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Fresh Apache install can't be connected to

- by Wayne M

I've got to be missing something here. I have a brand new CentOS server with a LAMP install on it. My domain host (GoDaddy) has the server's IP address configured as the "A Record". Since the server will host subdomains I have enabled NameVirtualHost and set up a virtual host pointing to the web app on the server. I haven't touched anything else in Apache, and it's listening on Port 80 like it should be. However, I can't connect to the server either by DNS or by IP address. I've set up several servers exactly like this one and never run into this before. What could be causing this? Did someone on the host set up a firewall or something that blocks port 80? As I said, I can't connect to the server via anything, but it's a barebones box with LAMP installed on it.

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server performance metrics report and practicality

- by Anjesh

I have a need of preparing web server (apache-php) performance report containing important metrics like CPU usage, disk io, memory usage on user basis. Couple of domains are hosted in the same server and they run from separate users using fcgi. The reason being sometimes some hosted applications take lots of cpu usage, making the server slow for other applications (running as separate users). i am planning to develop scripts for this, as i can't seem to find any simple utilities for this purpose. This script will take snapshots of the user wise metrics at defined periods say 15 minutes and record it. Any abnormalities will be reported via emails. How practical is that? also would be interesting to know what else need to be recorded.

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Kickstart Partitioning Configuration

- by Flo

I'be been trying to run a kickstart script with the following partition configuration: #Clear the masterboot record zerombr bootloader --location=mbr --driveorder=sda --append=" rhgb crashkernel=auto quiet" # Set up the partitions/logical volumes/logical groups clearpart --all part /boot --fstype=ext4 --asprimary --size=512 --ondisk=sda part swap --size=2048 --fstype=swap --ondisk=sda part pv.01 --fstype=ext4 --grow --size=200 --ondisk=sda part pv.02 --fstype=ext4 --grow --size=200 --ondisk=sdb volgroup VolGroup pv.01 pv.02 --pesize=32768 logvol /opt --fstype=ext4 --name=opt.fs --vgname=VolGroup --size=40000 logvol / --fstype=ext4 --name=root.fs --vgname=VolGroup --size=78000 I have two hard drives and it looks to me like its a really simple configuration. When I run the kickstart I keep getting all these errors that have to do with python files for configuring partitions. The only actual maybe useful piece of information is KeyError /dev/sda/ I tried a number of alterations of this configuration but nothing really worked. Any ideas?

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Downloading file from FTP using cURL

- by Josiah

I'm trying to use a cURL command to download a file from an FTP server to a local drive on my computer. I've tried curl "ftp://myftpsite" --user name:password -Q "CWD /users/myfolder/" -O "myfile.raw" But it returns an error that says: curl: Remote file name has no length! curl: try 'curl --help' or 'curl --manual' for more information curl: (6) Could not resolve host: myfile.raw; No data record of requested type I've tried some other methods, but nothing seems to work. Also, I'm not quite sure how to specify which folder I want the file to be downloaded to. How would I do that?

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irssi keybinding: backward_word/forward_word

- by vikenemesh

I'm currently experimenting with irssi as my irc client of choice and I'm getting along pretty well. BUT there is one thing I still need to get done. Somehow it isn't possible for me to use the usual CTRL+Left/Right to navigate between words in my input line. For the record: I'm using irssi on a linux-box through a screen session brought to my windows machine via ssh/putty. I already tried some key binding in irssi, maybe I did them wrong? /bind meta-n backward_word /bind meta-m forward_word both work fine. But neither /bind ^left backward_word /bind ^right backward_word nor /bind cleft-left backward_word /bind cleft-right backward_word work for a CTRL+Left/Right setup. Any Ideas?

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Dual Touchscreens in Different Rooms

- by Ash

I'm planning on having one dual-core system running two touchscreens, each in its own room in the house. I'd like to be able to use the internet on one, while someone else uses the other to record music - each of us interacting with the screen as we would separate computers. I was also thinking that running each screen, or certain programs, on its own core might make this work more smoothly. Will this setup work in Windows 7 Home on a mini-tower or do I need to invest in a server to get this sort of workstation/terminal setup to work?

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C#: Parallel forms, multithreading and "applications in application"

- by Harry

First, what I need is - n WebBrowser-s, each in its own window doing its own job. The user should be able to see them all, or just one of them (or none), and to execute commands on each one. There is a main form, without a browser, this one contains control panel for my application. The key feautre is, each browser logs on to secured web page and it needs to stay logged in as long as possible. Well, I've done it, but I'm afraid something is wrong with my approach. The question is: Is code below valid, or rather a nasty hack which can cause problems: internal class SessionList : List<Session> { public SessionList(Server main) { MyRecords.ForEach(record => { var st = new System.Threading.Thread((data) => { var s = new Session(main, data as MyRecord); this.Add(s); Application.Run(s); Application.ExitThread(); }); st.SetApartmentState(System.Threading.ApartmentState.STA); st.Start(record); }); } // some other uninteresting methods here... } What's going on here? Session inherits from Form, so it creates a form, puts WebBrowser into it, and has methods to operate on websites. WebBrowser requires to be run in STA thread, so we provide one for each browser. The most interesting part of it is Application.Run(s). It makes the newly created forms alive and interactive. The next Application.ExitThread() is called after browser window is closed and its controls disposed. Main application stays alive to perform the rest of the cleanup job. When user select "Exit" or "Shutdown" option - first the browser threads are ended, so Application.ExitThread() is called. It all works, but everywhere I can read about "main GUI thread" - and here - I've created many GUI threads. I handle communication between main form and my new forms (sessions) with thread-safe methods using Invoke(). It all works, so is it right or is it wrong? Is everything right with using Application.Run() more than once in one application? :) An ugly hack or a normal practice? This code dies if I start a WebBrowser from the session form thread. It beats me why. It works however if I start WebBrowser (by changing its Url property) from any other thread. I'd like to know more what is really happening in such application. But most of all - I'd like to know if my idea of "applications in application" is OK. I'm not sure what exactly does Application.Run() do. Without it forms created in new threads were dead unresponsive. How is it possible I can call Application.Run() many times? It seems to do exactly what it should, but it seems a little undocumented feature to me. I'm almost sure, that the crashes are caused by WebBrowser component itself (since it's not completely "managed" and "native"). But maybe it's something else.

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how to setup a public dns server?

- by Zhenyu Li

I just installed powerdns, and I added the record example.com A 120 1.2.3.4 and I used dig to see if it works, and it works. dig @localhost example.com and it will show the correct ip address : 1.2.3.4 My question is how to use this dns server in the public, so that my domain example.com to be dig without the @localhost? I will need the ns1.example.com ns2.example.com to be pointed to my 2 powerdns server ip, and I need to use my dns server to set the ns1.example.com, ns2.example.com, so that my other products could also setup ns1.example.com as their dns server, so how to do this?Edit

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Why some recovery tools are still able to find deleted files after I purge Recycle Bin, defrag the disk and zero-fill free space?

- by Ivan

As far as I understand, when I delete (without using Recycle Bin) a file, its record is removed from the file system table of contents (FAT/MFT/etc...) but the values of the disk sectors which were occupied by the file remain intact until these sectors are reused to write something else. When I use some sort of erased files recovery tool, it reads those sectors directly and tries to build up the original file. In this case, what I can't understand is why recovery tools are still able to find deleted files (with reduced chance of rebuilding them though) after I defragment the drive and overwrite all the free space with zeros. Can you explain this? I thought zero-overwritten deleted files can be only found by means of some special forensic lab magnetic scan hardware and those complex wiping algorithms (overwriting free space multiple times with random and non-random patterns) only make sense to prevent such a physical scan to succeed, but practically it seems that plain zero-fill is not enough to wipe all the tracks of deleted files. How can this be?

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Download videos from youtube as I see it

- by Sab

This may seem a somewhat strange requirement : I want to download youtube videos as I see it. I know that I would have to capture the packets using a program like wireshark , and I do know that this is possible. So lets say I have 3 computers on my network and 1 smartphone. Lets say I view a youtube video on my phone. I now want this video to be recorded on any one of the computers so that I can see it later(record in the sense capture the packets so that I dont have to download it again and waste my bandwidth). Are there any programs which will do this for me? The reason I want this is I use IMediaShare to view youtube videos on my Tv. Now once I see a video if I want to see it at a later point of time I have to download the entire video again.

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Bind dns server in Solaris 10 and win xp clients

- by stevecomptech

Hi, Added this in zone db file, I am running solaris 10 _ldap._tcp.mydomain.com. SRV 0 0 389 dc.mydomain.com. _kerberos._tcp.mydomain.com. SRV 0 0 88 dc.mydomain.com. _ldap._tcp.dc._msdcs.mydomain.com. SRV 0 0 389 dc.mydomain.com. _kerberos._tcp.dc._msdcs.mydomain.com. SRV 0 0 88 host.mydomain.com. Now I get this error when I try to join win xp to the domain The query was for the SRV record for _ldap._tcp.dc._msdcs.mydomain.com The following domain controllers were identified by the query: host.mydomain.com Common causes of this error include: Host (A) records that map the name of the domain controller to its IP addresses are missing or contain incorrect addresses. Domain controllers registered in DNS are not connected to the network or are not running. What do I need to change in order my win xp join the domain

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Different Servers for incoming mails

- by André

Hi everybody, not sure if what I want is possible so I´d appreciate any pointers. I have full control over the infrastructure (DNS and servers) Currently I receive mails for domain.tld. MX record for domain.tld is gw.domain.tld. gw then does some spam and virus checking and forwards the mails to the internal exchange server. GW is a Proxmox Mail Gateway Box (Free license) Now what I want is to distribute mails for different recipients to other mail servers. Basicly I only want [email protected] and [email protected] to go to the exchange as before, but all others go to a different mail server (based on linux). Any idea how I could achieve this?

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Are there any tools for monitoring individual Apache virtual hosts in real-time?

- by Dave Forgac

I'm looking for a way to monitor and record Apache traffic, separated by virtual host. I am currently using Munin to capture this and other data for the entire server however I can't seem to find a way to do this by vhost. This link describes using a module called mod_watch which is apparently no longer in development: http://www.freshnet.org/wordpress/2007/03/08/monitoring-apaches-virtualhost-with-munin/ The file that is listed as being compatible with Apache 2.x is reported to have problems with missing vhosts an reporting data correctly. Does anyone know of a reliable way to determine real-time traffic per vhost? If I can find this it should be easy enough to write a new Munin plugin.

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Bind include all zones in a folder

- by alexcepoi

I have a webapp that acts as a DNS manager, writing all zones to "/var/named". I would like to be able to configure named to load all zones in that folder, without explicitely having to tell it which zone goes to which file. Is that remotely possible? The reason for this is that i will be having a lot of zones added/deleted and a lot of records for each of them. I was thinking for using a database for that, but the idea of doing 500 record inserts scares me (it needs to be snappy). It's easier to write to a file. Any suggestions?

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refresh windows network performance counters in command line

- by michalv82

I am testing a USB device connected to a windows PC. When the device is connected then windows has another network interface going through the device. I need to get the bytes transffered for that specific interface, basically I need the data shown in the networking tab in the task manager for my interface adapter. I found this question which helped to get this info: ms windows network activity bytes send and receive in command line However I have a problem when I run multiple tests - each time I disconnect and connect the device there's another line for the interface, like below. In the task manager networking tab I only see one record for my interface but I don't know how I can know from command line which is the lastest and current instance (it's not like the first line or last line is always the current interface, I noticed it's not consistent): wmic path Win32_PerfRawData_Tcpip_NetworkInterface Get Name,PacketsReceivedPerSec,PacketsSentPerSec,BytesReceivedPersec,BytesSentPersec BytesReceivedPersec BytesSentPersec Name PacketsReceivedPersec PacketsSentPersec 422666370 6317989292 Intel[R] 82579LM Gigabit Network Connection 2715169 8109643 49150 375973 My USB Device 432 568 0 0 My USB Device _2 0 0 0 0 My USB Device _3 0 0 0 0 My USB Device _6 0 0 0 0 Local Area Connection* 9 0 0

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Stereo Mix does not work

- by rfw

Stereo Mix no longer seems to work on my computer -- it did once, but now I am unable to receive any sort of audio from it. When trying to record it with programs such as Audacity, it reports that there is an error opening the sound device. Additionally, I can make no changes whatsoever to Stereo Mix, such as with regards to default format, where it simply reports Format not supported by device. I am sure that Stereo Mix had definitely worked in the past, so does anyone have any idea as to why Stereo Mix would suddenly break? (I have no applications taking exclusive control of Stereo Mix)

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Bind dns server in Solaris 10 and win xp clients

- by stevecomptech

Hi, Added this in zone db file, i am running solaris 10 _ldap._tcp.mydomain.com. SRV 0 0 389 dc.mydomain.com. _kerberos._tcp.mydomain.com. SRV 0 0 88 dc.mydomain.com. _ldap._tcp.dc._msdcs.mydomain.com. SRV 0 0 389 dc.mydomain.com. _kerberos._tcp.dc._msdcs.mydomain.com. SRV 0 0 88 host.mydomain.com. Now i get this error when i try to join win xp to the domain The query was for the SRV record for _ldap._tcp.dc._msdcs.mydomain.com The following domain controllers were identified by the query: host.mydomain.com Common causes of this error include: Host (A) records that map the name of the domain controller to its IP addresses are missing or contain incorrect addresses. Domain controllers registered in DNS are not connected to the network or are not running. What do i need to change in order my win xp join the domain

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How to copy/paste LARGE amounts of text in Windows

- by Johnson

I am not sure if this is more suited for Superuser or Stackoverflow, but here goes... A little bit of background: I'm learning SQL and was trying to make a very large table which I could use for optimization tests. Something generic with random values. I created a little Java program to do just that, and was able to put out a text file with 100,000 lines, each line being an SQL INSERT statement for a new random record. However, with anything much bigger than 100,000 lines, I had problems either opening/using the text file in any text editor, or copying/pasting the text to the windows clipboard and then into SQL Developer so I could execute it as a script. I'm probably overlooking something really obvious, or doing something really stupid. There has got to be a better way to do this, but I couldn't find anything through Google or Stackoverflow or Superuser. Thanks!

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Windows XP Activation Issues

- by David

Related to my older question: Get xp product key from boot Thanks for the help on that one. So, in the end, i couldn't get into my harddrive because i didn't have the available hardware to hook it up to another computer to get the old activation key. So, instead, i entered another activation key (i know, naughty) in hopes that there would be a way to retrieve the old one, restore point or something afterwords. What legal ways can I get xp re-activated after a repair when I don't have any record of my activation key? for those who think im just trying to crack it, your wrong: Got a virus, which stopped me from getting into windows Got AVG Anti Virus, which stopped me from getting into safe mode Got a 2 year old, who decided to rip-off and chew my activation sticker on my computer (nice one). Repaired windows installation thinking i wouldn't be asked to re-enter the activation key, to find that i was.

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Are changes to the date and time logged in Windows Server?

- by user17605

We've recently gone into British Summer Time in the UK. One of our techs, anticipating the move, decided to change the time on one of our servers. Bad move. This server happens to have a number of time-based incidents logged to it, and as a result of this change, the times are unreliable. I'm trying to build a concrete timeline of when the clock was changed so I can apply corrective action to our time-based records. My question is:- Does Windows record date and time changes anywhere so I can get hard, actual data? Thanks

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Converting or playing a .264 video file?

- by Dan

I recently bought a Chinese brand DVR (to record security cams). The DVR exports the video files with a ".264" extension. This is my first time ever dealing with this video format. Anyhow I've been trying to convert the videos to any other format so it will be easier to watch the videos. The problem is that I could only find one program that can convert and play those files which is Elecard studio something, and even that Elecard studio thing is having trouble with these files, some of them are just making it crash so I can't convert them. I've tried to find some other programs but I couldn't find anything that can actually play those files. How can I play or convert these files to another format?

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How to link data in different worksheets

- by user2961726

I tried consolidation but I can not get the following to work as it keeps saying no data consolidated. Can somebody try this dummy application and if they figure out how to do the following below can give me a step by step guide so I can attempt myself to learn. I'm not sure if I need to use any coding for this: In the dummy application I have 2 worksheets. One known as "1st", the other "Cases". In the "1st" worksheet you can insert and delete records for the "Case" table at the bottom, what I want to do is insert a row into the Case Table in worksheet "1st" and enter in the data for that row. What should happen is that data should be automatically be updated in the table in the "Cases" worksheet. But I can't seem to get this to work. Also if I delete a row from the table in Worksheet "1st" it should automatically remove that record from the "Cases" worksheet table. Please help. Below is the spreadsheet: http://ge.tt/8sjdkVx/v/0

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DNS propagation

- by Paddington

I have 1 primary DNS server (ns1.mydomain.com) running on Fedora and 2 secondary ones (ns2 and ns3). DNS changes made on my web servers first goes to the primary name server and then propagates to the secondary servers. After making a DNS change on a domain on the web server, I can't see the new dns information on my ns1 when I perform: dig @ns1 A blahblah.com I then went to the master records on the names server (uses named) in the directory /var/named/run-root/var/named/masters and I see the A record has been updated appropriately. Tailing the logs /var/log/messages is not showing any errors. What could be the issue?

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C#: The input stream is not a valid binary format.

- by Mcoroklo

I have a problem with deserializing in C#/ASP.NET, which gives the exact error: The input stream is not a valid binary format. The starting contents (in bytes) are: 41-41-45-41-41-41-44-2F-2F-2F-2F-2F-41-51-41-41-41 ... What I am trying to do I have a structure with 3 classes. I have a class A which is a base class, and then class B and C which are derived from A. I am trying to store random types of B and C in the database using LINQ to SQL, in a column with the type VARCHAR(MAX). I cannot use BINARY as the length is around 15.000. My code... Error is in the LAST codeblock C# Code in Business layer- Storing a record private void AddTraceToDatabase(FightTrace trace) { MemoryStream recieverStream = new MemoryStream(); MemoryStream firedStream = new MemoryStream(); MemoryStream moveStream = new MemoryStream(); BinaryFormatter binaryFormatter = new BinaryFormatter(); binaryFormatter.Serialize(recieverStream,trace.Reciever); binaryFormatter.Serialize(firedStream,trace.FiredBy); binaryFormatter.Serialize(moveStream,trace.Move); string reciever = Convert.ToBase64String(recieverStream.ToArray()); string fired = Convert.ToBase64String(firedStream.ToArray()); string move = Convert.ToBase64String(moveStream.ToArray()); this.dataAccess.AddFightTrace(trace.TraceType.ToString(),reciever,move,fired,trace.DateTime,this.FightId); } C# Code in Data access layer - Storing a record public void AddFightTrace(string type, string reciever, string Move, string firedBy, DateTime firedAt, int fightid) { GameDataContext db = new GameDataContext(); dbFightTrace trace = new dbFightTrace(); trace.TraceType = type; trace.Reciever = reciever; trace.Move = Move; trace.FiredBy = firedBy; trace.FiredAt = firedAt; trace.FightId = fightid; db.dbFightTraces.InsertOnSubmit(trace); db.SubmitChanges(); } C# Code getting the entry in the database public List<dbFightTrace> GetNewTraces(int fightid, DateTime lastUpdate) { GameDataContext db = new GameDataContext(); var data = from d in db.dbFightTraces where d.FightId==fightid && d.FiredAt > lastUpdate select d; return data.ToList(); } C# Factory, converting from LINQ to SQL class to my objects THIS IS HERE THE ERROR COMES public FightTrace CreateTrace(dbFightTrace trace) { TraceType traceType = (TraceType) Enum.Parse(typeof(TraceType), trace.TraceType); BinaryFormatter formatter = new BinaryFormatter(); System.Text.UTF8Encoding enc = new System.Text.UTF8Encoding(); MemoryStream recieverStream = new MemoryStream(enc.GetBytes(trace.Reciever)); recieverStream.Position = 0; MemoryStream firedStream = new MemoryStream(enc.GetBytes(trace.FiredBy)); firedStream.Position = 0; MemoryStream movedStream = new MemoryStream(enc.GetBytes(trace.Move)); movedStream.Position = 0; // THE NEXT LINE HERE CAUSES THE ERROR NPC reciever = formatter.Deserialize(recieverStream) as NPC; Player fired = formatter.Deserialize(firedStream) as Player; BaseAttack attack = formatter.Deserialize(movedStream) as BaseAttack; FightTrace t = new FightTrace(traceType,reciever,attack,fired); t.TraceId = trace.FightTraceId; t.DateTime = trace.FiredAt; return t; } So the error happends when the first Deserialize method is run, with the above error. I have tried several things but I am quite lost on this one.. Thanks! :-)

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What is a descriptive name for a web service that responds with plain text?

- by Rich Shealer

I'm looking for the proper name for a web service that responds with text as opposed to XML. As an example this "cardServer" service will return 5 cards for a poker hand. http://hostname:8080/cardServer/deal/Game=Poker&Qty=5 The result could look like this: Card1=Ad Card2=Kc Card3=Ts Card4=5d Card5=3d The real world example is not as trivial, but the concept is the same. Parameters if any are passed as POST variables. We currently parse the response into a string list and use the values. The process works just fine. What I'm wondering if this service method has a name that has easier tools to deal with the responses and therefore did we reinvent the wheel? For the record the service was provided and maintained by a customer.

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