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  • Why am I experiencing random connection timeouts? (CentOS)

    - by Ryan
    I have a CentOS server setup that currently hosts several websites (all relative of each other in some form or another). As of recently throughout the day at the most random times the website speed will lag to a crawl and eventually hit a connection timeout. When I say random times this typically happens anywhere between 10am and 1pm usually, however, this morning this happened to me at 8am. I do not have a lot of familiarity with server knowledge as far as what I am looking for in this situation. What are some possible causes of why my server is slowing the websites down to a complete crawl or timing out? Are there specific things I should be checking for when this happens? I have noticed using: tail /var/log/httpd/access_log That usually when this down time occurs there are lot of IP addresses related to BingBot, Googlebot, and sometimes various bots or spiders that I am unfamiliar with. Could this be related and if so how can I avoid this from causing my websites to lag out? Thanks in advance for any help or advice. The websites that are timing out are built with PHP and use a MySQL database to display information.

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  • Is it possible to apply a Theme to Google Chrome when it's in "Application Mode"?

    - by lewen7er9
    I've applied the "brushed" theme (https://tools.google.com/chrome/intl/en/themes/theme%5Fbrushed.html) to my main google chrome browser windows without any problem. However none of the "application mode" shortcuts I created pick up this theme. For example, running chrome as follows does not pick up the "brushed" theme: chrome.exe --app=gmail.com I want to be able to apply themes to google chrome in application mode.

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  • Mesh Networked servers via vpn

    - by microspino
    I got a design idea and I would like to have some advice from SF about It. I have 5 customers with small real-estate databases. I've built for them a desktop app and now they would like to merge their database to share their data. I don't want to centralize everything in one place nor I want to do maintenance for servers. They told me also, that all of them in their offices, have little servers and maintenance guys available. Although everything seems suitable for web application, I had the idea to experiment something new: Any customer small-server wild be connected to the others in a sort of mesh network without a single point of failure and through VPNs. If one of the servers went down the customers could still connect to their databases from one of the other mesh networked servers instead of from the local one that is down. During normal operations all the servers sync the db with the others through VPNs. I can accept a half-day timing window of NON synched data, in other words, since I don't need real time synchronization, the server don't have to always stay in synch. I can migrate my data over to other Non-Sql technologies like CouchDB or Redis or whatever you suggest. As you can see I don't have a lot of constraints and although I could go with a web application I would like to delegate and decentralize support, data-privacy and management, as more as I can to my customers offices. Is that a crazy idea? Do you know If something similar exist? Which technology would you suggest?

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  • How can I delete rest of the line after a specific string?

    - by nixdagibts
    I'm looking for a way to search for a specific string e.g. '=UUID:' and delete it and all following characters per line. I would prefer a way/macro/addon for notepad++. But all other tools or scripts are welcome :) Before *://81.88.22.6/*=UUID:63969B2469B7A94EBBDBD7CB5B9C00BA *://*-ad.cgi*=UUID:3C8EFF48B674CC42BF5B6E2B7BA820E7 *://*-ads/*=UUID:0D6CF7D5BE3F034C8A136CC99A074406 Note that the numbers are always different per line so you couldn't do a search 'n replace with them. Should look like this after *://81.88.22.6/* *://*-ad.cgi* *://*-ads/*

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  • Easy way to deploy PHP sites from git

    - by Leopd
    I'm looking for recommendations on how to automate / simplify deployment from a git repository (github) to a hosting service. The hosting service supports FTP (yuck) / SSH / SFTP access. Any good tools out there to give push-button deployment of new revisions? I know it's not a hard script to write, but when you start thinking about things like roll-back and multiple sites, it gets complicated enough that I'd rather not re-invent the wheel.

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  • Using Truecrypt to secure mySQL database, any pitfalls?

    - by Saul
    The objective is to secure my database data from server theft, i.e. the server is at a business office location with normal premises lock and burglar alarm, but because the data is personal healthcare data I want to ensure that if the server was stolen the data would be unavailable as encrypted. I'm exploring installing mySQL on a mounted Truecrypt encrypted volume. It all works fine, and when I power off, or just cruelly pull the plug the encrypted drive disappears. This seems a load easier than encrypting data to the database, and I understand that if there is a security hole in the web app , or a user gets physical access to a plugged in server the data is compromised, but as a sanity check , is there any good reason not to do this? @James I'm thinking in a theft scenario, its not going to be powered down nicely and so is likely to crash any DB transactions running. But then if someone steals the server I'm going to need to rely on my off site backup anyway. @tomjedrz, its kind of all sensitive, individual personal and address details linked to medical referrals/records. Would be as bad in our field as losing credit card data, but means that almost everything in the database would need encryption... so figured better to run the whole DB in an encrypted partition. If encrypt data in the tables there's got to be a key somewhere on the server I'm presuming, which seems more of a risk if the box walks. At the moment the app is configured to drop a dump of data (weekly full and then deltas only hourly using rdiff) into a directory also on the Truecrypt disk. I have an off site box running WS_FTP Pro scheduled to connect by FTPs and synch down the backup, again into a Truecrypt mounted partition.

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  • Slow and unresponssive network

    - by Jason94
    Ive have the Nokia N900 mobile phone (running Maemo linux), and my device is really slow while using the wifi and trying to get stuff online (checking mail, loading pages). The webbrowsers itself (MicroB, Firefox, Opera) starts fast. Yesterday ive tried to set the dns to googles but that did not solve the case. Is there, and how do i check/verify my connection to the internet if im connected to my home wifi in linux? (tools, other then ping :D)

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  • Windows Server not installing audio drivers properly

    - by Adrian
    I am trying to install a dummy sound card on a Windows Server machine (in Amazon EC2 cloud) in order for one of my application to work. I'm trying to accomplish that with Virtual Audio Cable and REAUDIO3. Both tools managed to install a new device on my Windows XP machine, but on Windows Server, no new devices appear. Windows Audio and Plug and Play services are Started and Automatic. ANY ideas are greatly appreciated.

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  • Free Data Recovery Software

    - by Morais
    I lost some of my very important files from my computer. I tried the windows vista recovery from a restore point but could not get the files. Can some one please suggest some free data recovery tools. This is very urgent.

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  • Erase personal date from corporate laptop

    - by microspino
    Hello I need to delete my data from the company laptop. Nothing special just 2 or 3 folders (I hava a Dropbox on this pc) and I'd like to be sure they are gone. I read about free tools and bootable cd to erase the entire disk, I don't need those but just a free tool to put some zeros wehere my data were before.

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  • Issue using a "used" SSD as a Windows 8.1 Boot Drive

    - by EpiGrad
    So, I'm something of a Mac person, but decided to take a stab at this whole "build yourself a PC" thing - right now, the thing is assembled, posts just fine, and can get to the BIOS. The problem is the drive I want to use - I intended to use a 80 GB Corsair SSD I've had sitting around as the boot drive, and a new Samsung SSD for games and the like. So I boot using a Windows 8.1 install USB stick, and if the Samsung drive is plugged in, it happily offers to install Windows on it. The Corsair drive though, it's flipped out - I reformatted it as a blank NTFS drive (it was HFS for Mac purposes) and the BIOS can't see it, nor can the Windows installer. What's wrong, and how do I fix it? The tools at my disposal are: The current ASUS BIOS that came with my motherboard (a Z87I-Deluxe), a Mac running the latest OS X which can also boot to Windows 7 if needed via either Parallels or Bootcamp. Update 1: Update: Based on a friend's suggestion to switch SATA ports, Windows 8.1's installer can now see the drive as Drive 0, Partition 1, a 83.8 GB "Primary" partition. But when I click it and hit "Next", I get the following error: "We couldn't create a new partition or locate an existing one. For more information, see the Setup log files" - not that it gives any clue how to access those. Update 2: Following a trail of Google suggestions, I ended up going into advanced tools and just reformatting the drive as follows: Start DISKPART. Type LIST DISK and identify your SSD disk number (from 0 to n disks). Type SELECT DISK <n> where <n> is your SSD disk number. Type CLEAN Type CREATE PARTITION PRIMARY Type ACTIVE Type FORMAT FS=NTFS QUICK Type ASSIGN Type EXIT twice (one to get out of DiskPart, the other to exit the command line tool) Per these instructions. This goes well enough, but now I can select the disk for installation, and I get a new error: "Windows 8 cannot be installed to this disk. The selected disk has an MBR partition table. On EFI systems, Windows can only be installed to GP disks." So, Googling that, I do the following: select disk 0 clean convert gpt exit ...and we might have fixed it. Windows is at least trying to install now.

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  • How to configure hostname for `apache22` package on FreeBSD?

    - by Eonil
    I'm configuring development & test FreeBSD machine on VM. I installed apache22 package and restarted. But the daemon does not started with this error: %apachectl start httpd: apr_sockaddr_info_get() failed for test.box httpd: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName (13)Permission denied: make_sock: could not bind to address [::]:80 (13)Permission denied: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down Unable to open logs % My hostname is test.box. Because this is temporary test box, it has no real domain-name. But I used 2-level name to avoid long time waiting of sshd on booting. However, I searched web, and I modified /etc/hosts file like this (I didn't touches this file before): # This is original configuration #::1 localhost localhost.my.domain #127.0.0.1 localhost localhost.my.domain # New configuration ::1 localhost test.box 127.0.0.1 localhost test.box 127.0.0.1 test.box test Now apache fails with this error message: %apachectl start httpd: Could not reliably determine the server's fully qualified domain name, using test.box for ServerName (13)Permission denied: make_sock: could not bind to address [::]:80 (13)Permission denied: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down Unable to open logs % I don't know what's required now. Please let me know reason and solution of this error. ---- (edit) ---- The permission errors are caused from omission of sudo.

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  • Monitoring folder diffs across servers with zabbix

    - by Marcus
    Problem: I want to make sure that a certain folder is equal regarding it's contents across my servers. I do not want an automatic filesync to keep them equal, changing is done manually. My initial thought was to once a day calculate some crc/hash on folder and send to Zabbix, and trigger when values differ. Is there any good tools out there that can calculate crc or similar of a folder? Anyone know of another solution that solves my problem?

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  • Deploying multiple identical copies of a virtual machine for compute tasks

    - by Reid
    I have a compute task which has a large number of library dependencies. I would like to deploy it on some of my company's large Linux clusters, where I do not have root. I could probably track down, compile, and install the right versions of all the libraries, but this looks to be quite tedious and would have to be repeated if I deployed it again somewhere else. On the other hand, it's pretty easy to install on current Ubuntu. This led me to wonder about a virtual machine approach. Could I put together a virtual machine which booted up, ran the computation (with parameters from and results to the host), and then shut down? In other words, I'd like a command like this that I could run on the host: $ ./run-vm --ram N --task /path/on/host/foo.sh --results /another/host/dir/ This would boot the VM, run foo.sh, and put the (relatively small) results of the computation in /another/host/dir/. It's important to start up many instances of the VM simultaneously, both on a single node and multiple nodes of the cluster. So it would be nice if I didn't have to make many copies of the VM virtual disk and metadata. As the task instances are completely independent, the VMs would not need any network support once deployed, or any outside communications beyond reading and writing the host filesystem. Is this possible, and if so, how might I go about doing it? Are there assumptions I've made above which are bogus?

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  • Server 2008 R2 boot is at 2 hours and counting. What now?

    - by Jesse
    This morning, we rebooted our Server 2008 R2 box. No problem, came right back up. Then we shut it down and let it install windows updates. While it was off, we added some RAM. Then we turned it back on. The system came right back up to the "press ctrl-alt-delete" screen, so far, so good. I logged in. The system got as far as "Applying Group Policy" -- then spent almost an hour applying drive mappings. Finally finished that, and has now spent 30 minutes on waiting for the Event Notification Service. I still haven't been able to log in. Remote desktop service doesn't appear to be running yet. I tried viewing the event log from another machine. I see that the box is writing to the Security log, but there are no events in System or Application in the last 45 minutes. Digging through the System log of events from 45 minutes ago, I see a bunch of timeouts: A timeout (30000 milliseconds) was reached while waiting for a transaction response from the ShellHWDetection service. [lots of these] A timeout (30000 milliseconds) was reached while waiting for a transaction response from the wuauserv service. A timeout (30000 milliseconds) was reached while waiting for a transaction response from the SessionEnv service. A timeout (30000 milliseconds) was reached while waiting for a transaction response from the Schedule service. A timeout (30000 milliseconds) was reached while waiting for a transaction response from the CertPropSvc service. What can I do? Should I try shutting it down remotely, or will that do more damage?

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  • What filesystem comes closest to matching NTFS for support of ACLs, and highly-granular permissioning?

    - by warren
    It seems that most other filesystems handle the basic *nix permissions (ugo±rwx), with maybe an addition here or there. Or can be "made" to handle ACLs through the use of other tools on top of the system. On the wikipedia pages about filesystems (http://en.wikipedia.org/wiki/List%5Fof%5Ffile%5Fsystems & http://en.wikipedia.org/wiki/Comparison%5Fof%5Ffile%5Fsystems), it appears that while some do support extended meta-data, none support natively the level of permissioning that NTFS does. Am I wrong in this understanding?

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  • Is there an equivalent to Airfoil available for Linux?

    - by Chris Adams
    Hi there, I just stumbled across this Airfoil on Mac OS X, which lets me 'throw' music from my laptop to any other linux machine, iPhone or other device hooked up to a better set of speakers than my laptop - here's the page below: http://www.rogueamoeba.com/airfoil/mac/ What tools would I use to recreate this functionality on a linux box - are there any nice GUI interfaces to something like pulse audio (which is what I imagine I'd use ) for doing this? Thanks

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  • Strange File-Server I/O Spikes - What Is Causing This?

    - by CruftRemover
    I am currently having a problem with a small Linux server that is providing file-sharing services to four Windows 7 32-bit clients. The server is an AMD PhenomX3 with two Western Digital 10EADS (1TB) drives, attached to a Gigabyte GA-MA770T-UD3 mainboard and running Ubuntu Server 10.04.1 LTS. The client machines are taking an extremely long time to access/transfer data on the file server. Applications often become non-responsive while trying to open files located remotely, or one program attempting to open a file but having to wait will prevent other software from accessing network resources at all. Other examples include one image taking 20 seconds or more to open, and in one instance a user waited 110 seconds for Microsoft Word 2007 to save a document. I had initially thought the problem was network-related, but this appears not to be the case. All cables and switches have been tested (one cable was replaced) for verification. This was additionally confirmed when closing down all client machines and rebooting the server resulted in the hard-drive light staying on solid during the startup process. For the first 15 minutes during boot, logon and after logging on (with no client machines attached), the system displayed a load average of 4 or higher. Symptoms included waiting several minutes for the logon prompt to appear, and then several minutes for the password prompt to appear after typing in a user name. After logon, it also took upwards of 45 seconds for the 'smartctl' man page to appear after the command 'man smartctl' was issued. After 15 minutes of this behaviour, the load average dropped to around 0.02 and the machine behaved normally. I have also considered that the problem is hard-drive-related, however diagnostic programs reveal no drive problems. Western Digital DLG, Spinrite and SMARTUDM show no abnormal characteristics - the drives are in perfect health as far as the hardware is concerned. I have thus far been completely unable to track down the cause of this problem, so any help is greatly appreciated. Requested Information: Output of 'free' hxxp://pastebin.com/mfsJS8HS (stupid spam filter) The command 'hdparm -d /dev/sda1' reports: HDIO_GET_DMA failed: Inappropriate ioctl for device (the BIOS is set to AHCI - I probably should have mentioned that).

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  • Possible disk IO issue

    - by Tim Meers
    I've been trying to really figure out what my IOPS are on my DB server array and see if it's just too much. The array is four 72.6gb 15k rpm drives in RAID 5. To calculate IOPS for RAID 5 the following formula is used: (reads + (4 * Writes)) / Number of disks = total IOPS. The formula is from MSDN. I also want to calculate the Avg Queue Length but I'm not sure where they are getting the formula from, but i think it reads on that page as avg que length/number of disks = actual queue. To populate that formula I used the perfmon to gather the needed information. I came up with this, under normal production load: (873.982 + (4 * 28.999)) / 4 = 247.495. Also the disk queue lengh of 14.454/4 = 3.614. So to the question, am I wrong in thinking this array has a very high disk IO? Edit I got the chance to review it again this morning under normal/high load. This time with even bigger numbers and IOPS in excess of 600 for about 5 minutes then it died down again. But I also took a look at the Avg sec/Transfer, %Disk Time, and %Idle Time. These number were taken when the reads/writes per sec were only 332.997/17.999 respectively. %Disk Time: 219.436 %Idle Time: 0.300 Avg Disk Queue Length: 2.194 Avg Disk sec/Transfer: 0.006 Pages/sec: 2927.802 % Processor Time: 21.877 Edit (again) Looks like I have that issue solved. Thanks for the help. Also for a pretty slick parser I found this: http://pal.codeplex.com/ It works pretty well for breaking down the data into something usable.

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