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  • A Versatile Physical Server

    - by Paul
    How does one judge potential memory and processor needs for linux web servers? Specifically, given: A Debian or Ubuntu OS Running a web server (apache2), and A database (MySQL), and A DNS server (bind), and Being used by up to 100 concurrent users, at some points each downloading high-resolution (0.5 to 1 MB) images via a web app. How much should one budget in terms of RAM, type of processor(s), and number of cores? Thanks!

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  • ntp.conf sync to local machines

    - by anonym
    I have 2 linux machines, they do not have internet connectivity or any other means of getting an external clock. I need one of them to act as the "master"/server and the other machine to sync it's clock to that server. It's not important that the time is correct, it's only important that the time is the same on these 2 machines. So, give I have a server (192.168.1.10) and a client (192.168.1.11), how do I set up /etc/ntp.conf on these 2 machines respectivly ?

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  • Find directories that do not contain a directory?

    - by erikcw
    I'm trying to figure out how to use the linux "find" command (or another command that will get the job done) to return a list of file paths/directories that do not contain a directory of a certain name. ~/web/domain1.com/public_html/bar ~/web/domain2.com/public_html/ ~/web/domain3.com/public_html/bar ~/web/domain4.com/public_html/ I want all of the paths that don't contain the directory named "bar" (domain2.com and domain4.com). Any idea how I can get find to output such a list? Thanks!

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  • What is the reason partitioning is usually a step in installing multiple OS's?

    - by P.S.
    What is the reason partitioning is usually a step in installing multiple (2) operating systems on the same computer? Does an operating system have to have it's own partition to run or can it run in the same partition as another operating system? (i.e. -can two of the same flavor run in the same partition but if you have one Linux and one windows it needs to be partitioned?) Is it necessary to make disk partitions to run multiple operating systems?

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  • Capture virtual machine traffic in Fiddler

    - by HtS
    I'm running Ubuntu in a virtual machine (host machine is Windows 7). Is it possible to use Fiddler in the host machine to capture the traffic from the virtual machine? Seeing as the virtual machine's network must be passing through the host computers NIC, can Fiddler capture the packets? (I don't know of any free alternative to Fiddler for Linux, except Tamper Data, but I need a bit more control). Thanks.

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  • How do I preserve ownership permissions when copying to an external volume?

    - by Yitzchak
    When I upgrade or reinstall linux I backup my home folder by running sudo cp -pr /home/users/yitzchak /media/externalHDD/backups. When I do this I get errors saying that permissions could not be preserved and when I copy the folder back onto my local disk I see that ownership has been changed to root and I have to chown all of them back, which has to be done manually piecemeal because not all files have the same group. Is there any way around that?

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  • Updating Python on Ubuntu system

    - by efficiencyIsBliss
    I want to update the Python build on my Linux box, but the only way I know how to do it is uninstalling the current version and installing the new one. My system is already up to date (I updated yesterday). I wanted to know if there is a way to update a specific program from the command line, like sudo apt-get update <program-name>. I know this command doesn't exist, but I'm hoping something equivalent does.

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  • Can I boot my notebook via eSata pci-xpress card?

    - by OliverS
    I would like to boot directly from an external hard disk to improve performance over my internal notebook hard disk. My notebook has no native eSata jack but a pci express card. As my BIOS doesn't support the card on boot time so no way directly booting it. My question is, is it possible to work around this issue by using an USB stick or similar with a boot loader like grub and if so, will this only work for Linux or Windows as well?

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  • local host gives error 403 on Ubuntu

    - by Dan
    Hello I am new to ubuntu linux and am currently trying to configure my netbeans to work with PHP. I have found several tutorials to install all the applications I need and have installed a virtual directory for netbeans to run in. Unfortunately, whenever netbeans or I myself go to my local host I get an error 403. I tried modifying my settings to allow from localhost (instead of allow from all) but this did not work and am completely out of ideas.

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  • File shares for Mac users

    - by Generic Error
    The main file shares on our network are currently hosted by old Apple XServes. I had planned to replace some of these with Windows shares as I have better hardware available but have been told this is likely to cause issues with some of our Mac users. What sort of issues am I likely to run into and what are the recommended ways of hosting general file storage in a mixed OS (Windows, OSX, occasionally linux) environment?

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  • Unable to view users and groups

    - by Ewr Xcerq
    I am using Centos5 running on a VMWare but whenever I choose to open the User Manager menu from System-Administration, an error message always displays The user database cannot be read. This problem is most likely caused by a mismatch between etc/passwd and /etc/shadow or /etc/group and /etc/gshadow/. The program will now exit. I am a Linux novice and have no idea how to fix this tiny issue. ANy help is thankful. Thank you.

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  • Forward my http requests blindly through to a new server

    - by Jason
    I need to forward any http request from my old server IP to my new IP. I migrated servers and there are a few domains that have a high TTL and I could not update. Is it possible to take all HTTP requests from one server running centos/whm/php/apache 2+ and forward them to the new ip? Since I have hundreds of domains I'd prefer a solution that involves running an app on the linux box that will push requests automatically to the new box. Thoughts? Cheers

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  • Learn to use both sides of the keyboard

    - by brewerja
    I'd like to force myself to use the correct (right side or left side) Shift, Ctrl, and Alt keys depending on what letter I'm typing. For instance I'd like to use the right Shift key when typing 'A' and the left Shift key when typing 'P'. I find myself using only the left side a lot and I'm looking for a way to set the mappings on my machine so that it only responds to correct pairings. I'm running Fedora, but any Linux distro support would be an acceptable answer.

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  • Lightweight ad-blocker for firefox

    - by student
    On a old machine (512 MB RAM) I am currently running ubuntu jaunty and firefox 3.0.15. I tried the ad blocker addon add block plus but it eats lots of RAM (300 MB). Is high memory load of this add-on a bug, which is fixed in a newer version or just normal? If so, why is the memory usage so high? Is there another ad blocker add-on for firefox or another browser- add-on combination for linux (ubuntu jaunty) which uses significant less RAM?

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  • Traffic going to wrong server

    - by markxi
    I'm in the process of migrating to a new server, but some traffic that should be going to old server is now coming to the new server before I am ready to migrate. My provider used an IP used as the secondary nameserver on the old server as the primary IP on the new server, so now my secondary nameserver is directing traffic to the new server. Is there a way to forward the traffic hitting the new IP back to the old IP while I wait for DNS to propagate? Server is Linux CENTOS 6.5 x86_64 w/ cPanel Thanks

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  • Find out how many memory my server would need ideally?

    - by Daniel
    I have a pretty busy GNU/Linux server that I think needs more RAM. I know that the free command doesn't show the amount of RAM that is used. So I was stumbling upon Commited_As in /proc/meminfo. It currently shows 57972 kB which isn't much. Is this the amount of RAM that the processes use "right now" or is this an estimate of how many additional RAM it would take to never run out of memory with this load?

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  • Java Applet Console

    - by Jivings
    Can anyone tell me how to access the Java Applet Console in Chromium for Linux? I assumed there would be a Java application packaged with the JRE that would give me access through the command line, but I can't find reference to anything. $ java -version java version "1.6.0_24" OpenJDK Runtime Environment (IcedTea6 1.11.2) (ArchLinux-6.b24_1.11.2-1-i686) OpenJDK Client VM (build 20.0-b12, mixed mode)

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  • Unix bidirectional pipe on commandline

    - by John W
    I've been able to use this linux command to connect Netcat to a serial port: nc -l 80 <> /dev/ttyS0 I would like to be able to log this transaction. My backup plan is to use Wireshark to monitor the netcat stream, but ideally I'd like to do something like this: cat /dev/ttyS0 | tee upstream.bin | nc -l 80| tee downstream.bin | /dev/ttyS0 This tries to open ttyS0 twice and therefore throws a permissions error. Does anyone know a smarter way to do this?

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  • Sharing a serial port between two processes

    - by peterrus
    As it is not possible to directly share a serial port between two processes using Linux, I am looking for another way to achieve this, I have heard about socat but could not find a concrete example of how to realize the following: Split one physical serial port (/dev/ttyUSB0) into two virtual ports, one for reading and one for writing, as one process only needs to send data, and one only needs to receive data. I can no modify the sending application unfortunately.

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  • Any dangers of sharing /home partition between two distros?

    - by Linux_iOS.rb.cpp.c.lisp.m.sh
    I have a laptop with a 250GB HDD. I have an existing installation of Kubuntu across three partitions (A 20GB one for /, 2GB for swap, and something like 97GB for /home). If I add another partition, use that as / for a Mint 13 install, and then use the existing /home partition as Linux Mint's home folder (different user names), are there any dangers (besides badly done partitioning, and other dumb things like that)?

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