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• Do emails from ShoppyBag contain virus or malware ?

  - by Sysadmin Evstar

  I am curious -- when the ShoppyBag virus gets sent to you from a compromised "friend", inside the message is a secret one-pixel IMG unique to your email address --- and when your GMail message pulls up the message and the IMG is loaded from their server and displayed, their server knows you have read the message. At that moment, does it then grab your Gmail address book, the Flash Cookies, and all the Local Shared Objects it can find, i.e. at the instant you READ the message with the ShoppyBag virus, is it already too late? Do you have to Delete it to the Trash , then Delete Forever it , without reading it to be safe?

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• Burning Linux ISO to DVD and making it bootable.

  - by toc777

  Hi everyone, I just downloaded the Fedora 14 Live-Desktop ISO and used CDBurnerXP to burn the image to a DVD. For some reason the first time I burned the image nothing showed up on the DVD when I accessed it even though CDBurnerXP said it had successfully burned to the disk. I did it again and the ISO shows up on the disk (I don't think this is right, should it be the files inside the image that show up on disk or the image file??). The problem now is my dell PC can't find the ISO when I try to boot from it. I get an error saying it can't boot from the CD. I have verified the ISO image as directed from the Fedora website. My question is how do I make a bootable CD from a Fedora Live-Desktop ISO? How can I verify that the ISO was written to the CD correctly and has anyone had any issues booting from a CD using a Dell desktop (I'm not at home at the moment so I can't check what model it is but its old enough, I've had it for about 5 years). EDIT: All that needed to be done was to burn the image to CD as an image and not a data file. The first three times failed, I'm not sure if this was because of faulty DVD's or if the write speed was too high (16x). I put in a new DVD and changed the write speed to 8x, the image was then properly burned to the disk without any errors. Thanks.

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• How does one view the "inline docs" of a .cpp file?

  - by Mala

  I have cpp files peppered with comments such as the following before every function: /** * @brief Set the normal and expansion handshake timeouts. * * @param wm Array of wiimote_t structures. * @param wiimotes Number of objects in the wm array. * @param normal_timeout The timeout in milliseconds for a normal read. * @param exp_timeout The timeout in millisecondsd to wait for an expansion handshake. */ I assume from the format that there has to be some way of exporting this into a "friendly" format, perhaps html, which can then be read in a manner similar to the Java API. How would I do this? (I'm on Windows 7, running MS Visual Studio 2010)

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• What method of MySQL mirroring should I use for this?

  - by user45745

  I'm running an web application hosting service (basically hosting forums for free), and I have two remote servers at my disposal. The code for the application is stored on both servers and isn't a problem, but I'm wondering how to deal with the databases. When someone goes onto a site *.example-host.com, they are sent to one of the two servers and both must be capable of loading the forums from a database. The database must also have write access, for when new members register or post topics etc. The main requirement is speed, but uptime is also important (if a server goes out, the site should still work). I have a few options, but I'm inexperienced and not sure which to go with: 1) [PHP] Split the forum records 50:50 between the two servers. If a server does not have the record for a forum requested, it can request it from the other by remote MySQL and load it. This idea sounded okay, until I realised that 50% of the time, users would be waiting significantly longer for pages to load. I also realised that if one of the servers went down, half the forums would be inaccessible and registrations would have to be disabled. 2) [MySQL] Dual master replication. This would attempt to mirror the two databases and sounds perfect, but I've heard that it can be very problematic. I don't know how fast this is. 3) [MySQL] Use a standard replication, distribute read only queries on both nodes and read/write queries to the master. This sounds like a good option, but again, I'm not sure on speed. I also don't know what would happen if the master server went down. If you have any other suggestions, please post them :)

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• Solaris kstat sdX disk nread counter value decreasing

  - by mykhal

  I get strange disk io nread (bytes read) counter values (from kstat) on Solaris. Example of collected nread value for sd6 disk collected in 30s interval (command kstat -n sd6): 768579416 768579416 768579416 768579416 768579416 768579416 768579416 768496080 768496080 768496080 768496080 768496080 768496080 768496080 768496080 768530896 768530896 768447560 768447560 768447560 One would suppose that the relative read bytes count can't be negative.. I wonder what can couse this situation and whether there is more reliable disk io data available. Some info about the system: machine:~ # uname -a SunOS machine 5.10 Generic_127112-11 i86pc i386 i86pc machine:~ # cat /etc/release Solaris 10 11/06 s10x_u3wos_10 X86 Copyright 2006 Sun Microsystems, Inc. All Rights Reserved. Use is subject to license terms. Assembled 14 November 2006

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• How can I get (g)Vim to display the character count of the current file?

  - by OwenP

  I like to write tutorials and articles for a programming forum I frequent. This forum has a character limit per post. I've used Notepad++ in the past to write posts and it keeps a live character count in the status bar. I'm starting to use gVim more and I really don't want to go back to Notepad++ at this point, but it is very useful to have this character count. If I go over the count, I usually end up pasting the post into Notepad++ so I can see when I've trimmed enough to get by the limit. I've seen suggestions that :set ruler would help, but this only gives the character count via the current column index on the current line. This would be great if I didn't use paragraph breaks, but I'm sure you'd agree that reading several thousand characters in one paragraph is not comfortable. I read the help and thought that rulerformat would work, but after looking over the statusline format it uses I didn't see anything that gives a character count for the current buffer. I've seen that there are plugins that add this, but I'm still dipping my toes into gVim and I'm not sure I want to load random plugins before I understand what they do. I'd prefer to use something built in to vim, but if it doesn't exist it doesn't exist. What should I do to accomplish my goal? If it involves a plugin, do you use it and how well does it work?

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• MongoDB PHP EC2 Setup Configuration

  - by nathansizemore

  I am new to web development and server set up. I am looking for some advice or a link to a tutorial on setting up a production system up. Right now, I have a server (Ubuntu, Apache, MongoDB, and PHP). It receives a request, PHP queries Mongo, and PHP sends out the requested data. How do I make that work with more servers? I've read that you can make a cluster of a primary and two slave nodes which work as separate servers running Mongo, but do those also run PHP? Or is the primary the only one running the PHP? I have read some docs on Mongo site and a video of someone from 10gen going through it, but they are geared towards people that seem to already understand this stuff, I have no idea and need to start from a beginning stage. If anyone can help me understand where PHP (Acting as my API) lives in these clusters, that would be greatly appreciated! Thanks in advance for any help!

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• Is there an simple but good To Do Manager app for the Mac?

  - by Another Registered User

  Every morning I think about what I am going to do today. So I take a paper and start to write things like: [ ] Call Mr. XYZ [ ] Answer Support E-Mails [ ] Reduce website header height by 20 px [ ] Create new navigation bar icons And every time I'm done with something, I paint a checkmark in this square. On paper. It would be fun to have something like this as an application. But I don't want a heavy project management tool or integration with email. It should be like download, install, use without fat configuration and steep learning curve. usually I don't schedule my to do's, I just write down every day what I want to accomplish today. For my experience it doesn't make sense to plan what to do next week, because next week everything looks totally different. Would be cool if such a simple utility exists. At the moment I try just using textEdit and deleting rows which are done. With a nice interface, this would be much more fun.

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• Setting up a local mail server

  - by KriiV

  This is what I want and I am having issues finding a solution. I have a number of websites (around 5) each with an email account. I have a server at my office and I would like to centralize it. I have a workstation too. What I want to happen is for the server to receive all emails from all those websites (from the web servers) and then connect my workstation to my local server to grab the emails from there. As the server downloads the emails, I would like them to be stored. Also, if I connect another workstation, I want the 2 workstations to sync. So if an email is read on one, it shows up as read on the other. Ideas? I am able to virtualize a Linus environment if that helps.

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• Using u32 together with extension headers (how to jump over them?)

  - by bortzmeyer

  I'm trying to filter on some parts of the payload, for an IPv6 packet with extension headers (for instance Destination Options). ip6tables works fine with conditions like --proto udp or --dport 109, even when the packet has extension headers. Netfilter clearly knows how to jump over Destination Options to find the UDP header. Now, I would like to use the u32 module to match a byte in the payload (say "I want the third byte of the payload to be 42). If the packet has no extension headers something like --u32 "48&0x0000ff00=0x2800"` (48 = 40 bytes for the IPv6 header + 8 for the UDP header) works fine, If the packet has a Destination Options, it no longer matches. I would like to write a rule that will work whether the packet has Destination Options or not. I do not find a way to tell Netfilter to parse until the UDP header (something that it is able to do, otherwise --dport 109 would not work) then to leave u32 parse the rest. I'm looking for a simple way, otherwise, as BatchyX mentions, I could write a kernel module doing what I want.

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• Non-volatile cache RAID controllers: what kind of protection is there against NVCACHE failure?

  - by astrostl

  The battery back-up (BBU) model: admin enables write-back cache with BBU writes are cached to the RAID controller's RAM (major performance benefit) the battery saves uncommitted and cached data in the event of a power loss (reliability) If I lose power and come back within a day or so, my data should be both complete and uncorrupted. The downside to this is that, if the battery is dead or low, OR EVEN IF IT IS IN A RELEARN CYCLE (drain/charge loops to ensure the battery's health), the controller reverts to write-through mode and performance will suffer. What's more, the relearn cycles are usually automated on a schedule which may or may not happen in the middle of big traffic. So, that has to be manually disabled and manually scheduled for off-hours if it's a concern. Annoying either way. NV caches have capacitors with a sufficient charge to commit any uncommitted-to-disk data to flash. Not only is that more survivable in longer loss situations, but you don't have to concern yourself with battery death, wear-out, or relearning. All of that sounds great to me. What doesn't sound great to me is the prospect of that flash module having an issue, though. What if it's completely hosed? What if it's only partially hosed? A bit corrupted at the edges? Relearn cycles can tell when something like a simple battery is failing, but is there a similar process to verify that the flash is functional? I'm just far more trusting of a battery, warts and all. I know the card's RAM can fail, the card itself can fail - that's common territory, though. In case you didn't guess, yeah, I've experienced a shocking-to-me amount of flash/SSD/etc. failure :)

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• Reading S.M.A.R.T. statistics on an ESXi?

  - by leeand00

  Is it possible to read S.M.A.R.T. statistics on harddrive in an VMWare ESXi? When I did a backup last night I received an error message that didn't really seem to indicate if the error came from the local drive I was backing up to, or the remote ESXi Virtual Machine's E:\ drive I was backing up from caused the error. When this happened I ran chkdsk on the local drive and on the remote virtual drive. It seems like it worked, I'm no longer getting the error, but if it is something serious, I'd like to know about it before the drive fails. I've already hooked up the backup drive to my system so I can read the the S.M.A.R.T. statistics, but I have no idea how one could do this on a ESXi.

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• PHP's page generation time takes 0.01s. 1/0.01 = 100; however i'm having problems reaching that number of request per seconds. Why?

  - by cedivad

  On average, my PHP page generation time is 10ms. So i should be able to execute 100 requests one after the other one (using a single core on the server, since that php is not multithreaded). However, i'm having problems reaching 50 pages per seconds. As of now i do 25 on avg., with a medium load. The application is really light, it consist in a read (<5KB) from a pool of SSDs, some read queries solved by indexes. Where should i look to solve this bottleneck?

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• Why can't I install MySQL on my computer? [closed]

  - by Bea

  I have read a lot of tutorials, but I am still having problems. What I tried: I downloaded mysql-5.5.9-winx64. All that I read says that I can run Setup.exe, but there is no such file in the download. The other option I know there is, is including \mysql-5.5.9-winx64\bin in the PATH variable and then trying to execute the mysql command. When I do that, the error I get is: ERROR 2003 (HY000): Can't connect to MySQL server on 'localhost' (10061) I then downloaded mysql-5.5.9-winx64.msi, which is easier to install, but once I followed the instructions and it was installed, I got the same error executing the mysql command. How can I use MySQL? EDIT: I've now removed everything I installed, and I want to start from scratch.

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• Unix / linux permissions setup for shared hosting with Apache

  - by weiyin

  I'm in the process of setting up a server from a clean CentOS 5 install. What is the best permission structure (users, groups, unix permissions) for running a single instance of apache for multiple users? Ideally, it should satisfy these requirements: Each user's websites are stored in a subdirectory of their home directory. Users can edit files and permissions. Apache can read the websites of all users. No user can read the website files of other users. Bonus question: how to add PHP and/or Perl and/or Ruby to Apache without allowing any users to access any other user's files?

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• SHOPPYBAG virus

  - by Sysadmin Evstar

  I am curious -- when the ShoppyBag virus gets sent to you from a compromised "friend", inside the message is a secret one-pixel IMG unique to your email address --- and when your GMail message pulls up the message and the IMG is loaded from their server and displayed, their server knows you have read the message. At that moment, does it then grab your Gmail address book, the Flash Cookies, and all the Local Shared Objects it can find, i.e. at the instant you READ the message with the ShoppyBag virus, is it already too late? Do you have to Delete it to the Trash , then Delete Forever it , without reading it to be safe?

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• How do I sync a subset of tables between two databases on the same mysql database server

  - by Mike

  would like to be able to sync a subset of tables between two mysql databases that are running on the same server. One of the databases acts as the master where inserts, updates and deletes can be made. The second database uses those same tables for read-only operations. I do not want to use federated tables to achieve this. The long term goal will be to separate the 2 databases to multiple servers, The second database that has the subset of tables as read-only may also be replicated a few times over to distribute geographically for load and performance purposes each with unqiue data.... Once that is achieved, I plan to use binlog to replicate those specific tables on the secondary databases. In the meantime, I'd like to keep these tables in sync. Is there a more elegant way to do this than other than using a cronjob and mysqldump?

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• Songbird very slow, freezes

  - by Cawas

  I've read on few places that Songbird is no good with more than some thousands of library items because it starts getting quite slow. Well, in my case (which is a clean install) I've imported 17k items (which I know is not that much) and instead of becoming just too slow it frequently gets to not responding for several minutes until getting back to its senses again. That's for whichever random operation such as deleting 1 item from library. I've also read on few more places that gives very little hope on fixing this issue, but I wonder... Is there any way to tweak it and make it work as fast as expected? Am I missing something or is the software just not intended for libraries with more than 10 thousand thingies?

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• Is it possible (and how if it is) dump two concatenaded disks in a new disk using DD?

  - by pedromarce

  Hi, I have a Lacie enclosure that has a setup with 2 500gb disks configured as 1 drive of 1TB, the only partition created for the whole drive is HFS+ journaled, but the controller in the enclosure is gone and so the drive refuses to mount anymore. I have been able to remove those two disks from the enclosure and connect them using USB ports and a program called R-studio (Raid recovery program) check that the setup the controller in the enclosure was using was both disks concatenated (Not Striped). And so configuring that option in R-studio I could be able to get back all the information. But before I got a license for r-studio for just one use, I would rather buying a new 1TB disk and try to write all the information of those two disks in this new one. I can use Mac or linux machines to do it, and I think it should be ok use DD command in linux to concatenate those two drives into the new one in the right order to get it working again in the new disk and I will reformat the old ones, but I am not sure. So, is it possible in this scenario to write both disks into a new one using DD? Any hints how the command would look? Thanks,

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• can power supply affect I/O

  - by user101289

  I have a dev server machine running Ubuntu 12.04. For a long while it's been throwing intermittent errors where it would suddenly tell me "File system is read only" or drop into a GRUB error console on boot. I've done disk checks, bad blocks, etc. and no real problems with the main SATA drive were detected. Finally the drive would not be detected at all-- but neither would other drives I plugged in (via SATA). I plugged the supposedly "bad" drive into another server and it worked fine, no issues, for days-- so I assumed the motherboard had a bad SATA controller, and replaced the motherboard with an identical model. I replaced the drive into the original machine with the new motherboard, rebooted-- and the same issues-- I/O errors, failure to read the drive at all, dropping into GRUB, etc. I'm wondering if there could be some other issue with this machine, that's not related to the drive-- possibly power supply? Thanks for ideas

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• Opera 11 - prevent panels/tabs opening when examining RSS feeds

  - by Damien_The_Unbeliever

  I've reviewed the suggested questions, based on my title, so apologies if I'm going over old ground. Opera 11 recently came out. Whilst I use it as my RSS aggregator, I don't use it for any other messaging purposes. So I'm annoyed with, whenever I open Feeds-Read Feeds, I suddenly get the panels side menu, and the Mail panel opened automatically. This is new behaviour from the 10.x series, and I can't seem to find an option to turn it off. When I go to "Read Feeds", I just want the feeds window to open. That's it. Any ideas?

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• Scaling web application with SQL Server 2008 database

  - by John

  I have a database which has 90% of read only tables. 10% of the tables has writable data. We need to scale the ASP.NET application.We need to add more users who will not be writing to the database. We are thinking of adding another server and routing the users who need read only access to that server. Is there a way to replicate just some tables to another database server. Since the 90% of data doesnt change, we don't want to setup any full database replication. Please advise.

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• Looking for VCS wrapper that tracks system files changing across the whole *nix OS and sends diffs through email

  - by nextus

  I need some software that looks after custom directories across the whole OS (i.e. /etc) and alerting me if someone edit something file inside. Additionally, this tool must automatically commit and push changes into backup server, so I can easily determine when specific change in specific file was made. I'm using cvsbackup right now but I want to create or found something more modern. I think using git as VCS is a great idea. I could have local repository and easily revert changes in my configuration files. Furthermore, pushing changes to the remote repository would helps me to recover my configuration files when the server is fault. It doesn't seems difficult to write some wrapper around the git but there are a lot of problems. For example, I need to track custom directories: /usr/local/nginx/ and /etc/. So the destination point for my git repository is /. I don't need to track the other directories so I must to write overwhelming .gitignore rule: * !.gitignore !/etc/ !etc/* !/usr /usr/* !/usr/local /usr/local/* !/usr/local/nginx !/usr/local/nginx/* It's very daunting and prone to error. So it's maybe a good idea to create intermediate file that wrapper reads and converts to .gitignore format. Additionally, I don't want to keep my .git folder in / partition so I need to set appropriate GIT_DIR and GIT_WORK_TREE variables for git. Is there any ready to use tools for implementation this task? I don't found any but I don't believe that no one needs this feature.

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• iSCSI logout Input output error

  - by liuzhijun

  203 hava a iSCSI target named poolA that I am trying to log into using this command: iscsiadm -m node -T poolA -p 192.168.0.203 -l I am trying to use it as a vg. Secondly, I create two lvs on this vg, and lastly, I logout: iscsiadm -m node -T poolA -p 192.168.0.203 -u After I execute lvs, the following error occurs: /dev/dm-2: read failed after 0 of 4096 at 0: Input/output error /dev/dm-5: read failed after 0 of 4096 at 0: Input/output error Can I get around this error without a reboot? Thanks!

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• Unable to load directory when using jar [on hold]

  - by user1630359

  I've a directory in my eclipse project, in build path which contains files (txt). Now, when i run the application from eclipse, i can read the files (using #1 below). but, when i export my application to jar and run it from other pc i can't read the files or even check whether the directory exist or not. All the below lines are always return NULL! 1. File dir = new File("files"); 2. File dir = this.getClass().getResourceAsStream("files"); 3. File dir = this.getClass().getClassLoader().getResource("files"); any assistance will be appreciated! Thanks!

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