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• UID uniqueness of IMAP mails

  - by SecStone

  In our internal webmail system, we'd like to attach notes and contacts to certain mails. In order to do this, we have to keep track of every mail on our IMAP server. Unfortunately the IMAP standard doesn't enforce the uniqueness of the UID of a mail in a mailbox (just in subfolders). Is there any tool/IMAP server which generates UIDs which are truly unique? Or is there any other way how we can identify each mail? (the Message-ID header field is not unique as some mails do not contain such a field). Additional resources: Unique ID in IMAP protocol - Limilabs.com

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• How to generate good serials for DNS zones with Puppet?

  - by Bittrance

  My tradition is to set all zone serials to the timestamp at modification. Now that Puppet is my new religion, I want to set serial timestamps when building zone files from exported resources. A somewhat trivialized example may look like this: file { "/tmp/dafile": content = inline_template("<%= Time.now.to_i %>"), } The problem with this approach is that content will be different all the time, which will (ultimately) provoke rebuilding of zone files on each puppet config poll. Is there some way I can insert a timestamp without it being included in the data that is compared against previous state?

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• How do I get a PDF link in a Word document to open in the default browser?

  - by Tweek

  I'm trying to create a Word document with links to resources on the web. If I create a hyperlink to a regular HTML file, when I click on the link, it opens in my default browser (Google Chrome) as expected. However, if I click on a link to a PDF file on a website, it opens in Internet Explorer. Before it opens, I also get the following prompt: Microsoft Office Opening http://www.example.com/example.pdf Some files can contain viruses or otherwise be harmful to your computer. It is important to be certain that this file is from a trustworthy source. Would you like to open this file? OK Cancel I'm using Office 2010, but I'm asking for a user who is using Office 2007 and is experiencing the same issue. (His default browser is Firefox.) We're both on Windows 7.

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• Uploading to YouTube makes all browser tabs and devices disconnect

  - by fabsenet

  Whenever I upload a video to YouTube all other browser tabs behave like there is no connection at all. It even affects my phone and other computers on the network therefor I think it has to do with my router. When the upload is done everything works normally again. I never observed this behavior with any other upload. My router is a Fritz!Box 7390 and my uploading PC is connected through a 1000mb/s switch (wired) to the router. Uploading through another browser does not change anything. I understand that other sites become slow as the network resources are limited, but stopping altogether feels wrong. speed.io measures for my internet connection: 40.894 Kbit/s down, 2.685 Kbit/s up, 29 ms ping, 2.048 con/m connects

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• Somebody knows why the sectors of the IBM floppy disk are named 1 to 8 (and not 0 to 7 )

  - by Olivier Briand

  I am now programming on a 8 bits Z80 computer with CP/M 2.2, (as a hobby) and the floppy disk format is IBM, 40 tracks, 8 sectors per track, 512 bytes per sector. free space is 154 Ko on each face of the disk. Why the sectors are indexed 1 to 8 (and not zero to seven, as usually is seen with computers)? The catalog of the floppy disk is on the track 1 (sector 1 to 4, 64 entries). I'm wondering is the catalog on track zero? Is the zero track reserved to included a system (as track 0 & 1 are reserved to the system on a CP/M floppy disk, and catalog is on track 2)?

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• How do I scale EC2 and push out code / data to my instances?

  - by chris

  Unfortunately I only have a limited knowledge of server architecture, I come from a development background. I am looking to ensure my new app can scale properly using EC2. I currently have a T1.micro for development running Windows with SQL server 2008. The system allows students to come to our site to search for a mentor, update their profile with pictures and employment history etc. Roughly the same sort of work as a LinkedIn profile. I need this to be able to scale very quickly without wasted resources. I understand the following is important. Separation of data, application etc. I will achieve this I think by hosting images using S3, Database instance via RDS and upgrade the EC2 instance. My main question is: How do I push data / code out to multiple ec2 / RDS instances seamlessly?

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• error when using OWA access to mail server exchange 2010

  - by e0594cn

  Suddenly it will come out the below error when accessing the exchange 2010 mail server using OWA after clicking sign in button on initial page? ***The website cannot display the page HTTP 500 Most likely causes: •The website is under maintenance. •The website has a programming error. What you can try: Refresh the page. Go back to the previous page. More information This error (HTTP 500 Internal Server Error) means that the website you are visiting had a server problem which prevented the webpage from displaying. For more information about HTTP errors, see Help.* Any suggestion? Thanks!

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• multiple servers porting to each other

  - by JackLeo

  hello, here is the details: theres is who "servers": VPS with ubuntu 10.10x32 and home pc, win7 on win7 apatche2.2 is running with webpage on VPS game server is running DNS forwards www subdomain to PC, and everything else to VPS (all via ip) I can not configure DNS directly, my providers do Wanted result: DNS forwards everything to VPS, VPS redirects *:80 to PC when viewing page stored in PC domain is shown normaly Questions: How to achieve that using as minimal resources as possible? Is it possible just tel my DNS provider to fix it that :80 port is in different ip? P.S. its for my friend, i do have some apatche and VDS configuration exp. More of a programmer i am. so trow everything you can ;)

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• How do I install eclipse 3.5.1-0 ubuntu7?

  - by Jeune

  I am very new to linux and I do some programming for school in Eclipse. However I stumbled upon bug in eclipse and the suggestion was to install eclipse 3.5.1-0 ubuntu7 using Synaptic. I opened synaptic but it said that the latest version was just eclipse 3.5.1-0 ubuntu3 so installed it anyway however the bug is still there and I'd like to install eclipse 3.5.1-0 ubuntu7 but I don't know how since Synaptic insists that the latest version is ubuntu3. I am using Linux mint btw. A bug report of the bug I am experiencing can be found here

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• Google Chrome Automatically Save Passwords

  - by benhc911

  I have seen, and at one point implemented, methods of modifying firefox's password manager popup such that it would automatically save usernames and passwords without prompt. I was wondering if there is a similar feature for Chrome. I just recently switched to chrome and it is one of a few features/modifications that didnt survive the transition, and while I am moderately capable in programming in certain languages (C+, visual etc) I don't really feel confident enough to muck around unguided. For anyone that is particularly interested, the other features I miss are things such as the slash based 'quick search' in firefox... and I am currently annoyed by a different right click menu order for opening in new tabs and new windows (the reverse of firefox). Any help would be greatly appreciated!

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• How much data does windows write on boot

  - by soandos

  This question was inspired by Bob's comment to my answer here. On boot, windows writes files to the hard drive (I imagine this to be the case, as it has a way of detecting if the boot was previously interrupted by a hard power-off, and I am sure many other things). But assuming that there is a "smooth" boot, where there are no error, etc, and no logon scripts that run, and things like that, about how much (a few KB, a few MB, a few GB) data gets written to the drive? For simplicity's sake, assume that: hibernation is turned off windows 7 pagefile is turned off (does this matter right at boot, or only later?) How could one go about measuring this? Are there resources that have this information?

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• How to configure LAMP server for iOS social/chat app?

  - by andufo

  I'm on the last developing phase of a social networking app for iOS that has a chat module. Right now I'm trying to figure out the best way to achieve these features: Send message instantly to another user. If other user is online, delivery should be instantly. If user reads the message, the remitent should be notified of that action. If a user visits my profile, I should be notified instantly. What would be, in your opinion, the best approach to achieve that experience? The server is CentOS 5.6. I've previously reviewed XMPP, sockets, but I'm still unsure on what the best approach is. Any opinions and resources will be much appreciated.

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• Is it possible to view Facebook news feeds page by page rather than loading it all as I scroll?

  - by oscilatingcretin

  If you want to scroll through your Facebook news feed (be it on the main feed, your personal feed, or in groups) to older parts, you have to scroll to the bottom, wait for the ajax load of the next part of the feed, and repeat. The problem with this is that, if you're scrolling down very far, the HTML document just gets bigger and bigger until your browser starts to die due to the overload of resources brought on by added HTML, text, and even images. This pretty much sets a limit to how far back you can scroll. Clicking on months and years on your personal feed has the same effect of cumulatively adding feed segments to the HTML document. I notice that this month/year feature is not available on the main feed and for groups. If there were a way to literally page through the feed so that only a single page's worth of feed data is loaded at a time, that would make scrolling through it much more doable.

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• ESXI with non standard hardware HDD issues

  - by Hurricanepkt

  I have 3 very underutilized servers that I am condensing to one of those shuttle PC's with VMWare ESXi The HDD seems to be the bottle neck right now (the light is almost always pure solid) right now I have a single 1TB Seagate 7200.11 connected by SATA. VMWare ESXi cannot detect it when running in AHCI mode, but does when running in IDE mode. I have read that IDE mode can give a 5% performance hit which might give me enough breathing room. However, I am open to setting up an external eSATA or some sort of raid to give me more than just the 5%. I am just weary of sinking some money into a bit of hardware without knowledge of whether it will work. Does anyone know of resources or procedures of how to get this working.

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• What is the lightest, basic Email Server for Linux?

  - by Xeoncross

  I would like to install an extremely small mail server on my VPS and I am only interested in it sending out mail (activation links) from my web site. I don't need it to support mailboxes or incoming mail (although having that option for the future might be nice). The main requirement is that I don't have to worry about monitoring it as often and protecting against people bouncing messages off my server or wasting resources with incoming mail. I just want to send mail out. So something small that only listens on localhost would be ideal. The other requirement is that it is documented so I can learn how to set it up and manage it.

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• How to move a windows machine properly from RAID 1 to raid 10? [migrated]

  - by goober

  Goal I would like to add two more hard drives to my current RAID 1 setup and create a RAID 0 setup on top of the two RAID 1 setups (which I believe is referred to as "RAID 10"). Components Involved Intel P68 Chipset Motherboard 4 SATA ports that can be configured for Raid An intel SSD cache that sits in front of the RAID, and a 64 GB SSD configured in that manner Two 1TB HDDs configured in RAID 1 OS: Windows 7 Professional Resources Consulted so far I found a great resource on LinuxQuestions.org for a good "best practices" process for Linux machines, but I'd like to develop a similar process that I know works on Windows Machines.

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• Error 18446744073709551615 when running iptables in OpenVZ container

  - by xsaero00

  This is related to the question I asked before. Now I am getting a different error. iptables: Unknown error 18446744073709551615 when trying to apply a simple rule in VZ container iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8080 I have done everything that was suggested to do on hardware node and container but the error persists. On hardware node: /etc/sysconfig/iptables-config IPTABLES_MODULES="ip_conntrack_netbios_ns ipt_REJECT ipt_tos ipt_TOS ipt_LOG ip_conntrack ipt_limit ipt_multiport iptable_filter iptable_mangle ipt_TCPMSS ipt_tcpmss ipt_ttl ipt_length ipt_state iptable_nat ip_nat_ftp" /etc/vz/vz.conf IPTABLES="ipt_REJECT ipt_tos ipt_TOS ipt_LOG ip_conntrack ipt_limit ipt_multiport iptable_filter iptable_mangle ipt_TCPMSS ipt_tcpmss ipt_ttl ipt_length ipt_state iptable_nat ip_nat_ftp" /etc/rc.local modprobe xt_tcpudp; modprobe ip_conntrack; modprobe xt_state container config IPTABLES="ip_tables iptable_filter iptable_mangle ipt_limit ipt_multiport ipt_tos ipt_TOS ipt_REJECT ipt_TCPMSS ipt_tcpmss ipt_ttl ipt_LOG ipt_length ip_conntrack ip_conntrack_ftp ipt_state iptable_nat ip_nat_ftp " I have restarted HN and container numerous times, but the error is still there. It seems like all config is in place but something like lack of some resources is preventing the rule from being applied. Thanks for any help.

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• NAS device for distributed team

  - by user5959

  We are a distributed team spread across 5 locations. We have a shared drive (1 TB data) at our former location that we are currently accessing via Hamachi VPN. Our shared drive is a network folder on a Windows Server located at one of our locations. The current connection speed is terrible. The upload speed at the current location of the shared drive is very slow. We looking for a NAS device that we can host at another location with better upload speed that all of us can access. I am looking for a NAS device that has these features: Minimal Maintenance as we do not have dedicated IT resources Access data on the device from multiple locations. Ability to create network drive (On Windows Computers Map Network Drive) Upload data from random client computers without having to install software. (Right now, we use LogMeIn Rescue's file manager) Ability handle slow or dropped connections when transferring files (Maximum size 1.5 GB)

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• What is the best way to compare vhost traffic?

  - by Bob Flemming

  Recently one of my servers has been subjected to malicious ddos attacks. I have about 12 websites hosted on the server which uses name based v-hosting. I am trying to identify which virtual host(s) are getting bombarded with traffic. I have used tools such as iftop which is good for identifying hosts which are consuming lots of bandwidth, and also apachetop which is useful for identifying which resources are being requested on a single v-host. What I really need is a tool which allows me to see the amount of traffic being received by each v-host in real time so I can easily see which v-host is being targeted. Does such a tool exist?

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• Need to configure multiple default gateways for four seperate physical network ports for a FreeBSD Webserver

  - by user20010

  I need to configure default gateways for four separate physical network interfaces for a FreeBSD Webserver. Basically, this is a web server that needs to be accessed by multiple WANS. I've been using various online resources, and a combination of setfib, pf, and ipfw. This web server will be deployed in multiple sites where access to next hop router info is not available, so we can't use static routes. We've used setfib to successfully create multiple routing tables and can ping beyond every default gateway we've created. Using setfib # ping ip.addr.what.ever we can ping anything available on a wan and beyond the router. The problem is we can't get Apache web server (port 80) traffic to route out when external users access the server(box). Multiple people have examples of binding setfib to ipfw commands, but none of them seem to work.

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• Hosing website on own server. What is Hardware requirement and Cost [closed]

  - by KuKu

  As i am about to finish my dream website, i need to host it on some server. I checked Amazon AWS Free Tier, i found it pretty complex. As i made full website in java(JSP + Servlet + mysql + Node.js), its been expensive to host. So i thought that why not to host on own server so that i will be fully dependent on my resources, not on any one else. And i know, in future i need to pay more and more to the other hosting company(because of uploading images and number of incoming users). So my question is, On initial stage what kind of hardware i will required. What can be the cost of that hardware? I already have 12MBPS broadband connection, will it be sufficient? It has static IP Address as well.

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• Graphing per-user CPU usage on a Linux machine

  - by mart1n

  I want to graph (graphical output would be great, i.e. a .png file) the following situation: I have users A, B, and C. I limit their resources so that when all users run a CPU intensive task at the same time, those processes will use 25%, 25%, and 50% of CPU. I know I can get the real-time stats using top but have no idea what to do with them. I've searched through the huge top man page but haven't found much on the subject of outputting data that can be graphed. Ideally, the graph would show a span of maybe 30 seconds. Any ideas how to achieve this?

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• Does PCI bus really occupy 1.8GB

  - by Neil

  I am using a Dell Vostro 1700 laptop which currently has 2GB of RAM. I was considering buying some more memory to upgrade it to 4GB. I am running 32 bit Windows Vista and I know that there can be issues that prevent it from making use of a full 4GB which I believe relate to the fact that memory mapped devices, e.g. graphics card, also need to be allocated addresses in the 4GB range addressable with 32 bits. Consequently I was looking at device manager - resources by connection - memory to see what devices where allocated what memory addresses. I was surprised to see that there was an entry for [80000000 - F3FFFFFF] PCI bus. That is a 1.8GB range of addresses. When I expanded it the only thing in it was [E0000000 - EFFFFFFF] NVIDIA GeForce 8600M GT which is only 256MB. So my question is does the PCI bus really occupy 1.8GB of address space and will it prevent my computer from making use of any more memory than it already has.

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• How can I open a port in OS X 10.6?

  - by Ian

  Mine is MacBook Air, so I cannot plug to the modem directly. And I do want to turn my firewall off. How can I specify to open a port, like port 56789 in Mac OS 10.6.8? I know in old Mac OS, there is a option for me to specify a custom port. But I cannot find it in OS X 10.6.8. In System Preferences / Security / Firewall, I only can allow an APPLICATION to access a new port. However, now I'm programming, using a new port. So, it seems not suitable for me. So, can I simply open a port instead of using an Application to open a port?

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• Disable address bar in Internet Explorer 9

  - by token

  I'm trying to disable the address bar in IE9. I've done a significant amount of searching on this and just can't seem to find a way to make it happen. A lot of web resources discuss how to do it in IE8, but not IE9. The reason you might ask? I have an application being hosted in a remote desktop farm that links to web pages outside of the application into Internet Explorer. I need to ensure users are limited to just going to the pages the program pushes them to. I realize I could use a proxy server to limit where they can go, but I'm trying to find a really simple way to just disable the address bar instead. I can't use Kiosk mode because it puts the browser into full screen mode. This won't work for my situation as I need to give users what appears to be a regular browsing experience without an address bar.

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