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• DNS server and fallback outside home

  - by Jens

  I have my own DNS server at home to access local names, and that is working fine. Then I have my laptop, now obviously my laptop leaves the home now and then, therefore it accesses different nets outside my home, and my DNS server is not accessible there... So I figured that I would just add Google as secondary DNS... But actually, when I do that, then suddenly I can't access my local stuff, the page won't resolve (at home that is, obviously), like my laptop is getting a quicker response from Google's DNS or something, because it can't find anything on the addresses I use locally. If I then remove the secondary DNS, and keeps my own, then it works fine again... So do I somehow need to seperate what DNS's to use on what nets? I already use sepperate DNS settings when I connect using my 3G modem, but when I use hotspots it seems to use the same settings regardless (at least in the train), also can it differ wired connections?... Is there another solution? OS: Windows 7 Ultimate, x64 EDIT: Currently trying this "hack/fix" out for the time being: http://blog.johnruiz.com/2011/12/windows-does-not-always-honor-dns-order.html

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• In spite of correct DNS, Exchange sending to wrong destination server for single outbound domain

  - by beporter

  My company uses an SBS 2003 server and makes use of Exchange to host our own email. We also have a linux server hosting domains for some of our clients. In order for us to send to those clients, we had internal DNS set up to shadow the client domains to provide "correct" MX records inside our network. For example, public DNS for a domain abc.com might point to 1.2.3.4, but internally we have MX records set up to route mail for abc.com to 172.16.0.4, which is the linux email server. This setup was entirely functional; this is just back story. We've recently moved one of our client domains from our internal linux server to an external email provider. When we did that, we naturally deleted our internal shadow DNS records so our Exchange server would fetch correct (public) DNS records and route mail out to the new external host. This has NOT had any effect on Exchange though. Even after rebooting the Exchange server and completely flushing the DNS cache (nslookups on the Exchange machine itself correctly resolve to the new external address) Exchange still attempts to deliver messages for the domain to our internal server! Exchange correctly routes to all other internal and external domains when sending email. Somehow Exchange is trying to deliver to a machine that by all accounts it has no business trying to use for just this one domain. Is there a DNS cache that Exchange uses internally? Is there a way to flush that internal cache? What else could I be missing?

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• Help! The log file for database 'tempdb' is full. Back up the transaction log for the database to fr

  - by michael.lukatchik

  We're running SQL Server 2000. In our database, we have an "Orders" table with approximately 750,000 rows. We can perform simple SELECT statements on this table. However, when we want to run a query like SELECT TOP 100 * FROM Orders ORDER BY Date_Ordered DESC, we receive the following message: Error: 9002, Severity: 17, State: 6 The log file for database 'tempdb' is full. Back up the transaction log for the database to free up some log space. We have other tables in our database which are similar in size of the amount of records that are in the tables (i.e. 700,000 records). On these tables, we can run any queries we'd like and we never receive a message about 'tempdb being full'. To resolve this, we've backed up our database, shrunk the actual database and also shrunk the database and files in the tempdb system database, but this hasn't resolved the issue. The size of our log file is set to autogrow. We're not sure where to go next. Are there any ideas why we still might be receiving this message? Error: 9002, Severity: 17, State: 6 The log file for database 'tempdb' is full. Back up the transaction log for the database to free up some log space.

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• Expanding to dual video cards

  - by Anthony Greco

  I know a lot of factors can go into play here, so I will list my current hardware and setup: MOBO: GIGABYTE GA-890FXA-UD5 [http://www.newegg.com/Product/Product.aspx?Item=N82E16813128441] Processor: AMD Phenom II X6 1090T Black Edition Thuban 3.2GHz [http://www.newegg.com/Product/Product.aspx?Item=N82E16819103849] Ram: G.SKILL Ripjaws Series 16GB (4 x 4GB) [https://secure.newegg.com/NewMyAccount/OrderHistory.aspx?RandomID=4933910872745320111128011418] Current video card: EVGA 01G-P3-1366-TR GeForce GTX 460 SE [http://www.newegg.com/Product/Product.aspx?Item=N82E16814130591] OS: Windows 7 Ultimate x64 Currently I can run 2 monitors just fine in my setup. However, I want to upgrade this to 4 monitors. My question is, what is the best way to do this? I remember in the past reading I need the same type of video card, however would any GeForce GTX work, or do i need that very specific model (EVGA 01G-P3-1366-TR GeForce GTX 460 SE)? Are there any issues I should be aware of before I order 2 new monitors and a video card? Are there video cards better setup for this? I know NVidia offers SLI, however I do not know if my mobo is compliant. My mobo also offers CrossFireX configuration, though from what it says only Radeon are compliant. Any suggestions / feedbacks on my best route with my current setup is appreciated. Even if you suggest buying 2 new identical video cards, as long as you can mention which and why that is better I really appreciate it. Note: I really do not do any gaming. I sometimes do some 3D work in Unity and very rarely in Maya. Besides that I mostly do all my computer work in Visual Studios and Photoshop. I however need the 2 extra monitors because I monitor sometimes 5 remote desktops at once and switching on only 2 is becoming a very big pain. Also seeing 3 side by side while I work on the 4th will be very helpful. Again, I appreciate any feedback, as I have googled a bunch and just want to make sure what I buy will work.

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• Hosting websites in our Workplace custom-built datacentre

  - by i.h4d35

  I'm faced with unique learning opportunity at work at the moment. Due to the slowdown (amongst other reasons), the powers that be at my office have decided to abandon our shared hosting providers (both shared and dedicated hosting) and have decided to host the websites at our office's datacentre. We're running 7 websites, wherein the average unique hits per day at the moment is about 900. We have 2 servers set aside for this - one is a DELL POWER EDGE 1850 (Intel Xeon 3 GHZ*2, 4GB RAM, 73GB HDD and the other is an HP DL 380 G3 (Intel Xeon 2.8 GHz, 6 GB RAM, 73 GB HDD) a) I would like to know the pros and cons of going ahead with this project.All the sites will be hosted on a single IP. In all probability, the OS is going to be CentOS. b) Do you think I should consider Virtualization into this equation (KVM/Xen)? I was thinking in terms of separate instances of the DB server and the frontend though I do not know if this is the best way to go. c) Should I be trying to use cloud stacks like OpenStack and try to make it look like websites hosted on some sort of Public Cloud? (something that I checked out here). Here is something else I came across, which looks similar to what needs to be done at our office. About the websites - Of the 7 websites, 4 are basic static websites which basically gives a whole lot of information about a few local institutions. The remaining 3 are local product-based websites developed in PHP wherein end user can view products and order them online. I am trying to take this as a learning experience wherein I can learn to build something from scratch and save the company a little something in the process. The migration needs to be completed by Easter so I guess it gives us some time (or am I being overly optimistic??). I am confused here and would appreciate all the help I can get. Thanks in advance.

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• CUPS causes printer to click and doesn't print

  - by Pez Cuckow

  I'm suffering a strange problem with my Cannon iP4850 when trying to use CUPS on a Raspberry Pi (this is not RPi specific, please do not vote to move it). When I plug the printer into my Laptop (OSX) or my Desktop W7 it identifies as a iP4800 and prints perfectly. So I plug it into the Pi (running debian), set it up in CUPS enable sharing and can now see the iP4800 series shared on the network. However if I print to it (using AirPrint etc...); the file gets to CUPS safely (shows in the queue) but when it tries to print the printer clicks (like a loud thunk) 3/4 times and then gives in, with a double amber flashing light. In cups it shows as job completed. Do you know why using the pi and cups would cause what appears to be a hardware fault and what I can do to fix the problem or to provide further debug info? Thanks for your time! Description: Canon iP4800 series Location: Lounge Driver: Canon PIXMA iP4800 - CUPS+Gutenprint v5.2.9 (color, 2-sided printing) Connection: usb://Canon/iP4800%20series?serial=2239B2 Note: I've tried deleting and re-adding the printer to the Laptop, Desktop and PI and the results are always the same Log for plugging in printer and printing (attempting to) something until the printer turned off again pi@pezpi /var/log $ dmesg [ 7284.176336] usb 1-1.2: new high speed USB device number 8 using dwc_otg [ 7284.279703] usb 1-1.2: New USB device found, idVendor=04a9, idProduct=10d5 [ 7284.279750] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 7284.279771] usb 1-1.2: Product: iP4800 series [ 7284.279786] usb 1-1.2: Manufacturer: Canon [ 7284.279800] usb 1-1.2: SerialNumber: 2239B2 Setting cups to verbose: Change loglevel in cupsd.conf to debug (or debug2) pi@pezpi /var/log $ sudo vim /etc/cups/cupsd.conf pi@pezpi /var/log $ sudo /etc/init.d/cups restart [ ok ] Restarting Common Unix Printing System: cupsd. pi@pezpi /var/log $ Log from $ /var/log/cups/error_log is at http://pastebin.com/7VZMRMrG (too large to post here) The log contains - in order (deleted the log and then did the beneath) Restarting the cups server Attempting to print a test page x2 Printing from 192.168.1.90 via AirPrint Printing from 192.168.1.90 via Network Print Turning the printer off and on again

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• Apache + PHP via FastCGI

  - by Wilco

  I'm running into some problems while attempting to run PHP via FastCGI in Apache. I have the FastCGI module loaded, but get the following error when attempting to load a page: The requested URL /fastcgi/php54.fcgi/index.php was not found on this server. Somewhere, it seems that the script to be executed is appended to the executable without any spaces. Is this where the problem likely is? Below I've included snippets from my Apache configuration (hopefully this is enough): LoadModule fastcgi_module libexec/apache2/mod_fastcgi.so FastCgiIpcDir /var/run/fastcgi AddHandler fastcgi-script .fcgi FastCgiConfig -autoUpdate -singleThreshold 100 -killInterval 300 AddType application/x-httpd-php .php ScriptAlias /fastcgi/ /Library/WebServer/FCGI-Executables/ <Directory "/Library/WebServer/FCGI-Executables"> Options +ExecCGI SetHandler fastcgi-script Order allow,deny Allow from all <VirtualHost *:80> ServerName www.somedomain.com ServerAdmin [email protected] DocumentRoot "/Web/www.somedomain.com" DirectoryIndex index.html index.php default.html CustomLog /var/log/apache2/access_log combinedvhost ErrorLog /var/log/apache2/error_log Action application/x-httpd-php /fastcgi/php54.fcgi <IfModule mod_ssl.c> SSLEngine Off SSLCipherSuite "ALL:!aNULL:!ADH:!eNULL:!LOW:!EXP:RC4+RSA:+HIGH:+MEDIUM" SSLProtocol -ALL +SSLv3 +TLSv1 SSLProxyEngine On SSLProxyProtocol -ALL +SSLv3 +TLSv1 </IfModule> <Directory "/Web/www.somedomain.com"> Options All -Indexes +ExecCGI +Includes +MultiViews AllowOverride All <IfModule mod_dav.c> DAV Off </IfModule> <IfDefine !WEBSERVICE_ON> Deny from all ErrorDocument 403 /customerror/websitesoff403.html </IfDefine> </Directory> </VirtualHost> ... and this is the executable: #!/bin/sh PHP_FCGI_CHILDREN=1 PHP_FCGI_MAX_REQUESTS=5000 export PHP_FCGI_CHILDREN export PHP_FCGI_MAX_REQUESTS exec /opt/local/bin/php-cgi54

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• Debian, Apache2, CGI: paths issue

  - by Bubnoff

  I have a perl form email script on the servers cgi-bin directory ( /usr/lib/cgi-bin ). /etc/apache2/sites-enabled/000-default ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> AllowOverride None Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch AddHandler cgi-script cgi pl Order allow,deny Allow from all </Directory> The issue is with paths. html calls script here: <form name="Request" method="post" action="http://server-test.local/cgi-bin/formprocessorpro.pl" onsubmit="return checkWholeForm49874(this)"> The directory with the templates and configs is passed here: <input type="hidden" name="base_path" value="../contact" /> The path to this form is: http://server-test.local/formstest/contact.htm No matter what variation I try for the base_path I get an error from the formprocessor script that it can't find the directory: An error occurred when opening the Form Configuration File (../contact/form.cfg): No such file or directory. I need to move this script from an old server, configured by a previous sysadmin, to a new server. Since cgi-bin is automatically linked to /usr/lib/cgi-bin and linked such that the script resides: http://server-test.local/cgi-bin/formprocessorpro.pl I would imagine that, given that the templates are in the webroot in a directory called contact, the correct path would be: ../contact Any ideas? It's been awhile since I've messed with CGI. Bubnoff

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• Apache2 VirtualHost on Debian not working

  - by milo5b

  I am having some problems with Apache2 configuration. I have already tried to look for documentation on the web (Apache's site, Debian's site, here on serverfault, etc), but nothing really helps. I have tried different configurations, but my current configuration is the following (/etc/apache2/sites-available/default): <VirtualHost *:80> ServerAdmin [email protected] ServerName mysite.dev ServerAlias mysite.dev DocumentRoot /var/www/mysite.dev/httpdocs/ ErrorLog ${APACHE_LOG_DIR}/error.log LogLevel warn CustomLog ${APACHE_LOG_DIR}/access.log combined </VirtualHost> <VirtualHost *:80> ServerAdmin [email protected] ServerName livesite.com ServerAlias www.livesite.com DocumentRoot /var/www/livesite.com/httpdocs/ <Directory /var/www/livesite.com/httpdocs/> Options Indexes FollowSymLinks MultiViews AllowOverride All Order allow,deny allow from all </Directory> ErrorLog ${APACHE_LOG_DIR}/error.log LogLevel warn CustomLog ${APACHE_LOG_DIR}/access.log combined </VirtualHost> mysite.dev it's just an entry in hosts file on my client machine, while livesite.com it's an actual DNS record which would resolve to the same IP as the IP set in hosts file for mysite.dev. The problem is that when i try to type mysite.dev in my browser, it would automatically go to livesite.com. I tried to have different /etc/apache2/sites-enabled/ files (/etc/apache2/sites-enabled/mysite.dev , /etc/apache2/sites-enabled/livesite.com ) - and of course with the actual sites-available related files, but achieving the same results. I have tried to have a peak on error.log and access.log but there's nothing I can see. My httpd.conf contains: AccessFileName .htaccess And I have no /etc/apache2/conf.d/virtual.conf file. Any help would be greatly appreciated - if I did not provide enough info please let me know I will do my best to provide all necessary info. Thanks

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• What privilege level is required on a Windows client workstation on an ActiveDomain to break file lo

  - by Mike Burton

  I'm not sure if I should be asking this here or on StackOverflow, but here goes: I'm part of a team maintaining a document management application, and I'm trying to figure out Windows file locking permissions. We use a utility somebody downloaded years ago called psunlock to remotely close all locks on a file. We recently discovered that this does not work across different domains on our VPN. A little bit of digging lead me to the samba manual's discussion of file locking. I still don't really "get it", though. Does anyone have any insight to share into how the process of locking and breaking locks on files works in a network context? My thinking is that privileges are required both on the file appliance and on the client workstations which hold locks. Is that accurate? Can anyone give a more specific version? Ideally I'm looking for something along the lines of A user must have privilege level X in order to break locks held from a client workstation. In practice I'd be happy with a hotlink to a good white paper on the subject.

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• Why Ubuntu could treat hosts file so strange?

  - by z4y4ts

  I have almost fresh Ubuntu desktop box. OS was installed two weeks ago and updated from karmic repositories. Last week I had no problems with DNS. But this week something had changed. I'm not sure what and when, and not sure whether I changed any configs. So now I have some really weird situation. According to logs name resolving should work normally. /etc/hosts 127.0.0.1 localhost test 127.0.1.1 desktop /etc/host.conf order hosts,bind multi on /etc/resolv.conf # Generated by NetworkManager search search servers obtained via DHCP nameserver 192.168.0.3 /etc/nsswitch.conf passwd: compat group: compat shadow: compat hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4 networks: files protocols: db files services: db files ethers: db files rpc: db files netgroup: nis But if fact it is not. user@test ~ping test PING localhost (127.0.0.1) 56(84) bytes of data. [skip] Pinging is ok. user@test ~host test test.myviacube.com has address xx.xxx.161.201 But pure I suspect that NetworkManager might cause this misbehavior, but don't know where to start to check it. Any thoughts, suggestions?

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• Xen domU passwd file overwritten with console log output

  - by malfy

  I was setting up a Debian Xen domU and after booting it fine, I added basic configuration to /etc/network/interfaces and ran /etc/init.d/networking restart. This failed so I decided to reboot. After the reboot I also ran xm shutdown box. When dropped to a shell prompt it wouldn't let me login. Upon further inspection, I now have garbage in some critical files in /etc: root@box:/# tail +1 mnt/etc/{passwd-,shadow} tail: cannot open `+1' for reading: No such file or directory ==> mnt/etc/passwd- <== 0000000000100000 (reserved) Nov 23 02:02:39 box kernel: [ 0.000000] Xen: 0000000000100000 - 0000000004000000 (usable) Nov 23 02:02:39 box kernel: [ 0.000000] DMI not present or invalid. Nov 23 02:02:39 box kernel: [ 0.000000] last_pfn = 0x4000 max_arch_pfn = 0x1000000 Nov 23 02:02:39 box kernel: [ 0.000000] initial memory mapped : 0 - 033ff000 Nov 23 02:02:39 box kernel: [ 0.000000] init_memory_mapping: 0000000000000000-0000000004000000 Nov 23 02:02:39 box kernel: [ 0.000000] NX (Execute Disable) protection: active Nov 23 02:02:39 box kernel: [ 0.000000] 0000000000 - 0004000000 page 4k Nov 23 02:02:39 box kernel: [ 0.000000] kernel direct mapping tables up to 4000000 @ 7000-2c000 Nov 23 02:02:3 ==> mnt/etc/shadow <== 32 nr_cpumask_bits:32 nr_cpu_ids:1 nr_node_ids:1 Nov 23 02:02:39 box kernel: [ 0.000000] PERCPU: Embedded 15 pages/cpu @c15b0000 s37688 r0 d23752 u65536 Nov 23 02:02:39 box kernel: [ 0.000000] pcpu-alloc: s37688 r0 d23752 u65536 alloc=16*4096 Nov 23 02:02:39 box kernel: [ 0.000000] pcpu-alloc: [0] 0 Nov 23 02:02:39 box kernel: [ 0.000000] Xen: using vcpu_info placement Nov 23 02:02:39 box kernel: [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 16160 Nov 23 02:02:39 box kernel: [ 0.000000] Kernel command line: root=/dev/mapper/xen-guest_root ro quiet root=/dev/xvda1 ro Nov 23 02:02:39 box kernel: [ 0.000000] PID hash table entries: The garbage is also present in the passwd file and the group file (although I didn't paste that above since I have since ran debootstrap on the filesystem again). Does anyone have any insight into what happened and why?

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• Ubuntu 12.04 - HP ProLiant DL380 G4 - Load Maxes Out / Unresponsive

  - by Brian S

  Trying to post this question on here. I've posted it on the Ubuntu forums as well with no replies. Recently I upgraded an HP ProLiant DL380 G4 server from Ubuntu 10.04 server to Ubuntu 12.04 server. Upon doing so, the server will not - at random times - get to a load of 400+ and then become completely non-responsive. I use an SNMP graphing program (cacti) and the load steadily increases by about 10 every five minutes until it gets over 400 and the graphing stops. The graphs may not be accurate, but the CPU load averages about 3% before this happens - and right when the load starts increasing, it jumps to about 25% for 15 minutes and dramatically dips down to less than 1% (about 0.3%) until the graphing stops. I'm not able to open a SSH tunnel to the server to do anything. I've checked the /var/log/syslog and all logging stops at that time as well - with nothing else in there. The odd thing is - the server still responds to DNS queries for the zones it is authoritative on during this time - and at normal speed. Just not sure what the next step would be in order to find out what is going on - and how this issue can be corrected. The server cannot stay with Ubuntu 10.04 Server and needs to stay upgraded.

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• Improve speed of "start menu" in Linux Mint 10 - Ubuntu 10.10 derivative

  - by Gabriel L. Oliveira

  I have a global menu (including application, administration and system tabs) that is taking too much time (for me) to load (about 2.5 seconds). Of course, this time is taken only during first start. After it have loaded, next times are better ( less than 0.2 miliseconds) The menu was taking more time before (about 5 seconds), and I found that was because of the 'Other' part of the menu, that included many applications installed with Wine, so I removed all of them (I didn't need them at all). I have a "normal" knowledge of programming, and I think that the process of starting the menu for the first time has some kind of "cache function", that tries to find which apps are present that need to be placed under menu to be shown to user. But didn't found this function so that I could analyze in details what he is doing (if searching for files under "~/.local/share/applications" or anything else). Also, I found that hitting "Alt-F2" also fires this "cache function", because after waiting it to load, the process of opening the menu took less than 0.2 miliseconds. So, could anyone help me in order to reduce this time? I found on internet that some user could reduce the time by resizing the icons of applications. But found here that most of my icons are already at 25x25 size. Any other idead? Maybe a multiprocess to load it, or include it under startup... don't know. Ps: Sorry if this is an awkward question, but I just do not like waiting for things to happen, and think that this process should be smoother than it's now. Also, thanks in advance!

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• [Word2007] How to showing "only number" in picture cross-reference

  - by kornelijepetak

  I have many pictures in a document and I reference them very often in text. I don't want to lose the order so I am using Insert - Cross-reference. This opens the cross-reference dialog where I can set Reference type to Picture. For "Insert reference to", there are 5 choices: - Entire caption - List item - Only label and number - Only caption text - Page number, Above/below What I need is a reference that would be inserted like this: [4], and not like this: [Picture 4]; None of these options enable me to do it. Is there any way to make Word 2007 insert a reference to only Caption Number? Note: The document is written in Croatian language which has 7 declension cases, so using "Picture 4" would not be valid in all cases. Actually caption label Picture is set to croatian word "Slika" and when I need to say say "in the picture" I can't because it would be "na Slici 5." and not "na Slika 5." (like Word would make me do). That's why I need to reference only the caption number. Is that possible in Word 2007?

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• Using 1and1.com Servers, SMTP Mail is Limited - Local XAMPP Server Works As Expected

  - by nicorellius

  I'm starting to not like 1and1.com that much. I've used them for years, but mainly for simple sites without much need for configuration. I know there are better hosting companies out and I may go seeking them. The problem here is that on my Local XAMPP server (sitting on a network with Comcast ISP), I have a PHP script that uses PEAR::Mail to send mail using MIME. The script works find locally with either smtp.1and1.com and corresponding credentials and smtp.gmail.com with corresponding credentials, using appropriate ports, etc. 1and1 tells me that I have to change the MX record on the domain where this script runs in order to make this work. This doesn't make sense to me. Now I'm pretty new to all this, but how is it that this is the case? Why can my local server work just fine, out of the box, but their servers not? I have asked them these questions, but they are very vague and I cannot get any good answers from them. Versions: PEAR Version: 1.5.0 PHP Version: 4.4.9 Zend Engine Version: 1.3.0 My apologies in advance for my ignorance. Thanks for the help in advance.

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• Performance monitoring on Linux/Unix

  - by ervingsb

  I run a few Windows servers and (Debian and Ubuntu) Linux and AIX servers. I would like to continously monitor performance on these systems in order to easily identify bottlenecks as well as to have an overview of the general activity on the servers. On Windows, I use Windows Performance Monitor (perfmon) for this. I set up these counters: For bottlenecks: Processor utilization : System\Processor Queue Length Memory utilization : Memory\Pages Input/Sec Disk Utilization : PhysicalDisk\Current Disk Queue Length\driveletter Network problems: Network Interface\Output Queue Length\nic name For general activity: Processor utilization : Processor\% Processor Time_Total Memory utilization : Process\Working Set_Total (or per specific process) Memory utilization : Memory\Available MBytes Disk Utilization : PhysicalDisk\Bytes/sec_Total (or per process) Network Utilization : Network Interface\Bytes Total/Sec\nic name (More information on the choice of these counters on: http://itcookbook.net/blog/windows-perfmon-top-ten-counters ) This works really well. It allows me to look in one place and identify most common bottlenecks. So my question is, how can I do something equivalent (or just very similar) on Linux servers? I have looked a bit on nmon (http://www.ibm.com/developerworks/aix/library/au-analyze_aix/) which is a free performance monitoring tool developed for AIX but also availble for Linux. However, I am not sure if nmon allows me to set up the above counters. Maybe it is because Linux and AIX does not allow monitoring these exact same measures. Is so, which ones should I choose and why? If nmon is not the tool to use for this, then what do you recommend?

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• Xen PV packet loss

  - by Delphinator

  I'm having some serious issues with packetloss with one of my servers. This server is a somewhat old (P4-era) machine running Debian Squeeze and Xen 4.0. There are two domUs running on it (both also Debian Squeeze), one gateway and a fileserver. Unfortunatly the processor has no virtualization extensions, therefore only PV can be used. While investigating why our network seems to be slower than it should I found some pretty bad packet loss (~25%). After further investigation and several experiments I did a measurment between the dom0 and one of the domUs: Server listening on UDP port 5001 Receiving 1470 byte datagrams UDP buffer size: 110 KByte (default) ------------------------------------------------------------ ------------------------------------------------------------ Client connecting to dom0, UDP port 5001 Sending 1470 byte datagrams UDP buffer size: 110 KByte (default) ------------------------------------------------------------ [ 3] local 192.168.1.2(domU) port 33817 connected with 192.168.1.100(dom0) port 5001 [ 4] local 192.168.1.2(domU) port 5001 connected with 192.168.1.100(dom0) port 48606 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 46.3 MBytes 38.7 Mbits/sec [ 3] Sent 33020 datagrams [ 3] Server Report: [ 3] 0.0-10.0 sec 46.2 MBytes 38.6 Mbits/sec 0.030 ms 89/33019 (0.27%) [ 3] 0.0-10.0 sec 1 datagrams received out-of-order [ 4] 0.0-10.2 sec 43.0 MBytes 35.3 Mbits/sec 13.074 ms 11575/42256 (27%) tl;dr: 27% packet loss from dom0 to domU with 50Mbit UDP packets. Same thing happens from anywhere in the network. The problem gets better for smaller bandwidths (0.047% for 5Mbit) and worse for higher (59% for 200Mbit) ones. I did increase the CPU-weight of the dom0, there is no swapping going on, and actual networking-hardware is not involved. I never expected Xen (or anything related) to drop packets, and I'm completly clueless what to try next.

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• How can I make the Windows 7 taskbar behave like a cross between the old Quick Launch and new Superbar?

  - by frumious

  I really like the taskbar in Windows 7, I think combining buttons to launch apps and the icons that show your running apps is groovy. However, because I like having as much space as possible, I've got small icons enabled and shrunk the bar down to one row. I've also told it not to group the running apps unless there's no space left (to save me having to work harder to find the particular window I want), which also means that they have captions, and are thus quite wide. The (admittedly small) problem this gives me is that I can pin all my favourite apps to the bar, which looks much like the old Quick Launch bar, but when I launch them the running apps because much wider, and the unlaunched apps get lost amongst them. I can manually change the order to fix this, but next time I'll launch a different app and I'll be back to square one. What I'd prefer is for small unlaunched icons to be kept on the left, and wider running apps to move over to the right, which for me would be the best of both worlds. Is there any way I can organise that? I'm aware that one can use the traditional quick launch bar in Windows 7, but that's not what I'm after; I generally prefer the Windows 7 way.

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• simple apache2 reverse proxy setup not working

  - by Nick

  I know what proxy is (very high level), it's just I have never set up one, and it feels like I might be missing some big fat point here. My setup: client server (static IP), runs apache on port 80 proxy (has 2 network cards, one is on the clients network, the other one with a static IP on the server network), runs apache on port 80 I am trying to configure these three machines so that when client requests: http://proxy/machine1 It gets served server's pages at server root URL, i.e. http://server/ I can access client pages just fine. However, when I try accessing a page from the client machine, it simply gets redirected to server's IP address, which it clearly can't access since they are not on the same network: ... <meta http-equiv="REFRESH" content="0;url=http://server/machine1"></meta> <title>Redirect</title> ... My apache2 config is: LoadModule proxy_module /modules/mod_proxy.so LoadModule proxy_http_module /modules/mod_proxy_http.so ProxyRequests off <Proxy *> Order Allow,Deny Allow from all </Proxy> ProxyPass /machine1 http://server:80 <Location /machine1> ProxyPassReverse / </Location> What gives? Thanks!

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• IIS URl Rewrite working inconsistently?

  - by Don Jones

  I'm having some oddness with the URL rewriting in IIS 7. Here's my Web.config (below). You'll see "imported rule 3," which grabs attempts to access /sitemap.xml and redirects them to /sitemap/index. That rule works great. Right below it is imported rule 4, which grabs attempts to access /wlwmanifest.xml and redirects them to /mwapi/wlwmanifest. That rule does NOT work. (BTW, I do know it's "rewriting" not "redirecting" - that's what I want). So... why would two identically-configured rules not work the same way? Order makes no different; Imported Rule 4 doesn't work even if it's in the first position. Thanks for any advice! EDIT: Let me represent the rules in .htaccess format so they don't get eaten :) RewriteEngine On # skip existing files and folders RewriteCond %{REQUEST_FILENAME} -s [OR] RewriteCond %{REQUEST_FILENAME} -l [OR] RewriteCond %{REQUEST_FILENAME} -d RewriteRule ^.*$ - [NC,L] # get special XML files RewriteRule ^(.*)sitemap.xml$ /sitemap/index [NC] RewriteRule ^(.*)wlwmanifest.xml$ /mwapi/index [NC] # send everything to index RewriteRule ^.*$ index.php [NC,L] The "sitemap" rewrite rule works fine; the 'wlwmanifest' rule returns a "not found." Weird.

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• Why apache throws 403 on index file after install?

  - by den-javamaniac

  Hi. I've just installed apache and php from sources using next commands: ./configure --prefix="/mnt/workspace/servers/web/apache-2.2.17" \ --enable-info --enable-rewrite --enable-usertrack --enable-mime-magic for apache and ./configure --with-apxs2=/mnt/workspace/servers/web/apache-2.2.17/bin/apxs \ --prefix=/mnt/workspace/servers/web/apache-2.2.17/php \ --with-config-file-path=/mnt/workspace/servers/web/apache-2.2.17/php \ --with-mysql=mysqlnd for php. After adjusting configuration (httpd.conf) and starting apache it gives a 403 response on http://localhost:8060/index.html (presuming that 8060 is used) request. There are next directory settings in httpd.conf: <Directory "/mnt/workspace/servers/web/apache-2.2.17/htdocs"> ... Order allow,deny Allow from all ... </Directory> <IfModule dir_module> DirectoryIndex index.html index.php </IfModule> It should be noted that I've got apache on a mounted (default auto mount configured while installing ubuntu) partition. Log Files Access log: ::1 - - [12/Feb/2011:17:48:30 +0200] "GET / HTTP/1.1" 403 202 ::1 - - [12/Feb/2011:17:48:31 +0200] "GET /favicon.ico HTTP/1.1" 403 213 ::1 - - [12/Feb/2011:17:48:48 +0200] "GET /index.html HTTP/1.1" 403 212 ::1 - - [12/Feb/2011:17:48:48 +0200] "GET /favicon.ico HTTP/1.1" 403 213 ::1 - - [12/Feb/2011:17:49:03 +0200] "GET /index.html HTTP/1.1" 403 212 ::1 - - [12/Feb/2011:17:49:03 +0200] "GET /favicon.ico HTTP/1.1" 403 213 Error log: [Sat Feb 12 18:59:13 2011] [notice] Apache/2.2.17 (Unix) PHP/5.3.5 configured -- resuming normal operations [Sat Feb 12 18:59:22 2011] [error] [client ::1] (13)Permission denied: access to / denied [Sat Feb 12 18:59:22 2011] [error] [client ::1] (13)Permission denied: access to /favicon.ico denied [Sat Feb 12 18:59:36 2011] [error] [client ::1] (13)Permission denied: access to /index.html denied

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• Why am I unable to reach local network computers, but able to browse the web?

  - by Igor Zinov'yev

  I have a weird problem. Today after turning my Ubuntu 9.10 PC on I can't connect to my local network, but I can use the Internet. We have a single Windows 2003 server machine that acts as a local main DNS server, DHCP server and a domain controller. Although it seems to give me the local IP address, I can not ping it, as well as any other machine on the net. I have tried all of the below and it didn't help: Rebooting; Reconnecting to the network; Forcing the dhclient to renew the IP address; Deleting and creating new connection profiles; Plugging my machine into another network outlet; Maybe it has something to do with routing, because I have tampered with routing tables the day before, but the tables seem ok to me: $ route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.0.0 0.0.0.0 255.255.255.0 U 1 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 vboxnet0 0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0 Our LAN uses a D-Link DI-604 router, and it looks to me as if I am connected to the network outside the router. I can not even access its administration page. Please at least suggest what I can do to solve this. P.S. What seems strangest to me is that I can access the PC in question from outside the network by opening a port on the router. I have managed to ssh to it from outside, but I still can't ping nothing on the inside. P.P.S Today I tried reinstalling network-manager with --purge option, but it did no good. After that I created a new DCHP reservation for my PC in order to change my local IP, but that didn't change anything either. My PC is able to get a DHCP offer, but then it's unable to connect to any local computers. I am desperate.

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• Optimize apache for 10K+ wordpress views a day on 2GB RAM E6500 CPU

  - by Broke artist

  I have a dedicated server with apache/php on ubuntu serving my Wordpress blog with about 10K+ pageviews a day. I have W3TC plug in installed with APC. But every now and then server stop responding or goes dead slow and i have to restart apache to get it back. Heres my config what am i doing wrong? ServerRoot "/etc/apache2" LockFile /var/lock/apache2/accept.lock PidFile ${APACHE_PID_FILE} TimeOut 40 KeepAlive on MaxKeepAliveRequests 200 KeepAliveTimeout 2 StartServers 5 MinSpareServers 5 MaxSpareServers 8 ServerLimit 80 MaxClients 80 MaxRequestsPerChild 1000 StartServers 3 MinSpareServers 3 MaxSpareServers 3 ServerLimit 80 MaxClients 80 MaxRequestsPerChild 1000 StartServers 3 MinSpareServers 3 MaxSpareServers 3 ServerLimit 80 MaxClients 80 MaxRequestsPerChild 1000 User ${APACHE_RUN_USER} Group ${APACHE_RUN_GROUP} AccessFileName .htaccess Order allow,deny Deny from all Satisfy all DefaultType text/plain HostnameLookups Off ErrorLog /var/log/apache2/error.log LogLevel error Include /etc/apache2/mods-enabled/.load Include /etc/apache2/mods-enabled/.conf Include /etc/apache2/httpd.conf Include /etc/apache2/ports.conf LogFormat "%v:%p %h %l %u %t \"%r\" %s %O \"%{Referer}i\" \"%{User-Agent}i\"" vhost_combined LogFormat "%h %l %u %t \"%r\" %s %O \"%{Referer}i\" \"%{User-Agent}i\"" combined LogFormat "%h %l %u %t \"%r\" %s %O" common LogFormat "%{Referer}i - %U" referer LogFormat "%{User-agent}i" agent CustomLog /var/log/apache2/other_vhosts_access.log vhost_combined Include /etc/apache2/conf.d/ Include /etc/apache2/sites-enabled/

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• Bad font anti-aliasing in Ubuntu

  - by Juliano

  I'm switching from Fedora 8 to Ubuntu 9.04, and I can't seem to get it to get a good font anti-aliasing to work. It seems that Ubuntu's fontconfig tries to keep characters in integral pixel widths. This makes text more difficult to read, when 1 pixel is too thin and 2 pixels is too thick. Check the image below. In Fedora, when fontconfig anti-aliasing is enabled, fonts have their thickness proportional to the font size. Below, the thickness is different for 8, 9 and 10pt sizes. In Ubuntu, on the other hand, even when anti-aliasing is enabled, all 8, 9 and 10pt sizes have 1 pixel thickness. This makes reading larges amount of text difficult. I'm using the very same home directory, and I already checked that X resources are the same in both systems: ~% xrdb -query | grep Xft Xft.antialias: 1 Xft.dpi: 96 Xft.hinting: 1 Xft.hintstyle: hintfull Xft.rgba: none GNOME settings: ~% gconftool-2 -a /desktop/gnome/font_rendering antialiasing = grayscale hinting = full dpi = 96 rgba_order = rgb So, the question is: What should I change in the new box (Ubuntu) in order to get anti-aliasing like in the old box (Fedora)?

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