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• How to make a huge ram drive?

  - by Brandon Moore

  At my old job when a report was needed I could sit down with someone and pull up results and get immediate feedback, and then refine my queries and ultimately have the data we needed, in the format we needed within 30-90 minutes. I just started working for a new company with a database containing millions of records and I spent my whole 8 hours making a report that I feel I could have made in less than 2 hours if it were not for the massive amount of data the queries are working with, and the fact that I couldn't ask the person needing the data to sit down with me and give me feedback as I pulled up results as I am used to. So I am trying to think of how we can make the server faster... much faster, so that I can have the same level of productivity I'm used to. One thought that just came to mind is that memory is so cheap these days, and by my calculations I could buy 10 8gig ram sticks for 1000 bucks. What I have never heard of though is a device that would let me combine these into a huge ram drive. So I'd like to know if any such device exists, and if not what is the largest ram drive I could realistically make and how would I go about doing so? EDIT: To you guys who are saying the database shema needs to be analyzed... you can't make a query such as "Select f1, f2, f3, etc from SomeTable" run any faster by normalizing or indexing the table. What I'm talking about IS ABSOLUTELY a need for improved performance at the hardware level. I am used to having results come back to me in a few seconds, not a few minutes or much less a half an hour. Maybe that's what you guys are used to who have 100 billion record tables and you feel like that's fast, but I'm looking for results back from tables with about 10 million records to come back to me withing less than half a minute TOPS.

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• IPMI sdr entity 8 (memory module) only showing 3 records?

  - by thinice

  I've got two Dell PE R710's - A has a single socket and 3 DIMMs in one bank B has both sockets and 6 (2 banks @ 3 DIMMs) filled The output from "ipmitool sdr entity 8" confuses me - according to the OpenIPMI documentation these are supposed to represent DIMM slots. Output from A (1 CPU, 3 DIMMS, 1 bank.): ~#: ipmitool sdr entity 8 Temp | 0Ah | ok | 8.1 | 27 degrees C Temp | 0Bh | ns | 8.1 | Disabled Temp | 0Ch | ucr | 8.1 | 52 degrees C Output from B (2 CPUs, 3 DIMMS in both banks, 6 total): ~#: ipmitool sdr entity 8 Temp | 0Ah | ok | 8.1 | 26 degrees C Temp | 0Bh | ok | 8.1 | 25 degrees C Temp | 0Ch | ucr | 8.1 | 51 degrees C Now, I'm starting to think this output isn't DIMMS themselves, but maybe a sensor for each bank and something else? (Otherwise, shouldn't I see 6 readings for the one with both banks active?) The CPU's aren't near 50 deg C, so I doubt the significantly higher reading is due to proximity - Is anyone able to explain what I'm seeing? Does the output from my ipmitool sdr entity 8 -v here on pastebin seem to hint at different sensors? The sensor naming conventions are poor - seems like a dell thing. Here is output from racadm racdump

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• How to get my W2003-server (back) into the web (after setting up bridged networking)

  - by MBaas

  I have recently set up Virtualbox on a W2003-Server (which is also used as webserver, accessed from the web). My vbox worked nicely, but then I wanted more, I wanted to have the vm appear in the intranet like any ordinary pc. I was advised to setup bridged networking as opposed to NAT. I did so, and in the server's network connections have bridged the LAN-Connection and the "VirtualBox Host-Only Network" (yes, it says "host only network", but I assure that VBox networking is configured to use network bridge). So now my VM is visible in the intranet and it also has www-accesss, the server can also access the web. The only problem that came up is that the server is no longer accessible from the web. I've traced an HTTP-Request and it says "Can't connect to *:80 (connect: No route to host)". So maybe something in the router's config needs to be adjusted (yeah, well, the server's IP-Address changed from 192.168.1.199 to ...198). So I went into the router-config, reviewed port-forwarding for port 80 and adjusted the IP there, but it still didn't work. Unsure if it was a router-problem or rather something in the server's config, I've setup a "demilitarized zone" in the router and have put the server into it. (My understanding is that this would put the server straight into the web...) But the result of the HTTP-Requests is still the same :(

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• Curios: What makes CPUs better than others? [closed]

  - by Zizma

  I have been wondering about this for a long while now and was hoping someone here could answer it pretty easily. If I was looking for the most powerful CPU what should I really be looking at? There are so many different parameters of a CPU and I am wanting to know what each thing does and what really matters. Basically this: What is the deal with cores? If I take using optimized applications out of the mix would it theoretically better to get quad core 1.0GHz CPU or a 1 core 4 GHz CPU? Also, what is the difference between maybe an Sandy Bridge CPU versus an Ivy Bridge CPU? If they both were had the same clock speed and number of cores would the Ivy Bridge perform better? Does an older Xeon with an equal clock speed and number of cores to a new i7 really perform worse/slower? Does size matter? Why would I go with a 22nm CPU over a 32nm when the size difference is so trivial? What about the cache? When does the cache come into play with performance?

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• Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.

  - by Paul J. Warner

  I am having an issue with a program where after 6 mins +- 5 secs we get the above exception. Some more info about the exception stacktrace is below. This all happens pretty religiously, 6 mins goes by and bam the following 3 exeptions. We have the application installed in 2 other environments and it is working fine there. I am hoping to find some server settings either IIS 6 or Server 2003 settings that may be causing this issue to occur. I have reviewed some of the similar questions and don't see very many answers. I am hoping that maybe the information I have provided may help a little bit. 208741,Exception,,,,2011-06-21 00:30:14.193,SERVERNAME,2624,1,CLIENTNAME,The underlying connection was closed: An unexpected error occurred on a receive. , at System.Web.Services.Protocols.WebClientProtocol.GetWebResponse(WebRequest request) at System.Web.Services.Protocols.HttpWebClientProtocol.GetWebResponse(WebRequest request) at Microsoft.Web.Services3.WebServicesClientProtocol.GetResponse(WebRequest request, IAsyncResult result) at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size) at System.Net.FixedSizeReader.ReadPacket(Byte[] buffer, Int32 offset, Int32 count) at System.Net.Security._SslStream.StartFrameHeader(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security._SslStream.StartReading(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security._SslStream.ProcessRead(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.TlsStream.Read(Byte[] buffer, Int32 offset, Int32 size) at System.Net.PooledStream.Read(Byte[] buffer, Int32 offset, Int32 size) at System.Net.Connection.SyncRead(HttpWebRequest request, Boolean userRetrievedStream, Boolean probeRead),2004437127,114,1 208742,Exception,,,,2011-06-21 00:30:14.227,SERVERNAME,2624,1,CLIENTNAME,Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. , at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size) at System.Net.FixedSizeReader.ReadPacket(Byte[] buffer, Int32 offset, Int32 count) at System.Net.Security._SslStream.StartFrameHeader(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security._SslStream.StartReading(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security._SslStream.ProcessRead(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.TlsStream.Read(Byte[] buffer, Int32 offset, Int32 size) at System.Net.PooledStream.Read(Byte[] buffer, Int32 offset, Int32 size) at System.Net.Connection.SyncRead(HttpWebRequest request, Boolean userRetrievedStream, Boolean probeRead),2004437127,114,1 208743,Exception,,,,2011-06-21 00:30:14.287,SERVERNAME,2624,1,CLIENTNAME,An existing connection was forcibly closed by the remote host , at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size),-691097507,62,1

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• Any e-mail client with additional grouping functionality on Mac OS X?

  - by harald

  Hello, I'm very unhappy with my mail experience. I'm receiving a lot of mails from various clients and projects and need a way to better organize them. I would really love to have additional grouping-functionality with the e-mail client. Currently I'm using Mac OS X's Mail.app, but I am not bound to this. So I am open to any Mail.app-plugin or independent mail application commercial or not for Mac OS X -- should support IMAP, though -- but I think this should not be a problem nowadays? With Mail.app i'm doing the following: group by thread sort by datetime descending What I would love to have is not only additional tagging-functionality for e-mails -- I know, that at least thunderbird and postbox support them. I would love to have some additional grouping functionality for these tags -- inside the main mail window. So maybe I can summarize the important points: "native" Mac OS X mail client (no web-mailer please) automatic-tagging functionality (eg.: auto-apply tags by some kind of filter) easy access to tagged mails Easy access to tagged mails: I would really love to have some additional grouping functionality in the mail folders. The mail application should put all tagged mails in a group -- the groups should be sorted by last received e-mail. Inside the group I would still like to have the possiblity to group by thread. or It would be ok to have a list of tags (topics) on the left pane of the mail client. For example postbox: There is the 'accounts-section', there is the 'folders-section' -- but why is there no 'topics-section'? Thanks very much,

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• Changing Mac OS X 10.6 Routing after VPN'd In

  - by Matt Rogish

  I have a coffee shop around the corner that I use to do some work when I want to get away from home. They offer free wi-fi and I then use my Mac 10.6 VPN to log into my work network. I have "Send all traffic over VPN connection" checked. Before, their network was 10.0.0.x. I think they got a new router because it's now 192.168.2.x However, this interferes with one of the subnets at work so now I can't visit 192.168.2.x at work. So: 1) Office network: VPN gives IPs as 192.168.1.x. Another network is 192.168.2.x 2) Coffee network: Gives IPs as 192.168.2.x I think if I set a route to send all 2.x traffic over the tunnel, it would blow up my routing to their system, right? What should I do? I know the individual IPs of the servers I want... Maybe I could add each one, or can I add all of them minus the default gateway of their router? How do I set that up "temporarily" in my Mac? Thanks!!

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• Config Apache HTTP Server for Eclipse

  - by hqt

  Maybe this question is silly but I really don't know how to solve. First, as other server, I want to define new server. So, in Eclipse, I go to: WindowsPreferenceServer: 1) When I add new server, in list, no category for apache HTTP server. Just has apache tomcat. So, I click into download additional server adapter--still don't have in list. 2) So, I search. I point to location I have installed. Good, Eclipse sees that is a HTTP Server. And Eclipse see folder to put project into for me (because I use LAMPP so that folder isn't in Apache folder). But here is my problem. When I want to run a new PHP Project. Right click, run on server. A new dialog appear take me to choose which server to run. And, in list of server, no HTTP Server, So, I don't know how to choose Apache HTTP Server !!! (because Eclipse doesn't see which server that I have defined, eclipse just find adapter first) So, if I want to run this project, I must copy all and paste to apache folder. Too handy !!! Please help me. Thanks :)

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• MYSQL - Multiple set values in one update statement [migrated]

  - by Maurzank

  MYSQL - MULTIPLE SET VALUES IN ONE UPDATE STATEMENT USING 2 TABLES AS REFERENCE AND STORING VALUES IN ONE OF THOSE TABLES WITH A SPECIFIC LOGIC. Hello people, A problem came up by making an UPDATE. The example issue is as follows: CURRENUSRTABLE +------------+-------+ | ID | STATE | +------------+-------+ | 123 | 3 | | 456 | 3 | | 789 | 3 | +------------+-------+ HISTORYTABLE +------------+------------+-----+ | ID | TRDATE | ACT | +------------+------------+-----+ | 123 | 2013-11-01 | 5 | | 456 | 2013-11-01 | 5 | | 789 | 2013-11-01 | 5 | | 123 | 2013-11-02 | 4 | | 456 | 2013-11-02 | 4 | | 789 | 2013-11-02 | 4 | | 123 | 2013-11-03 | 3 | | 456 | 2013-11-03 | 3 | | 789 | 2013-11-03 | 3 | +------------+------------+-----+ I'm using these variables: @BA=3, @DE=5, @BL=4, What I'm trying to do is an update on CURRENUSRTABLE.STATE using HISTORYTABLE.ACT with the following logic: STATE value will be updated as ACT value, except when STATE value is 4 and ACT is 3, then STATE will be 5 I made this statement: UPDATE CURRENUSRTABLE RIGHT OUTER JOIN HISTORYTABLE ON HISTORYTABLE.ID=CURRENUSRTABLE.ID SET CURRENUSRTABLE.STATE= ( SELECT CASE HISTORYTABLE.ACT WHEN @DE THEN @DE WHEN @BL THEN @BL WHEN @BA THEN CASE CURRENUSRTABLE.STATE WHEN @BL THEN @DE ELSE @BA END END ORDER BY HISTORYTABLE.TRDATE,FIELD(HISTORYTABLE.ACT,@DE,@BL,@BA) ) WHERE HISTORYTABLE.TRDATE BETWEEN '2013-11-01' AND '2013-11-01' I'm intentionally using "RIGHT OUTER JOIN" and "HISTORYTABLE.TRDATE BETWEEN" because I'd like to change the values in CURRENUSRTABLE using a timeframe of more than one day. If I execute this statement many times using only one day (i.e. "BETWEEN '2013-11-01' AND '2013-11-01'" and then "BETWEEN '2013-11-02' AND '2013-11-02'"... etc ) it works perfectly, but if it is executed using the dates "BETWEEN '2013-11-01' AND '2013-11-03'" the results on CURRENUSRTABLE.STATE are 3, which is wrong, it should be 5. I think the problem relies on "CASE CURRENUSRTABLE.STATE" when uses "HISTORYTABLE.TRDATE BETWEEN '2013-11-01' AND '2013-11-03'", because it reads the STATE 9 times which has not been commited yet until the statement ends. Query OK, 9 rows affected (0.00 sec) Rows matched: 9 Changed: 9 Warnings: 0 Maybe the solution is very simple, but unfortunately I've not much practice on MySQL since I've worked with it less than 2 months :) Is there any suggestions to solve this issue? PD: MySQL version is 4.1.22, I know is very old an EOL, unfortunately I have to make these statements on this version. Thanks!

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• Can't ping my Window 7 machine from within a Windows XP virtual machine

  - by Jonathan Conway

  I have Windows 7 installed as my primary operating system, on a laptop that's on my home network (wireless). I'm using Microsoft Virtual PC 2007 SP1 to run a virtual machine of Windows XP SP3, in which I want to access the Windows 7 instance, both to browse a shared folder and access the local Apache server. So far I can ping my Windows 7 IP address (IPv4) and access the apache server through the web browser through HTTP. However using my machine name never seems to work. Pinging it fails, and I can't access my apache server using it either. The problem seems to be something to do with my machine's name being registered under IPv6 rather than IPv4. I'm at a loss what to do. Should I try to set up IPv6 on the virtual machine? Not sure how to go about that. Or maybe I should somehow get my machine name on Windows 7 to work with IPv4? Although I think it already does, because I can ping it from a separate box (running Ubuntu), which is only registered under IPv6.

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• Spotlight actually searching every file on "This Mac"

  - by Cawas

  I know of 2 ways to search for any file in your machine using Finder (some say it's Spotlight) and no Terminal. To prevent answers / comments about Terminal, I consider it either for scripting something or as last resource. It's not practical for lots of usages. For instance, if you want to find something to attach to a mail, or embed in iTunes or any other app, you can just drag n' drop one or many of them. Definitely not practical to do under Terminal. There are many cases of use for any, but the focus here is Graphical User Interface. Well, the 2 ways basically are: Press Cmd + Opt + Spacebar and type in your search. Press the + button, select "System files" and "are included". This is so far my preferred way, but I'm not sure it will go through every file. Open Finder, press Cmd + Shift + G and/or select just one folder. Type in your search and select the folder rather than "This Mac". This will bring files not shown in "This Mac" if you select a folder outside of the default scope. Thing is, none of those is really convenient or have the nice presentation from regular Spotlight, which you get from Cmd + Spacebar and just typing. And, as far as I've heard, the default behavior on Spotlight in Tiger was actually being able to find files anywhere. So, is there any way to make the process significantly simpler? Maybe some tweak, configuration or really good Spotlight alternative? I'd rather keep it simple and tweak Spotlight.

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• Copy a harddrive from a failed desktop machine using a second working one. [closed]

  - by MrEyes

  Heres the scenario: I have PC-A, an old PC that runs Windows XP but now refuses to boot due to a failed motherboard (or maybe PSU). This PC has a single 80gb IDE drive. I also have PC-B, running Windows Vista, this is working fine. I want to copy all the data off PC-As HDD onto PC-B. To do this I have taken the HDD out of PC-A and connected it as a slave to PC-B. PC-B now boots and sees the additional drive. However, when I attempt to access/copy user folders (i.e. Documents and Settings/[username]/*) I am told that I cannot access the folders due to user permissions. I am doing this under an adminstrator account on PC-B. So the question is, how can I "backup" the data? Preferably without making any changes to the drive contents. The reason for this is that it is possible that PC-A is failing due to a bad PSU, so I intend to replace it before writing off the machine. However I would feel much happier if I had a backup of the data on the HDD.

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• Extract archive here, autodetect subfolder

  - by lorancou

  I use 7-Zip under Windows 7 to extract all kind of archives. The ever-running problem is that there is not a single way to handle subfolders. Some people create their archives like this (let's call it type A): . +-- subfolder ¦   +-- file 1 ¦   +-- file 2 ¦   +-- ... "Extract Here" will extract everything to subfolder/, which is fine; "Extract to <Folder>" will create an extra subfolder level, which is annoying. And other people create them like that (let's call it type B): . +-- file1 +-- file 2 +-- ... "Extract Here" will populate the current folder, which can bring a lot of mess if this folder already contains tons of other files, and which is very annoying; "Extract to <Folder>" will create a subfolder and conveniently stuff it with the archive content, which is fine. So this leaves two options: always choose to "Extract to <Folder>" and live with the extra subfolder for type A archives. Or open the archive before extracting it to check if this is a type A or B, and then appropriately select "Extract Here" or "Extract to <Folder>". I usually do the latter, but I just discovered that KDE is offering a very handy Extract Archive Here, Autodetect Subfolder feature that automates that. It'll "Extract Here" if there's only one subfolder in the archive, otherwise it'll "Extract to <Folder>". I love this idea. Is there a Windows 7 tool offering this option? Preferably integrated in the explorer context menu? Maybe it's hidden somewhere in 7-Zip and I just didn't find it?

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• Flushing iptables broke my pipe, how can I save my instance?

  - by Niels

  I was setting up my iptables when I performed a iptables -F and my ssh pipe broke. This is the last output of my session: root@alfapaints:~# iptables -L Chain INPUT (policy DROP) target prot opt source destination ACCEPT all -- anywhere anywhere ACCEPT tcp -- anywhere anywhere state NEW,ESTABLISHED tcp dpt:2222 ACCEPT tcp -- li465-68.members.linode.com anywhere state NEW,ESTABLISHED tcp dpt:nrpe ACCEPT tcp -- anywhere anywhere tcp dpt:9200 state NEW,ESTABLISHED ACCEPT tcp -- anywhere anywhere tcp dpt:http state NEW,ESTABLISHED ACCEPT udp -- anywhere anywhere udp spt:domain Chain FORWARD (policy DROP) target prot opt source destination Chain OUTPUT (policy DROP) target prot opt source destination ACCEPT all -- anywhere anywhere ACCEPT tcp -- anywhere anywhere state ESTABLISHED tcp spt:2222 ACCEPT tcp -- anywhere anywhere state ESTABLISHED tcp spt:nrpe ACCEPT tcp -- anywhere anywhere tcp spt:9200 state ESTABLISHED ACCEPT tcp -- anywhere anywhere tcp spt:http state ESTABLISHED ACCEPT udp -- anywhere anywhere udp dpt:domain root@alfapaints:~# iptables -F Write failed: Broken pipe I tested my connection just before and I was able to connect with ssh. Now I did a nmap scan and not a single port is open anymore. I know my VPS is running on VMWare ESXi, could a reboot help? Or if not could I attach and mount the disk to another vm to save the data? Does anybody have some advise? And maybe an explanation what happend or what could have cause my pipe to break? ps: I didn't save my rules on the config directories of iptables. But used a file I stored in ~/rules.config to apply my rules like this: iptables-restore < rules.config So probably a reboot would help? Thanks a lot in advance.

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• What could cause a WMV to not play to completion in a browser?

  - by Ty W

  A realtor has had videos created for a community she is selling homes for, the people who made the videos gave them to us in WMV format. I can play these videos without any problem in Windows Media Player, VLC, and Quicktime (via Flip4Mac). I can play the videos from their location at videohomeguide.com in my browser without any trouble. However when I upload the files to our server the video stops at about the 1 minute mark in Safari and FireFox on Mac OS X Snow Leopard. I'm not sure if Windows browsers have the same issue because they are loaded using Windows Media Player. http://carolepaul.com/images/uploads/cottageslsjamestown.wmv <- our server, will fail at 1:09ish. http://www.videohomeguide.com/media/cottageslsjamestown.wmv <- should play to completion (3:27ish) The files generate the same MD5 hash on my desktop and on our server. I used WGET to transfer the files, always downloading from videohomeguide.com. Since the files are identical and are playable using VLC/WMP/Quicktime, and playable in the browsers from videohomeguide.com it seems to me that it is some sort of server config... maybe incorrect headers sent to the browsers? Here are the headers sent and received by FireFox on OS X: http://carolepaul.com/images/uploads/cottageslsjamestown.wmv GET /images/uploads/cottageslsjamestown.wmv HTTP/1.1 Host: carolepaul.com User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.2) Gecko/20100316 Firefox/3.6.2 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 115 Connection: keep-alive HTTP/1.1 200 OK Date: Mon, 29 Mar 2010 20:43:20 GMT Server: Apache/1.3.41 (Unix) PHP/5.2.6 FrontPage/5.0.2.2635 mod_psoft_traffic/0.2 mod_ssl/2.8.31 OpenSSL/0.9.8b Last-Modified: Wed, 02 Dec 2009 18:08:46 GMT Etag: "1e7919c-198eadc-4b16ad2e" Accept-Ranges: bytes Content-Length: 26798812 Keep-Alive: timeout=10, max=200 Connection: Keep-Alive Content-Type: video/x-ms-wmv

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• What GPT partition type to use for protecting DRBD metadata?

  - by Carsten Scholtes

  I'm planning to install a DRBD device on a (replicated) disk with two GPT partitions. DRBD requires some space for (preferentially "internal") metadata at the end of the underlying device. I'm hesitant to leave this space unpartitionend (or unformatted in a normal partition). I'd like to reserve an extra partition at the end of the underlying disk device for the metadata. (If I understand correctly, DRBD would not care about the partition or its type and could then use that space exclusively.) My question is: Which would be a suitable GPT partition type for such a metadata partition? It should not be a type interpreted while booting (such as EF00 EFI System). It should not be a type prone to be modified accidentialy by the booted OS (such as 8200 Linux swap, 8e00 Linux LVM, fd00 Linux raid). (The booted OS will be Ubuntu Linux 12.04.3.) It should not be a type indicating a normal filesystem (such as 0c01 or 8301), prone to be formatted correspondingly. It should not be a type requiring any special content in the partition (since the content is to be handled exclusively by DRBD). It should express the purpose of being reserved for something special (namely DRBD). (The types I listed are as provided by gdisk. I'm thinking about using some type unlikely to be used by the OS (maybe bf0a Solaris Reserved 4) or an invented(?) type such as fd01 (close to fd00 Linux raid…). Would something like this be suitable, too dangerous or even possible?)

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• CentOS security for lazy admins

  - by Robby75

  I'm running CentOS 5.5 (basic LAMP with Parallels Power Panel and Plesk) and have thus far neglected security (because it's not my full-time job, there is always something more important on my todo-list). My server does not contain any secret data and also no lives depend on it - Basically what I want is to make sure it does not become part of a botnet, that is "good enough" security in my case. Anyway, I don't want to become a full-time paranoid admin (like constantly watching and patching everything because of some obscure problem), I also don't care about most security problems like DOS attacks or problems that only exist when using some arcane settings. I'm in search of a "happy medium", for example a list of known important problems in the default installation of CentOS 5.5 and/or a list of security problems that have actually been exploited - not the typical endless list of buffer overflows that "maybe" a problem in some special case. The problem that I have with the usually recommended approaches (joining mailing lists, etc.) is that the really important problems (something where an exploit exists, that is exploitable in a common setup and where the attacker can do something really useful - i.e. not a DOS) are completely and utterly swamped by millions of tiny security alerts that surely are important for high-security servers, but not for me. Thanks for all suggestions!

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• Apache no longer starts at Windows boot up

  - by w3d

  I have Apache installed as part of XAMPP - local test server. It is configured as a Windows (XP) Service. Startup type is "Automatic". For a long time now it has always started when Windows boots up, but recently this has stopped happening. I now need to start it manually via the XAMPP Control Panel - at which point it appears to start up perfectly OK. The only recent updates to the machine (that I recall) are Windows Updates - none of which appear to have "known issues" that relate to this. And updates to Google Chrome. Any ideas what could prevent Apache from starting automatically at Windows (XP) boot up? EDIT#1 There are 2 related Errors in my system event log regarding the Service Control Manager: Timeout (30000 milliseconds) waiting for the Apache2.2 service to connect. The Apache2.2 service failed to start due to the following error: The service did not respond to the start or control request in a timely fashion. When I manually start the Apache server after boot up there are 2 "information" events stating that it was "sent a start control" and that it "entered the running state". Although I notice it appears to take 19 seconds between the start control being sent and entering a running state - according to the event log. So, maybe 30 seconds during boot up isn't long enough (anymore) for Apache to start??

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• VNC server failed to start CentOS

  - by Shaun

  I followed a tutorial on how to install and get VNCserver to run on CentOS 6 (since freenx isnt supported yet) and I keep getting Starting VNC server: 1:user [FAILED] How do I figure out whats going on here? Im new to Linux/CentOS and im trying to get RDP going so I can step away from SSH as much as possible (you know us Windows users love our pretty GUI's). So, where is the error log at and how do I find it? Or maybe someone else has experienced this and knows the solution based on the simple error given? After running in debug mode, here is my error + . /etc/init.d/functions ++ TEXTDOMAIN=initscripts ++ umask 022 ++ PATH=/sbin:/usr/sbin:/bin:/usr/bin ++ export PATH ++ '[' -z '' ']' ++ COLUMNS=80 ++ '[' -z '' ']' +++ /sbin/consoletype ++ CONSOLETYPE=pty ++ '[' -f /etc/sysconfig/i18n -a -z '' -a -z '' ']' ++ . /etc/profile.d/lang.sh ++ unset LANGSH_SOURCED ++ '[' -z '' ']' ++ '[' -f /etc/sysconfig/init ']' ++ . /etc/sysconfig/init +++ BOOTUP=color +++ RES_COL=60 +++ MOVE_TO_COL='echo -en \033[60G' +++ SETCOLOR_SUCCESS='echo -en \033[0;32m' +++ SETCOLOR_FAILURE='echo -en \033[0;31m' +++ SETCOLOR_WARNING='echo -en \033[0;33m' +++ SETCOLOR_NORMAL='echo -en \033[0;39m' +++ PROMPT=yes +++ AUTOSWAP=no +++ ACTIVE_CONSOLES='/dev/tty[1-6]' +++ SINGLE=/sbin/sushell ++ '[' pty = serial ']' ++ __sed_discard_ignored_files='/\(~\|\.bak\|\.orig\|\.rpmnew\|\.rpmorig\|\.rpmsave\)$/d' + '[' -r /etc/sysconfig/vncservers ']' + . /etc/sysconfig/vncservers ++ VNCSERVERS='1:larry 2:moe 3:curly' ++ VNCSERVERARGS[1]='-geometry 800x600' ++ VNCSERVERARGS[2]='-geometry 640x480' ++ VNCSERVERARGS[3]='-geometry 640x480' + prog='VNC server' + RETVAL=0 + case "$1" in + start + '[' 0 '!=' 0 ']' + . /etc/sysconfig/network ++ NETWORKING=yes ++ HOSTNAME=vps.binaryvisionaries.com ++ DOMAINNAME=server.name ++ GATEWAYDEV=venet0 ++ NETWORKING_IPV6=yes ++ IPV6_DEFAULTDEV=venet0 + '[' yes = no ']' + '[' -x /usr/bin/vncserver ']' + '[' -x /usr/bin/Xvnc ']' + echo -n 'Starting VNC server: ' Starting VNC server: + RETVAL=0 + '[' '!' -d /tmp/.X11-unix ']' + for display in '${VNCSERVERS}' + SERVS=1 + echo -n '1:larry ' 1:larry + DISP=1 + USER=larry + VNCUSERARGS='-geometry 800x600' + runuser -l larry -c 'cd ~larry && [ -r .vnc/passwd ] && vncserver :1 -geometry 800x600' + RETVAL=1 + '[' 1 -eq 0 ']' + break + '[' -z 1 ']' + '[' 1 -eq 0 ']' + failure 'vncserver start' + local rc=1 + '[' color '!=' verbose -a -z '' ']' + echo_failure + '[' color = color ']' + echo -en '\033[60G' + echo -n '[' [+ '[' color = color ']' + echo -en '\033[0;31m' + echo -n FAILED FAILED+ '[' color = color ']' + echo -en '\033[0;39m' + echo -n ']' ]+ echo -ne '\r' + return 1 + '[' -x /usr/bin/plymouth ']' + /usr/bin/plymouth --details + return 1 + echo + '[' 1 -eq 98 ']' + return 1 + exit 1

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• i7 overclocking problem

  - by benwebdev

  Hi everyone, I've got an overclocked system that seems to be misbehaving. When trying to boot up from cold the system just hangs and nothing is output to the screen. Fans are on as they should but nothing happens to finish the boot. From here I have to switch it off then on again and the boot completes. If I go into the tweak menu in the BIOS I'm informed that a boot has failed I've been in touch with Overclockers UK support a bit and theres not yet been a solution. We've mainly been tweaking the voltage for the CPU. Any suggestions? I'm new to Overclocking which is why I got a bundle with OCUK. With this issue happening on Cold Boot too its tricky to test as I have to make a change then wait till the next day. My system is here: Intel Core i7 930 2.80Ghz overclocked to 4GHz Gigabyte X58A-UD3R (BIOS Version: FC) 6GB RAM Power Supply - CoolerMaster Silent Pro M series 700W One suggestion made by OCUK was that maybe its the power supply but I'm not sure and dont have a spare - it's brand new and a pretty expensive piece of kit. Any thoughts on this? Other recomendations for Power? thanks Ben

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• samba "username map" stopped to work

  - by Kris_R

  It was time to upgrade our group server (new HDs, problems with old installation of DRBD, etc..). Going as usually for CentOS i upgraded whole system from 6.3 to 6.4 The later one came with samba 3.6 as the old one was 3.5. I transferred most of users by copying /etc/password, /etc/shadow and samba accounts with pdbedit. Homes were on nfs-drive. The translation of unix accounts to samba accounts are located in /etc/samba/smbusers. Strangely enough on some windows clients there was problem to connect to samba-shares. In one case the only thing that worked was, instead of giving windows name, to use the unix account. In another one, it was possible to mount network drive and to open it in Windows Explorer, however other applications like "Total commander" at the attempt of opening this drive gave the message "Cannot connect to z:" (sometimes at this moment user/pass were requested). The smb.conf has following entries: [global] security = user passdb backend = tdbsam username map = /etc/samba/smbusers ... [Kris] comment = Kris's Private path = /SMB/Users/Kris writeable = yes read only = no browseable = yes users = krisr printable = no security mask = 0777 force security mode = 0 directory security mask = 0777 force directory security mode = 0 force create mode = 0775 force directory mode = 6775 The smbusers: # Unix_name = SMB_name1 SMB_name2 ... krisr = Kris Of course testparm runs without any errors. I was used from samba 3.5 to outputs of form Mapped user Kris to krisr. Nothing like this happens now. Just message check_sam_security: Couldn't find user Kris in passdb. I read on web that some guys had problem with 3.6 and security = ADS, but these were not helpful for me. I'm seriously thinking about downgrading back to samba 3.5 but before this step I wanted to ask if somebody knows the solution of these problems. p.s. i've asked this question at serverfault but no answer came. Maybe I have more luck with this forum. Sorry for duplicate if any of you reads both.

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• DD-WRT (WRT54G) and (THOMSON TG782) how to put them togather?

  - by FeRtoll

  Ok so let me explain, i bought WRT54G and successfully installed DD-WRT v24-sp1 (07/26/08) mini-special - build 9994. That's all ok no problems with it all normal functioning. And just to add (i don't need wireless, wireless is turned off always) What i want: ISP's router (TG782) from it's INTERNET port(out) cable "which was before in my pc" is connected to WRT54G's INTERNET port and then from WRT54G LAN port 1 to my pc. The problem: How do i connect and setup all? I have tried many times on many different ways but cant get it to work IF THE CABLE FROM TG782 IS CONNECTED TO WRT54G ON INTERNET PORT. If i connect the TG782 to Lan port 1 on WRT54G and my pc to lan port 2 then all works fine after i setup gateway and all. But i want to connect TG782 to Internet port of WRT54G because i need "Access Restrictions" and this only goes through WAN right? please correct me if i am wrong. What i have tried: This is how i have tried to setup all. The TG782 router ip is 192.168.1.1 And WRT54G ip is 192.168.1.30 so in WRT54G control panel i have setup like this: ----WAN Connection Type---- Connection Type: Automatic Configuration - DHCP STP: Disabled ----Router IP---- Local IP Address: 192.168.1.30 Subnet Mask: 255.255.255.0 Gateway: 192.168.1.1 (the TG782) ----Network Address Server Settings (DHCP)---- DHCP Type: DHCP Server Start IP Address: 192.168.1.100 Maximum DHCP Users: 6 And this wont work i probably miss something more, if anyone can help i would be thankfull. Also i have to note that i have tried to set my network adapter on pc to use the gateway of WRT54G and ip 192.168.1.102 In short: i cant get it to work normal only as a switch! Thanks for any help! -------EDIT:------- Here is an image which maybe can help: http://img27.imageshack.us/img27/4227/allin1w.jpg

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• Can one really fry a monitor by setting the wrong HorizSync and VertRefresh?

  - by rumtscho

  I've encountered this problem on several different systems with several different monitors: a monitor functions perfectly under Windows. I install a Linux and the max resolution is at some impossibly low value, mostly 640x480, changing it in Xorg.conf doesn't work. The X.org log file then shows that the driver cannot determine the correct refresh rate for the monitor, so it ignores everything in Xorg.conf and just loads in some default minimalistic mode. Googling the problem leads to an easy solution: set the HorizSync and VertRefresh in Xorg.conf, and everything works. The problem seems to be a common one, and I've seen dozens of results recommending the solution. Each of them contains the warning that you should use the value ranges provided with the monitor. Because if you don't, and your video card sends a signal with the wrong refresh rate, this can damage your monitor. Of course, you don't have a user manual for your monitor any more. If you are lucky to find one on the attic or on the net, it doesn't contain any information about the supported refresh rate. So you just type in the value suggested in the solution description, which varies wildly depending on your source, and cross your fingers. You restart, and... ... you've set the wrong values. So the monitor shows a short message like "input signal out of range", and you do a hard restart, repair your Xorg.conf in recovery mode, and everything is fine, including your monitor. So does this warning reflect a real possibility, or is it just a geeky urban legend? Or is it something which used to happen in the past, before manufacturers started protecting the monitors against it? Is it technically possible with every monitor technology, or is it maybe something which can only happen to a CRT? If you think that it's true, why? Have you ever witnessed a monitor die from the wrong refresh config, or have you read of it in a reputable source?

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• Powershell Copy-Item fails silently

  - by R W

  I have a powershell 2.0 script running on Windows Server 2008 R2 64bit that copies some Hyper-V .vhd files to another server as a 'backup solution'. The script gets a list of the .vhd's to copy then iterates over that list to copy them using Copy-Item. It also writes some logging info to a file as well. The files are copied to another server (Windows Server 2003 Sp2) into a directory compressed with NTFS compression. One of the files isn't copied. It's relatively big ~ 68Gb. The others are 20Gb or less. The wierd thing is that during the copy process the file appears on the destination server and the log file generated seems to indicate the file is copied due to the difference in the times of the log file entries. I see no error messages on the log file and nothing in the event log of either machine. Here's the code that does the copy. Get-ChildItem $VMSource *.vhd -Recurse | foreach-object { $time = Get-Date -format HH.mm.ss Add-Content $logFileName "$time : File Copy ($_) started" $fullname = $_.FullName Add-Content $logFileName "$time : Copying $fullname to $VMDestination" Copy-Item $fullname $VMDestination -Force -ErrorAction SilentlyContinue -ErrorVariable errors foreach($error in $errors) { if ($error.Exception -ne $null) { Add-Content $logFileName "'tERROR COPYING FILE : $($error.Exception)" } } $time = Get-Date -format HH.mm.ss Add-Content $logFileName "$time : File Copy ($_) finished" } I can only think there's some problem with copying a file that big to a compressed directory maybe? Any ideas?

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• Ubuntu 11.10 ATI Drivers vesa park

  - by Matthias

  This is probably not an issue, from all I can get it seems my hardware and drivers are properly installed. However when I go to system settings - system info - graphics. I get Driver: VESA:PARK. Experience: Standard. my graphics card is a: Ati Mobility Radeon HD 5470 512MB. I am pretty sure it's not a same-die GPU since there is a fan exhaust at the side of my laptop which I presume is the exhaust for the GPU... I have no clue whatsoever what this means. I installed the ati drivers first using the 'additional drivers' method. However I also decided to look a manual installation up via the terminal since I've had problems before with Ubuntu and ati cards. I used wget and something among the lines of sh dpkg -i. I can recall exactly, I took them from another stackoverflow answer. Anyway, it seems everything is installed properly since it shows up with these commands: sudo lshw -C video fglrxinfo however the first command seems to detect hardware, not the driver per se, although the driver is probably needed to detect the hardware anyway which would indicate its properly installed. I am still not sure about that VES:PARK thing though. I'd like to know what it means.. Also, if someone happens to know a good way of testing if the gpu is connected/being used...some sort of benchmark maybe...I'd like to hear it. P.s. I can find my way around in Ubuntu but I would probably still be considered a rookie by more experienced users.

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