. I have installed CentOS on a VM2007 (from M$).
Version 2.6.18-164.11.1.el5 (Red Hat 4.1.2-46).
On the instance is installed Asterisk, whole packet is from the AsteriskNOW! CD.
Unfortunately I have problem with time - the time simply goes to fast (or sometimes to slow). I have maked a
but that didn't help.
I have also tried a ntpdate together with cron, and also failure. Cron works, the log shows, that the script with ntpdate is running but I see no result - I still have a problem with the time.
How can I solve this?
The problem is the software you are using, this issue is resolved in VirtualBox using Guest Additions, and in VMWare using tools. AFAIK, MS does not support RedHat or CentOS, therefore, there is no guest additions for VM2007. However, I may be wrong, it is worth checking out microsofts support pages.
Just a note on the issue, it is caused by the abstraction layer presented to the guest OS, where the clock cycles of the CPU are presented inaccurately. What you probably notice is that at system start up, the time is correct, since the VM will sync with the host hardware clock at boottime, but then falls out of sync rapidly. The solution that I refer to above essentially creates a link between the host and guest clocks, but as you can imagine, this can only be initiated from the guest OS, not the other way around.
I have tried to install AsteriskNOW! on a Sun VirtualBox. Installation goes succesfull, but I can not install Guest Addons:
sudo sh /mnt/cdrom/VBoxLinuxAdditions-x86.run
Verifying archive integrity... All good.
Uncompressing VirtualBox 3.1.6 Guest Additions for Linux........
VirtualBox Guest Additions installer
Removing installed version of VirtualBox Guest Additions...
Building the VirtualBox Guest Additions kernel modules [FAILED]
(Your system does not seem to be set up to build kernel modules.
Look at /var/log/vboxadd-install.log to find out what went wrong)
Installing the Window System drivers [FAILED]
(Could not find the X.Org or XFree86 Window System.)
I have installed kernel-devel, kernel-headers, dkms gcc, rebooted and still nothing... Is Guest Addons installing required to properly count time?
But the question is - what else should I do to make the clock work correct with VirtualBox?
Why the hell VirtualBOX is so slow? I have running VB on xeon 3050 with sbs2k3 and 2GB of RAM - when I connect to the IVR i hear voice like Zeus - very slow and with flicks. All the CLI also works very slow. VM2007 works fine...
Last edited by Stressik; 03-30-2010 at 01:09 AM.
Reason: another issue