When I was using Virtual Box in Windows 7, I could choose how many CPU cores to assign to the guest OS. Now I'm using Linux, and when I installed Virtual Box, I couldn't find that option. System Monitor shows that when the VM is busy only one CPU core goes to 100% while the rest are near 0%. How can I make Virtual Box in Linux use multiple CPU cores?
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I'm trying to connect one computer to two others in an ad-hoc infrastructure.
[computer 1] ---- [computer 2] ---- [computer 3]
computer 2 is running Linux and has a single NIC wlan0. I want to it to connect to both computer 1 and computer 3 so each computer can talk to the other. No switch is available so it needs to be an ad-hoc setup.
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Newbie question here. I just realized that I can tell make to use multiple cores to compile by doing PHP Code:makewhich is just awesome on a quad core with hyperthreading (I just compiled 2.6.33-rc5 in under 5 minutes!) I know aliases are possible, though I've never had much need. What I would like to know now, is if it would be safe to alias make to mean PHP Code:so that by default I use 6 of the procesors when building or if there would be occasions that compiling on multiple processors would be a bad thing
View 10 Replies View RelatedWhenever I monitor my CPU's, it seems only the first is ever utilized, with the second always being at 0%.Does this mean it is not being used, or just not being reported as in use?Is there anything I could do to improve the situation if it is not being used as much as it could be?On Windows, I can assign processes to both cores, or either one. Is there a way to do something similar in Linux?
View 10 Replies View RelatedI'm using bioinformatics programs i run from console on my system or on the server and some of them don't have a option for use multiple cores/cpus.There's a way to force it? some programs have to run for days and use a single core...
View 1 Replies View RelatedI first tried latest version 10.10 desktop. very slow booting in a Centrino CPU laptop not booting at all in a N455 CPU netbook. Tried version 10.04 which seems to work better fast booting in Centrino CPU laptop. fast booting in N455 CPU netbook. From Centrino Laptop with Windows XP on HD, once loaded Ubuntu as persistent live program from a USB drive, tried to install the program on SD memory card in PC slot. Upon request, installation made onto that memory only, not on inside HD, hence formatting only that memory. Upon completion, after removing the external memories and booting again the PC it does not boot of its own any more. XP OS damaged. I have recovered the system with a Toshiba backup CD but the HD has been formatted and all data lost. How can this happen ? I'll never try anymore to permanently install Ubuntu. I'll use it as persistent live on an external memory. I only have an old PC laptop with 128 MB RAM for further installation testing but no Ubuntu release can boot there. By the way, Lubuntu 10.10 look more fast and safe although appears to have more limitations then Ubuntu 10.10.
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What I want: multiple virtual hosts with ssl and only 1 ip address: In my example: server = 192.168.227.129
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Interpreting the output of /etc/proc/cpuinfo.
This is a Linux Box.
Here is the output and I need to know how many CPUs we have and how many cores per CPU.
I am using the standalone k10temp temperature sensor but it doesn't give the actual temperature of the cpu, just some "bogus" temp value that isn't very useful.Does anyone know how you can calculate the real temperature from this reading?
View 3 Replies View RelatedMany commands in Mathematica 8 (Integrate, Simplify, etc.) seem to only be using a single core on my system. Is there any way I can change the affinity so that it utilizes all cores for computations?
View 3 Replies View RelatedI have a four-cores machine (core1,core2, core3, core4 ). I want to test the communication or latency between two cores (for example, core1 and core2; core3 and core4). Does anyone know how to write a code to test it under linux operating system?
View 1 Replies View RelatedI have a 8 core computer, which has 8 logical processor in total. I want to create 8 process(nodes). Each node is mapped to each logical processor. The order is code...
I wrote the code as below, could you please see whether it is correct? code...
I am new to the forum and new to Linux.
I am trying to explore if Linux can be run on a multicore platform when the max frequency of one the cores is less than the others.
please give me some pointers or let me know if you have tried such HW configuration.
There is a computer with two "Xeon(R) CPU X5550 @ 2.67GHz" CPU. The Hyper-threading is enabled, so it looks like 16-core system, but really there is only 8 physical cores.
I know that when hyperthreading is enabled, each physical core is splitted into two virtual cores. I want to know, which pair of virtual cores shares a physical core and which are not. Or, how (in what order) will Linux enumerate HT-cores comparing to real cores. (enumerating is done for sched_setaffinity and taskset masks).
I have a dump of /proc/cpuinfo file from the system.
I think there are possible:
CPU0-CPU7 are not sharing phys. core. CPU8-CPU15 too. But sharing is in pairs CPU0+CPU8, CPU(i)+CPU(i+8) and so on. or CPU0+CPU1 are from single physical, CPU2+CPU3, CPU(2*i)+CPU(2*i+1). or exotic CPU0+CPU15 sharing, CPU1+CPU14 ... or random?
The hard moment in this case is that there are 2 physical dies of CPU (two sockets), and usual recommendation of using "physical id:" field can't help
The cpuinfo:
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 26
model name : Intel(R) Xeon(R) CPU X5550 @ 2.67GHz
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Is it possible to create virtual network adapter on the same physical network adapter? or How to give or have multiple MAC Address to the same adpater? I m working on centos 5.3.
View 6 Replies View RelatedI need to set a NAC (PacketFence) system , i would like to set in my case eth0 to work with several different VLAN'S i created ifcfg-eth0.2 copied from orginal ifcfg-eth0 and changed the ip and append VLAN=yes but when i am triyng to load ifcfg-eth0.2 i get error
I must missed something
My ifcfg-eth0 goes as follow
Code:
My ifcfg-eth0.2 goes as follow
Code:
How to give mulitple virtual host in apache. I want to access all my sites with ip 192.168.1.125
For ex :if i want to access dpm.net it should have the ip 192.168.1.230 with port 80 & for persur.net it should have the same ip 192.168.1.230 with port 80
After restarting the apache servers.I am unable to run both the applications in a single time.
For that i gave Include /etc/apache2/sites-enabled/[^.#]* in apache2.conf. But still its not working.
I now have 2 desktops running debian. I have virtual servers running in desktop 1, and I am hosting my photos using Gallery2. I have copied Gallery2 and the mysql over to desktop 2. I have entered port forward to desktop 1 using port 80 (using my router), and desktop 2 using port 1000. I can only access Gallery2 in desktop1. If I tried to access Gallery2 in desktop 2, I got re-directed to desktop1.
Questions:
1. Are home routers capable of port forward to more than one computers in a home network behind the firewall of the router? It is Belkin N+ router.
2. Can multiple virtual servers be setup in 2 desktops?
I have a MacBookPro5,1 system that can boot into Fedora 12 x64 as well as Mac OS X. My installation of Fedora is set to use the nVidia graphics drivers to provide 3D acceleration when running the operating system natively. I have installed VMware Fusion on Mac OS X, and I can use it to boot my installation of Fedora into a virtual machine. However Fedora refuses to go into X Windows and just sits there with a blank screen. I can use Ctrl+F2 to switch to a command line and log into the system through the command line interface.
I'm not exactly sure why this is happening. However, I suspect that it is because when the system runs virtually, it does not make use of the nVidia graphics card. Instead VMware Fusion provides a virtual VMware SVGA 3D adapter. What would it take so that Fedora would use a driver that is compatible with this virtual display adapter when running in a virtual machine, and then use the nVidia driver when the system boots natively?
What is the best way to go about setting up multiple virtual hosts on the same box, one using http and one using https/ssl? I'd like to serve them from the same ip address if possible; I know it's possible in apache 1.3.
View 2 Replies View RelatedI have set up a SSL site for my default Apache server. But I want to set up multiple SSL sites for multiple IP based as well as Name based Virtual hosts. Is there a way where in I can include definitions for SSL certificates and keys within the Virtual Host directive in the httpd.conf, so that I can specify separate key and cert file for every Virtual Host.
View 11 Replies View RelatedI need to set a NAC (PacketFence) system (CentOS 5.5), i would like to set in my case eth0 to work with several different VLAN'S i created ifcfg-eth0.2 copied from orginal ifcfg-eth0 and changed the ip and append VLAN=yes but when i am triyng to load ifcfg-eth0.2 i get error
my ifcfg-eth0 goes as follow
# Intel Corporation 82578DM Gigabit Network Connection
# Normal VLAN Lan adapter (Managment)(On-boad 1st NIC)
DEVICE=eth0
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My questions begin with Virtual Box. I have Windows XP installed via Virtual box. Ordinarily, I hate everything about windows, but unfortunately some things related to my job I am still in need of having some access to some form of Windows. I am wanting it to recognize all of my multiple hard drives that are installed on this system, 4 of them to be exact, so that I can utilize files from all of them.
View 3 Replies View RelatedAccording to Distrowatch, the two most downloaded distributions are Mint and Ubuntu. I have put both on my computer. In Mint I can find no way to put multiple virtual desktops in my panel. In Ubuntu 10.10, when I go to synaptic package manager the settings tab with the repositories is dimmed out. I have enabled the sources list in administration but it is a less convenient way to add repositories. Despite what the linux community seems to think, I find that Simply Mepis and Pclinuxos are better for actual use.
View 4 Replies View RelatedI have some problem in apache2 configuration. I have two websites on same IP on LAN.i.e. 192.168.1.5
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What should I check in a few blogs I checked they said to mention in [URL]...But in this case what should I put I have two different websites or what other thing I have missed? I do not have access to DNS so that on LAN I can point site1.abc.com and abc.com to same IP 192.168.1.5 which to me seems could resolve the issue.
I would like to configure and SAN disk. But I do not have a physical SAN disk. Is it possible to create and configure a Virtual SAN disk and work on it with virtual machines?I have around 400GB of space in my Laptop.
View 7 Replies View RelatedI am to rename all the files within a directory (which contains multiple subdirectories) recursively without invalid characters.
I tried the coding posted above.
find . -type f -printf '%p
' | while read file; do
oldfile=$(basename "$file")
newfile=$(echo "$oldfile" | sed 's/[^A-Za-z0-9_.]/_/g')
if [ ! "$newfile" == "$oldfile" ]; then
echo mv "$file" "${file%$oldfile}$newfile"
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but I get an error on both of them stating "find: bad option -printf find: [-H | -L] path-list predicate-list"
I'm starting to have A LOT of opened windows in my machine. Sometimes within a project, I have e-mail/task management/personal e-mail/twitter, and a lot of different opened applications/terminals in my Linux workstation.Sometimes it would be interesting to have different workspaces to projects instead of this configuration I have nowadays that are classes of work (bad name, I know, but I think you got the idea).I'm starting to think about using two monitors: one with Corporate Management, Work and Personal. The second monitor is only the development state: each workspace here is about a project being worked on instead of groups of works like before. A workspace may be implementing different classes for example.
My question is: I just want to change to a second monitor using the mouse. I want to still be able to change workspaces in the same monitor using keyboard shortcuts. The keyboard shortcuts wouldn't change monitors, just worskpaces on the same monitor. All the tutorials I read (like this one) only tells how to use multiple monitors but doesn't answer my question about keyboard shortcuts.Does Linux (Ubuntu 10.04 Lucid Lynx or Debian 5.0.5 Lenny) support this envisioned setup (Different workspaces in a way that keyboard workspace switching only works in the current monitor) ? If so, how?I haven't tested this setup, that's why I'm asking. In this question the user says it works exactly how I want it to behave, can someone else confirm it?
is there any HOWTO for configuring Webmin Postfix server with multiple postfix virtual hosts? Seems to be a tough challenge to set it up without any easy manual..
View 1 Replies View RelatedI've been scanning the apache2 docs for the past few days and have not come up with an answer my following issue:
In my httpd.conf file, at the very end, I have the line
Include conf/vhosts/vhost_*.conf
However, when I run apache checkconfig or try to start apache, it gives me the error:
httpd: Syntax error on line 993 of /etc/httpd/conf/httpd.conf: Could not open configuration file /etc/httpd/conf/vhosts/vhost_1.conf: Permission denied
It appears as if the Include line is correct - in terms of it grabbing the first virtual host conf file. However, I'm confused on the permissions. the /etc/httpd folder is owned by root:root, as are the subfolders. As a test, I chown'd the conf/vhost folder combination and all the vhost files to apache:apache to see if that made a difference, and it appeared to make no difference at all. The log files don't contain anything (assumed because apache isn't starting). If I place the contents of the vhosts in a singular vhosts.conf it works - with the permissions set to root:root. I'd like to avoid having to use one vhosts conf for the configuration I'm trying to achieve - as it would make my life a lot easier.
