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• "Run As Administrator" on program right click failing and not launching program

  - by GONeale

  This problem lies within a relatively fresh x64 Windows 7 install ~4 weeks, but is also a problem I have seen on Windows Vista machines (x86 versions). Since the other day, any programs attempted to be launched via right clicking on a shortcut (.lnk)'s context menu and pressing - "Run As Administrator" for instance, in the Quick Launch/Jump List in Windows 7 has failed, screen has not dimmed, no UAC popup. In fact the program does not even load. There is no way around this unless I use the shortcut version from "All Programs" which appears to work, very strange? I have performed no major software installs, nothing out of the ordinary. Has anybody encountered this or know what would be causing it? Here's an example of somebody else experiencing this problem in Vista with no solution: http://www.vistax64.com/vista-general/131918-strange-run-administrator-problem.html and I believe this problem is related, I also cannot right click - "Manage" on my computer): http://windows7forums.com/windows-7-support/5501-run-administrator-broken.html I am running the latest version of Avira AntiVir Virus Scanner and pretty concious of what I download, I don't think it is a virus, nor do I believe it is due to the RC Version of Windows 7, because I have seen the problem across multiple Operating Systems versions. Thanks guys.

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• 550 Forged HELO with postfix on debian lenny

  - by Martin Ahrer

  I'm running postfix on a debian lenny system. sending mail in general works without any problems. however some recipent mail systems return an error and I can't get a clue what is causing the problem. So far I suspect that this is either postfix setup itself or the reverse dns resolution. The mail server is running on a virtual server from my service provider. running the command hostname is returning my.domain however running host <ip-address> is returning some alias from the virtual server system. now i'm not quite sure if that is causing my problem???? The mail system <recipient-mail>: host mx0.recipient.domain[xxx.xxx.xxx.xxx] refused to talk to me: 550 Forged HELO: you are not my.domain Reporting-MTA: dns; my.domain X-Postfix-Queue-ID: 6A1135B08002 X-Postfix-Sender: rfc822; [email protected] Arrival-Date: Tue, 13 Apr 2010 17:50:36 +0200 (CEST) Final-Recipient: rfc822; recipient-mail Action: failed Status: 5.0.0 Remote-MTA: dns; mx0.recipient.domain Diagnostic-Code: smtp; 550 Forged HELO: you are not my.domain

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• Group Policy GPO not 'seen' at client

  - by fukawi2

  I have a new OU (natorg.local\NATO\Users) that I am trying to apply GP to. I have created a new user in this OU, and linked the 3 GPO's to this OU: DESKTOP - Folder Redirection (AppData) DESKTOP - Folder Redirection (Desktop) DESKTOP - Folder Redirection (Documents) Hopefully the names are sufficient to suggest what they do exactly. The settings are under User Settings so there is no Loopback processing required (if my understanding is correct). GP Modelling for the user and specific computer says that the GPOs will/should be applied, however on the client, gpresult doesn't even appear to see the GPOs under either "Applied" or "Not Applied": USER SETTINGS -------------- CN=Amir,OU=Users,OU=NATO,DC=natorg,DC=local Last time Group Policy was applied: 25/06/2012 at 11:07:13 AM Group Policy was applied from: svr-addc-01.natorg.local Group Policy slow link threshold: 500 kbps Applied Group Policy Objects ----------------------------- LAPTOPS - Power Settings WSUS - Set Server Address OUTLOOK - Auto Archive SECURITY - Lock Screen After Idle Default Domain Policy DESKTOP - Regional Settings NETWORK - Proxy Configuration NETWORK - IE General Config OFFICE - Trusted Locations OFFICE - Increase Privacy OUTLOOK - Disable Junk Filter DESKTOP - Disable Windows Error Reporting DESKTOP - Hide Language Bar NETWORK - Disable Skype DESKTOP - Disable Thumbs.db Creation WSUS - Set Server Address The following GPOs were not applied because they were filtered out ------------------------------------------------------------------- Local Group Policy Filtering: Not Applied (Empty) NETWORK - Google Chrome Configuration Filtering: Not Applied (Empty) SYSTEM - Event Log Configuration Filtering: Not Applied (Empty) SECURITY - Local Administrator Password Filtering: Not Applied (Empty) NETWORK - Disable Windows Messenger Filtering: Not Applied (Empty) SECURITY - Audit Policy Filtering: Not Applied (Empty) WSUS - Automatic Install Filtering: Not Applied (Empty) NETWORK - Firewall Configuration Filtering: Not Applied (Empty) DESKTOP - Enable Offline Files Filtering: Not Applied (Empty) I haven't altered permissions on the GPO's at all, no WMI filtering... As I said, GP Modelling says that they should be applied. GPResult on the client correctly identifies itself as being the correct OU (CN=Amir,OU=Users,OU=NATO,DC=natorg,DC=local) There are 2 x 2008R2 and a 2003 DC, domain is 2003 level, client is Windows XP SP3. Can anyone suggest why these GP Objects would be "invisible" to the client?

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• Problems with ipsec betwen Cisco ASA 5505 and Juniper ssg5

  - by Oskar Kjellin

  I am trying to set up an ipsec tunnel between our ASA 5505 and a Juniper ssg5. The tunnel is up and running, but I cannot get any data through it. The local network I am on is 172.16.1.0 and the remote is 192.168.70.0. But I cannot ping anything on their netowork. I receive a "Phase 2 OK" when I set up the ipsec. I think this is the part of the config that is applicable. It seems like the data is not routed through the tunnel, but I am not sure... object network our-network subnet 172.16.1.0 255.255.255.0 object network their-network subnet 192.168.70.0 255.255.255.0 access-list outside_cryptomap extended permit ip object our-network object their-network crypto ipsec ikev1 transform-set ESP-3DES-SHA esp-3des esp-sha-hmac crypto map outside_map 1 match address outside_cryptomap crypto map outside_map 1 set pfs crypto map outside_map 1 set peer THEIR_IP crypto map outside_map 1 set ikev1 phase1-mode aggressive crypto map outside_map 1 set ikev1 transform-set ESP-3DES-MD5 crypto map outside_map 1 set ikev2 pre-shared-key ***** crypto map outside_map 1 set reverse-route crypto map outside_map interface outside webvpn group-policy GroupPolicy_THEIR_IP internal group-policy GroupPolicy_THEIR_IP attributes vpn-filter value outside_cryptomap ipv6-vpn-filter none vpn-tunnel-protocol ikev1 tunnel-group THEIR_IP type ipsec-l2l tunnel-group THEIR_IP general-attributes default-group-policy GroupPolicy_THEIR_IP tunnel-group THEIR_IP ipsec-attributes ikev1 pre-shared-key ***** ikev2 remote-authentication pre-shared-key ***** ikev2 local-authentication pre-shared-key *****

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• Gentoo Linux useful utilities

  - by Alakdae

  I want to make a list of utilities that come in handy in Gentoo (general Linux tools available in all distributions also appreciated). What tools and commands do you use and consider helpful in administration of a Gentoo server? I will update the list with command from answers from time to time. eclean Utility for cleaning distfiles and binary packages. Usage example: eclean distfiles Usage example output: Cleans out the files in /usr/portage/distfiles. Pretty handy. Package: app-portage/gentoolkit eix Very useful tool for getting information about a package. Similar to "emerge -s" but much faster and more precise. Usage example: eix gentoolkit Usage example output: Show information about package such as: available versions, masked versions, installed versions and description. Package: app-portage/eix eix-test-obsolete Check system for obsolete, redundant, uninstalled entries in package.keywords, package.mask, package.unmask, package.use and package.cflags Usage example: eix-test-obsolete Usage example output: Shows non-matching entries, redundant entries, and uninstalled entries. Package: app-portage/eix equery Another very useful tool for getting information about packages (listing package files, checking which files belong to which package and much more) Usage example: equery b emerge Usage example output: Show which packages installed a file called emerge Package: app-portage/gentoolkit genlop Utility for extracting information about emerged ebuilds Usage example: genlop -l --date yesterday Usage example output: Show a list of packages that have been emerged yesterdayPackage: app-portage/genlop glsa-check Checks system if it's affected by GLSAs (security issues) Usage example: glsa-check -l affected Usage example output: List of GLSA that the system is affected by. Package: app-portage/gentoolkit rc-update Utility for managing (adding, deleting) runlevel scripts. Usage example: rc-update add syslog-ng default Usage example output: Adds syslog-ng to default runlevel. Package: sys-apps/baselayout revdep-rebuild Scans libraries and binaries for missing shared library dependencies Usage example: revdep-rebuild Usage example output: Gather binaries and libraries information, check for dependencies, rebuild packages with missing dependencies Package: app-portage/gentoolkit

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• Routing WIFI and LAN for specific traffic

  - by jakebird451

  I have two network devices aboard my macbook pro: WIFI (en1): Used for general traffic. Connects to an ip of 192.168.19.* via DHCP LAN (en0): Used for specific traffic. Connects to an ip of 192.168.2.10 as a static IP. Does not connect to a router, only a switch for direct routing connection. I have 4 IP addresses I need to access on the LAN: 192.168.2.1 192.168.2.21 192.168.2.20 192.168.2.30 The rest of the traffic needs to go to WIFI. I have tried setting up a routing table for the specific ip addresses, but I only managed to mess up my network. I do not venture out into the world of networking too often, but this was the latest command I have been trying: sudo route add -host 192.168.2.30 -interface en0 This command killed my ability to use ping. It told me that ping could not allocate memory (is that even possible)? It also killed my wifi access. Logging out and back in fixed the issue. I really do not mind to make this solution permanent, so I am fine with a temporary routing. EDIT: If I currently have been trying: sudo route flush sudo route add default 192.168.19.1 This gets everything to work for about a minute. But after such minute it "forgets" the routing to WiFi while retaining LAN's (en0) routing. If I unplug and replug my LAN (en0) cable, the process works for another minute.

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• Server 2008 R2 DNS Lockup / Stops Resolving Internet Names

  - by Richard Maynard

  We've deployed our first 2008 R2 server on a client site which has replaced their existing 2003 DC. This server provides DNS resolution services to all client machines on that site for general internet usage. Since using the 2008 R2 DNS services we have noticed every couple of days the DNS server starts timing out when requests to certain sites are made (google is the only example I can provide at this time although it seems to be larger sites with problems rather than small - CDN compatiblity issue?). When you restart the DNS Server service then resolution returns to normal... just only for a day or so. Is anybody aware of any significant changes to the DNS server architecture or configuration out of the box in R2 that may explain this intermittent behaviour? I have already tried the fix listed here to no avail: http://weblogs.asp.net/owscott/archive/2009/09/15/windows-server-2008-r2-dns-issues.aspx The following PS command prompt info illustrates the issue: PS C:\Users\Administrator.UK> nslookup Default Server: s8209001.uk.kingdomfaith.com Address: 10.1.3.4 > www.google.com Server: s8209001.uk.kingdomfaith.com Address: 10.1.3.4 Non-authoritative answer: Name: www.l.google.com Addresses: 66.102.9.99 66.102.9.104 66.102.9.105 66.102.9.103 66.102.9.147 Aliases: www.google.com > www.google.co.uk Server: s8209001.uk.kingdomfaith.com Address: 10.1.3.4 * s8209001.uk.kingdomfaith.com can't find www.google.co.uk: Server failed

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• Windows roaming profile when creating a new user profile

  - by molecule

  Hi all, When a particular user is having a lot of problems with Windows XP e.g. applications crashing, unresponsive applications (which used to work), and as a general troubleshooting practice for a domain user, I normally rename that user's old profile and get him/her to logon to create a "fresh" profile (on the same PC). More often than not, this will solve the problem albeit some reconfiguration i.e. Outlook, Excel add-ins etc. As I took over the systems admin role from another administrator, I would like to know what is the easiest way to find out (either through a third party or some Windows administrative tool) what settings are carried over if the profile is a Roaming Profile. I tested creating a new user profile for one of my users and it seems basic Outlook settings such as the user's mailbox and PSTs are carried over automatically when I create a new user profile. I suspect this is done through a batch file loaded as part of the login script. However, my knowledge of scripting is limited and I don't want any corruptions to be carried over to the new profile. Can someone share their experiences on this? Thanks in advance.

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• Logitech webcam device only recognised by one software, without drivers

  - by Ben Franchuk

  A couple weeks ago I purchased a Logitech webcam at a garage sale; It did not come with any driver DVDs or anything like that. I plugged it in, turned on my computer, and continued work as usual. I did not at the time (and still have not) gotten any drivers for the device. Recently, though, I started up an audio software named as Cubase, only to find that it was picking up audio reads off of... something. I checked my sound card, and everything else plugged into my computer, but couldn't find where in the world this audio was being picked up from. There were no microphones listed in the device managers, and no "unknown devices" or whatever. Everything seemed as it always was. Running out of ideas, i blew an air-horn directly into the general area of the webcam, located directly in front of me. Sure enough, the audio peaked, indicating that the microphone was definitely in the webcam and that Cubase was somehow picking up this audio, even without drivers. The software lists the device as a "Universal USB Microphone". Adobe Audition, Soundbooth, and other audio applications cannot find the device either. Why is it that this one software (Cubase) can use this device without a driver, while every other piece of software on the computer can't? Not even the operating system can recognize it. Windows 7 Professional x64 bit

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• GRE Tunnel over IPsec with Loopback

  - by Alek

  I'm having a really hard time trying to estabilish a VPN connection using a GRE over IPsec tunnel. The problem is that it involves some sort of "loopback" connection which I don't understand -- let alone be able to configure --, and the only help I could find is related to configuring Cisco routers. My network is composed of a router and a single host running Debian Linux. My task is to create a GRE tunnel over an IPsec infrastructure, which is particularly intended to route multicast traffic between my network, which I am allowed to configure, and a remote network, for which I only bear a form containing some setup information (IP addresses and phase information for IPsec). For now it suffices to estabilish a communication between this single host and the remote network, but in the future it will be desirable for the traffic to be routed to other machines on my network. As I said this GRE tunnel involves a "loopback" connection which I have no idea of how to configure. From my previous understanding, a loopback connection is simply a local pseudo-device used mostly for testing purposes, but in this context it might be something more specific that I do not have the knowledge of. I have managed to properly estabilish the IPsec communication using racoon and ipsec-tools, and I believe I'm familiar with the creation of tunnels and addition of addresses to interfaces using ip, so the focus is on the GRE step. The worst part is that the remote peers do not respond to ping requests and the debugging of the general setup is very difficult due to the encrypted nature of the traffic. There are two pairs of IP addresses involved: one pair for the GRE tunnel peer-to-peer connection and one pair for the "loopback" part. There is also an IP range involved, which is supposed to be the final IP addresses for the hosts inside the VPN. My question is: how (or if) can this setup be done? Do I need some special software or another daemon, or does the Linux kernel handle every aspect of the GRE/IPsec tunneling? Please inform me if any extra information could be useful. Any help is greatly appreciated.

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• high virtual memory usage in openvz?

  - by freedrull

  We're having a lot of memory problems on a new OpenVZ box. It is supposed to have 1 gig of memory, I'm not sure how much of that is burstable or guaranteed memory. Programs in general seem to take up more virtual memory than they do on my box at home, and on our other OpenVZ box. I wrote this simple C program: #include <stdio.h> #include <stdlib.h> int main(){ char *thingy = malloc(500); getchar(): return 0; } So it simply allocates 500 bytes and then returns. I ran the program on 3 computers. On my home machine, and our other OpenVZ box it shows about 1k bytes of virtual memory being used. On the new problematic machine its about 3k. I know this is just virtual memory and not resident memory, but why is this machine allocating so much virtual memory? Are there some settings I need to adjust to the OpenVZ memory settings? I tried changing the stack size with ulimit -s 256 and restarting some demons, but I still saw the same results. I'm doing all of my monitoring with htop, is this even a good program to use with a OpenVZ vps? I've read I should be parsing the output of /proc/user_beancounters intead or something.

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• Windows roaming profile when creating a new Windows profile

  - by molecule

  Hi all, When a particular user is having a lot of problems with Windows XP e.g. applications crashing, unresponsive applications (which used to work), and as a general troubleshooting practice for a domain user, I normally rename that user's old profile and get him/her to logon to create a "fresh" profile (on the same PC). More often than not, this will solve the problem albeit some reconfiguration i.e. Outlook, Excel add-ins etc. As I took over the systems admin role from another administrator, I would like to know what is the easiest way to find out (either through a third party or some Windows administrative tool) what settings are carried over if the profile is a Roaming Profile. I tested creating a new user profile for one of my users and it seems basic Outlook settings such as the user's mailbox and PSTs are carried over automatically when I create a new user profile. I suspect this is done through a batch file loaded as part of the login script. However, my knowledge of scripting is limited and I don't want any corruptions to be carried over to the new profile. Can someone share their experiences on this? Thanks in advance.

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• How to direct reverse proxy requests using wildcard vhosts

  - by HonoredMule

  I'm interested in running a reverse proxy with 2-3 virtual machines behind it. Each internal server will run multiple virtual hosts, and rather than manually configuring each individual vhost on the proxy (a variety of vhosts come and go too often for this to be practical), I would like to use something which can employ pattern matching in a sequential order to find the appropriate back-end server. For example: Server 1: *.dev.mysite.com Server 2: *.stage.mysite.com Server 3: *.mysite.com, dev.mysite.com, stage.mysite.com, mysite.com Server 4: * In the above configuration, task.dev.mysite.com would go to Server 1, dev.mysite.com would go to Server 3, yoursite.stage.mysite.com to Server 2, www.mysite.com to Server 3, and yoursite.com to Server 4. I've looked into using Squid, Varnish, and nginx so far. I have my opinions regarding their respective desirability and general suitability, but it's not readily apparent if any of them can handle dynamic server selection in this manner and not require per-vhost configuration. Apache on the other hand can do this handily and simply, but otherwise (aside from being well-known and familiar) seems very poorly suited to the partly-performance-serving task. Performance isn't actually a major concern yet, but it seems foolish to use Apache if another system will perform far better and can also handle the desired 'hands-free' configuration. But so is frequently having to adjust the gateway for all production services and risk network-wide outage...and so also is setting oneself up for longer downtime later if Apache becomes a too-small bottleneck. Which of these (or other) reverse proxies can do it/would do it best? And maybe I should post this as a separate question, but if Apache is the only practical option, how safe/reliable/predictable is apache-mpm-event in apache2.2 (Ubuntu 12.04.1) particularly for a dedicated reverse proxy? As I understand it the Event MPM was declared "safe" as of 2.4 but it's unclear whether reaching stability in 2.4 has any implications for the older (2.2) versions available in official/stable package channels of various distros.

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• Troubleshooting iptables and configuring it to drop the priority of long-term connections

  - by intuited

  I'm somewhat familiar with the general concepts of iptables, and would like to learn it in more detail. I'm hoping that my learning experience can also be useful. The situation: I'm running dd-wrt on my router. Despite its purported QoS skills, I'm still seeing connection latency shoot up hugely whenever there's an ongoing http connection, eg some large download. Under such conditions, it can take 10 seconds or more to load a basic webpage; sometimes the connections are dropped entirely. I've tried adjusting the parameters, dropping the allotted bandwidth for up and download to well under my limit, but nothing seems to work. dd-wrt is configured to use HTB as the QoS algorithm; HFSC, although presented as an option, seems to cause the router to crash, and is rumoured to not actually work on any linux system. I'd like to be able to troubleshoot this issue and hopefully improve the settings that dd-wrt is using, but I'm finding the learning curve a bit overwhelming. For starters I am not sure what HTB actually specifies: is this a set of iptables commands, or do some of those commands specify how HTB is to be used? I would like it to prioritize based on protocol the way that it already supposed to, and in addition I'd like to have it drop the priority of connections which have a high total byte count, say over 400KB. Also tips on utilities that can be run under dd-wrt to get more info on what's going on in there are appreciated. I've tried to get iftop to work but there were issues running curses. I'm leaning towards replacing dd-wrt with openwrt; comments on this strategy are also welcome. I suspect that I would be well advised to get a second router as a standin before trying that. It may be worth noting that my total bandwidth is pretty limited (256Kbit/s).

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• AWS Application - Subscription Payments Scheduled but Not Initializing

  - by nicorellius

  I briefly browsed the AWS forums but these are not nearly as easy to use and efficient as Stack Exchange derived ones, so here I am... the company I work for has an app on the AWS cloud. In general the app works well. However, since it is new, we haven't had many customers and the ones who signed up are now coming to the point where their subscriptions to our service should be renewed. In comes my question. When I query the database for payment status of certain subscriptions using the console, I get what I would expect: Instrument XYZ is on a Monthly subscription (subscription=xxxyyyzz). The subscription is active with an expiration date of 19 Apr 2010 10:43 Z The payment token will expire on 1 Dec 2012 12:00 Z There are xy runs remaining. The subscription fee of $XX.xx will be charged on 17 Apr 2010 10:43 Z OK, this is great. According to this, I would expect the next payment to be initiated on 17 Apr. The reason I am asking is because for a different user last month I got this same output but the payment never went through, i.e., was not initiated through Amazon payments. The user didn't see the payment go through and neither did we. It should be noted that the initial payments were received. The sign up process works and if the user goes to "pay" from within our app, they will be directed to https://payments.amazon.com to make their payment. Any ideas?

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• Ubuntu 13.10 on Acer V5-472 with HD 4000

  - by Hyperboreus

  I have an Acer V5-472 with intel HD4000 graphics chipset and a built-in 1366*768 display. I have installed ubuntu 13.10 amd64 in legacy boot mode with an external monitor. Installation showed no problems, I can boot from HDD and log into my system. The internal display doesn't work and I have to use an external monitor. I have tried the following (found in other threads) to no avail: Setting grub option "acpi_backlight=vendor" or "acpi_osi=Linux" or both. Installing the intel HD drivers for Linux from their homepage. Running in circles, screaming and shouting. The internal display lights up (I can change the brightness with Fn-Left and Fn-Right) but that's all. When I boot, I get a purple splash screen and from then only the external monitor works. I read somewhere that this might be a problem with kernel 3.11? Has anybody ubuntu running on an Acer V5-472? Should I change ubuntu version or use 32-bit instead? In general, how can I get the internal display to work? Edit: The settings-display dialogue shows the internal display correctly with supported resolution of 1366.

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• Apache2, Tomcat6, and proxy redirects

  - by Randal Hale

  So here is my question - go easy and slow. I'm a GIS Consultant and general hack with linux. I inherited this volunteer job essentially because I knew more than the rest of the team - or the rest of the team isn't as stubborn as I am... With that said a number of people have been mucking around in the server before I got involved so I've been cleaning up a lot of things. The domain names have been changed to protect the innocent. I have a server running Apache2 (port 80) and tomcat6 (8080) running on ubuntu server 10.4. There is a virtual host on Apache2 called "Runner" (the domain is runner.org). I have mod_proxy loaded. I am trying to redirect everyone that visits runner.org to http://some.ip.address:8080/openrunner-webapp/ So far I've gotten runner.org assigned to the apache2 server. Someone set up a redirect in the httpd.conf file but I believe it needs to go into the virtualhost. I tried setting the redirect in the virtualhost as: *ProxyPass / http://localhost:8080/openrunner-webapp All that does is show me the root of the Apache webserver. Anyway I'm stuck

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• Nginx's speed, and how to replicate it [migrated]

  - by Mediocre Gopher

  I'm interested in this from more than an academic standpoint rather than a practical standpoint; I don't plan on creating a production webserver to compete with nginx. What I'm wondering is how exactly nginx is so fast. The top google response for this is this thread, but it merely links to a cryptic slideshow and a general covering of different io strategies. All other results seem to simply describe how fast nginx is, rather then the reason. I tried building a simple erlang server to try to compete with nginx, but to no avail; nginx won out. All my server does is spawn a new process for each request, uses that process to read the file to a socket, then closes the file and kills the thread. It's not complicated, but given erlang's lightweight processes and underlying aio structure I thought it would compete, but nginx still wins out by a consistent 300 ms average under a heavy stress test. What is nginx doing that my simple server isn't? My first thought would be keeping files in main memory instead of tossing them between requests, but the filesystem cache does this already so I didn't think it would make that great of difference. Am I wrong? Or is there something else that I'm missing?

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• How do I troubleshoot a slow hard drive?

  - by Bruce Connor

  My computer is suffering of slow-downs and I'm not surprised (it's around 6 years old). Here's what I've verified: They are not very frequent (only a couple of times a day). When they happen a single application will hang for 10-60 seconds, while the rest don't hang but also get slow. Even as it is happening, the CPU usage stays low. It happens to applications (such as text editor, firefox, skype). It never happens to some applications (such as games) which I use for hours under heavy CPU load. Also of note: The Graphics card and PSU are new (around a year). Though I have a decent amount of software installed right now, this was happening even right after I reinstalled Windows. This HDD has been through many partinioning schemes, and a few heavy operations (such as moving around 200GB of data). Because of the above, I am already 70% sure the problem is with the hard drive. Before I replace it, however, I want to rule out other less likely possibilities (such as RAM, software, or PSU). I don't have the money to replace the entire box right now, but I can easily replace one of the components. I've read several questions (such as this one) which give general guidance on troubleshooting an unknown issue, that is not what I'm looking for here. My main question is: What tests or benchmarks can I run to verify I have a problematic hard drive? I don't need to solve this problem, I am content with just making sure it's the hard drive. I could borrow a newer hard drive from a friend and see if it gets better. A positive result would rule out all other components, but it wouldn't rule out a software issue (since this new hard drive won't have any of the software I use daily). Running on Windows/Linux.

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• Pentium 4 Willamette vs. Faster Celeron Northwood [closed]

  - by Synetech inc.

  Which is the preferable of the following two processors? Intel® Pentium® 4 Processor 1.70 GHz, 256K Cache, 400 MHz FSB Willamette Intel® Celeron® Processor 2.40 GHz, 128K Cache, 400 MHz FSB Northwood Details: A few months ago my motherboard died, so I bought a used computer that had a 2.4GHz Celeron. My old system had a 1.7GHz Pentium 4, so now I’m trying to decide which CPU to use. Obviously a P4 is preferable over a Celeron, but the Celeron is (significantly?) faster than the P4. I’m wondering if the faster Celeron might be better for certain tasks (ie, stronger but dumber is better at some things than smarter but weaker). I tried Googling for some reviews and comparisons for graphs to get a clear depiction of which is better overall, but found nothing that helped. (I did manage to find one page that indicates (apparently by poll, not benchmark) that the Celeron is better.) So which CPU should I use? Does anyone know of some graphs that I can use to compare the two? The system is a general-purpose machine for word-processing, Internet, and casual games (not Crysis, but not Solitaire either). It will be running Windows XP. The board is a 478 with 400MHz FSB.

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• Are HDMI to VGA Adapters Really Device-Specific?

  - by allquixotic

  There are a lot of devices on the market right now (especially mobile devices) with a Micro-HDMI or Mini-HDMI port and no VGA or D-Sub output. Most manufacturers of said devices sell a cable that looks something like this: I have yet to find a cable like this that claims to work on a wide array of devices. In general, these cables claim to work with one specific device only. The way these cables work, I think, is that analog VGA signals are sent from the HDMI port on the device. This should work for devices that have special hardware on the motherboard/GPU capable of driving this. Is it the case that these cables have to be custom designed for each device? Or, is it rather that any device which possesses this special "signaling of analog VGA over the HDMI port" can be made to work with a cable that is physically compatible (i.e. the HDMI end plugs into the device and the VGA end accepts a VGA monitor cable)? Note that I am not looking for a product recommendation, just a conceptual clarification on what exactly these devices are doing. Also, a few remarks: The cables like the one depicted here are not digital to analog converters. I know about these: they are expensive, and they are the ONLY solution if your device only outputs a digital signal and is incapable of driving analog VGA over the HDMI port. The cables like the one depicted here are not straight crossover cables from VGA to HDMI, either. The crossover cables are designed to send a digital HDMI signal over the VGA port's wires; that is, the wire protocol is HDMI (digital) but the physical pinout is the same as VGA, even though nothing analog is happening. Once again, this is not the behavior that, I believe, the devices which I'm talking about in this question are doing. The cabling and devices that this question is about transmit the analog VGA data over the HDMI port (the HDMI port is in the device outputting the data, and the VGA side is the monitor/projector).

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• iRedMail home setup - use different SMTP relay for different destination domains

  - by John

  Hello helpful server folks, I'm messing with iRedMail. I've mostly been successful, I think I have an SMTP problem. I have changed RoundCube (webmail) to use BrightHouse's, my ISP's, SMTP server for outgoing. It works fine, I click send and poof, I have gmail. I can reply from gmail to my email server, and it works. It took 10 hours for the email to show up, which is a different problem, I think, but it does work. But when I send from my server TO my own server, my ISP's Postmaster account sends me a cryptic blurb. I just got off the phone with them, and they say it "should work", and that they can't reach my pop3 server. (pop3, pop3s, imap, and imaps are all open on my router and forwarded to the server, I'm not sure what I need, I'm just covering my bases...) pop3 and/or imap as external interfaces are just formalities, I really just want webmail to work. Roundcube only takes one SMTP server in its configs. How can I configure Postfix to relay / forward emails to my ISP's SMTP, while taking messages bound for my own domain and processing them? Since my ISP won't let me "bounce" my emails off of it. Maybe I'm vastly misunderstanding how e-mail works in general: To receive mail, I should only need port 25, SMTP, open to the internet, correct? Should I be concerned about some authentication failure from the outside to my relay? (My relay requires user/pass to use, my ISP's requires none.)

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• How can I tell which page is creating a high-CPU-load httpd process?

  - by Greg

  I have a LAMP server (CentOS-based MediaTemple (DV) Extreme with 2GB RAM) running a customized Wordpress+bbPress combination . At about 30k pageviews per day the server is starting to groan. It stumbled earlier today for about 5 minutes when there was an influx of traffic. Even under normal conditions I can see that the virtual server is sometimes at 90%+ CPU load. Using Top I can often see 5-7 httpd processes that are each using 15-30% (and sometimes even 50%) CPU. Before we do a big optimization pass (our use of MySQL is probably the culprit) I would love to find the pages that are the main offenders and deal with them first. Is there a way that I can find out which specific requests were responsible for the most CPU-hungry httpd processes? I have found a lot of info on optimization in general, but nothing on this specific question. Secondly, I know there are a million variables, but if you have any insight on whether we should be at the boundaries of performance with a single dedicated virtual server with a site of this size, then I would love to hear your opinion. Should we be thinking about moving to a more powerful server, or should we be focused on optimization on the current server?

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• WT-NMP - PHP-CGI randomly stops running with no error log

  - by alexfontaine

  We have recently installed WT-NMP and are currently running Php-Cgi with php 5.4.24. We are running fairly simple php scripts and when testing everything is running fine. Over the weekend we wanted to keep the server running test it over a longer period of time. The server and scripts ran fine all day on Friday, but sometime late on Saturday, the php-cgi stopped running. There are no errors in the error log (C:\WT-NMP\log). In the configuration (php.ini) I have the following options set: error_reporting = E_ALL display_errors = On display_startup_errors = On log_errors = On html_errors = On error_log = "c:/wt-nmp/log/php_error.log" We also have the standard nginx.conf error logs: access_log "c:/wt-nmp/log/nginx_access.log"; error_log "c:/wt-nmp/log/nginx_error.log" warn; So, since the log directory is empty, I am assuming that the running php scripts and general nginx operations are not causing the php-cgi to stop. So my questions are: What else could cause the php-cgi to stop running? Are there any other options for logging that we could turn on that could help us track this down? Are there other log locations that we should be looking at? Thanks!

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• Do you need to advertise an AFP service via Avahi for an Ubuntu Server to show up in OSX Finder?

  - by James

  I am only advertising an NFS share plus the "model", and I don't want to install extra services on the Server unless I have to, ie netatalk, as it is used solely for NFS exports. Currently there is no entry in Finder under "Shared" with below config of Avahi. serveradmin@FILESERVER:/etc/avahi/services$ cat nfs.service <?xml version="1.0" standalone='no'?><!--*-nxml-*--> <!DOCTYPE service-group SYSTEM "avahi-service.dtd"> <service-group> <name replace-wildcards="yes">%h</name> <service> <type>_nfs._tcp</type> <port>2049</port> <txt-record>path=/Volumes/StoragePool</txt-record> </service> <service> <type>_device-info._tcp</type> <port>0</port> <txt-record>model=Xserve</txt-record> </service> </service-group> Server: Ubuntu 12.04.01 x64 Clients: OSX 10.6.8 , 10.7.5, 10.8.2 The goal is to advertise that NFS share, then assign a really old Model code of Mac like a Powermac and switch out the icon for a more "LinuxServer-y" one. Plus allow users to connect to NFS in a manner they are familiar with like our other Xserve servers. I think Avahi is working in general as if I do: nfs://FILESERVER.local/Volumes/StoragePool it will connect fine. Any ideas?

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