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• Mysql Master-ColdMaster

  - by enedebe

  I explain my case: I'm at Amazon AWS and I want to be fault tolerant on a entire region failure. My basic problem is to have the db in sync with 2 regions. My options: Master-Master (high lag) Hand made sync every 5 minutes Master-ColdMaster?! (copy on the fly but Master won't wait the other region commit) In my system we could afford loosing a piece of data (we're not a bank) the last inserts in the db, but we could not afford more than 10 minutes of downtime. The database is small and the level of inserts is low, and I wouldn't affect the normal usage waiting other region commit. Is the 3 solution posible? And the most important, once the primary fail how we can detect and change the rol between master-coldmaster -- coldmaster-master ? Is there any clean-mode to restore between failure? Thank's!

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• Access permission /opt/ in Ubuntu

  - by user1201239

  I want to access my /opt/ folder I have found following commands for giving access permission. But not sure what is the purpose of this commands which one is the better to use it to maintain security and access permission both. Please explain me the purpose or what this different numbers means in security permission ? here are they , sudo chmod 755 -R /opt/ sudo chmod 755 /opt/ sudo chmod 775 /opt/ sudo chmod 777 /opt/ I dint know these commands so what I use to do previously was "gksudo nautilius" then rightclick- change the owner from root to current usergroup But now as I have found this commands I would like to know Which one should i use ? and what they do ?

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• Exporting a VM running as a Domain Controller

  - by AndyM

  There is a Microsoft KB article that talks about best practices for running a DC on a VM. One of the notes is "Do not use the Export feature on a virtual machine that is running a domain controller". In order to export a VM, the VM needs to be turned off. If you turn off a DC VM, export it, import it on another server and then power the VM back on, there should be no risk as long as the original (exported) VM is never powered back on. Can someone explain to me why this isn't supported? After doing some searching on Google, the sites I found just regurgitated this line from the KB article, but didn't offer any explanation as to why this isn't supported.

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• Cannot increase my screen resolution

  - by Patrick Beardmore

  I am trying to install my new monitor but my Graphics Adapter (Mobile Intel(R) 915GM/GMS,910GML Express Chipset Family) does not offer a resolution of 1920x1080 in the [Display Properties Settings] window. It only offers up to 1360x768. Can anyone explain to me how I can increase this number to the correct resolution. The monitor does show my the windows desktop, albeit at a lower resolution which is being stretched to fill the screen, making it look very blurry. I have installed the "Monitor Drivers" I found on the disk supplied with new monitor, but these do not appear to have made any difference. The Intel software that comes with the graphics card has an information window containing lots of info about the card and the monitor itself. I have placed this on a webpage so you can examine it if helpful. Many thanks with your help in getting my Christmas present to work! Patrick P.S.: Before I got this screen I checked to see if my graphics card could cope with such a large screen.

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• Why my dns server ip got blacklisted instead of my email server ip?

  - by Khurram Masood

  We are hosting our own dns server our scenario is as under; dns ip: a.b.c.1 fqdn:ns1.example.com ------ reverse lookup to a.b.c.1 mail server ip a.b.c.2 mail.example.com ------ reverse lookup to a.b.c.2 smtp.example.com ------ no reverse lookup pop.example.com ------ no reverse lookup web server ip a.b.c.3 example.com ------ reverse lookup to a.b.c.3 www.example.com ------ no reverse lookup a few days back our dns server ip got blacklisted and all our services were down from outside. We had also added a new dns server on a separate network that caused our domain and machines with same names as above to resolve on different ips, can this b a cause of being blacklisted? But all blacklists points towards spamming. Can anyone please explain why my dns ip got blacklisted instead of my email or web server ip?

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• Alt-tab icon list in Gnome and metacity?

  - by Vinh Nguyen

  Can anyone provide a reference or explain how the icons to the alt-tab list is populated? I would like to specify some icons for some programs that do not have icons, e.g. xterm. I'm using Ubuntu 11.04 with Gnome 2 (Ubuntu Classic) and metacity as the window manager. I did see this thread that mentions /usr/share/pixmap/, but if I use cp gnome-terminal.xpm xterm.xpm the icon was not populated in the alt-tab icon list (even after a logout/login). I do see that the icon is populated when I added the xterm command to the Program Menu.

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• What did Emolator do with My Laptop?

  - by Garry

  I played SEGA with my KEGA.exe (Sega Emulator) and it made my right key to be malfunctioned. Befor that day, I had played it, too in my notebook with fullscreen mode, and suddenly my ACER Aspire One notebook restarted during that emulator was running and before the screen was black (boot), my screen was blue with many words but I couldn't read them, but I remember that there was a word like 000000 x 0000000 x 000000 and bla bla bla. And when I played without fullscreen mode, It didn't happened but it made my right key to be malfunctioned until when I went to Bot setup, my right key doesn't work. Do U know what is the problem of my emulator? Can U explain me for that?

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• Distributing application updates using SCCM 2007

  - by theraneman

  Hi all, If there are any System Center Config Manager (SCCM) users out there, please clarify my doubt here. I have used the ConfigMgr console to distribute a custom application to a client machine. Now I need to distribute some updated files of that application. Isnt's it possible to add those files in the same package source used earlier and advertise again? Or should I use the SCCM software update section for this? Not sure if its only me, but the Software distribution process looks much easier than the Software Updates process in SCCM 2007. Please do let me know if there any online tutorials which explain how to update a custom application. Any help much appreciated.

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• Software Engineer's explanation of Facebook photo privacy, with UML diagram?

  - by Alex R

  Facebook photo privacy is more complex than most people think - including the bloggers who fill the Internet trying to explain it in simple terms. Not only there is the basic album-level privacy setting to consider, but also what happens with Tagging (and related privacy settings) as well as the Share button when clicked by a Friend. Has anybody seen a good, engineering-type (e.g. UML) diagram? I envision it should include the various privacy "states" a photo can be in, what causes state transitions, and the characteristics of each state? Thanks

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• Excel CSV import treating quoted strings of numbers as numeric values, not strings

  - by MichaelOryl

  I've got a web application that is exporting its data to a CSV file. Here's one example row of the CSV file in question: 28,"65154",02/21/2013 00:00,"false","0316295","8316012,8315844","MALE" Since I can't post an image, I'll have to explain the results in Excel. The "0316295" field gets turned into a number and the leading 0 goes away. The "8316012,8315844" gets interpreted as one single number: 83,160,128,315,844. That is, most obviously, not the intended result. I've seen people recommend a leading single quote for such cases, but that doesn't really work either. 28,"65154",02/21/2013 00:00,"false","'0316295","'8316012,8315844","MALE" The single quote is visible at all times in the cell in Excel, though if I enter a number with a leading single quote myself, it shows just the intended string and not the single quote with the string. Importing is not the same as typing, it seems. Anybody have a solution here?

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• Files turned into folders on external hard drive

  - by Kashif

  I have a networked hard drive where I like to store audio/video/software and all sorts of other files for my house. While the software files are all intact and working, many of my video and audio files have been turned into folders! Can anyone explain why this is happening, how I can prevent it, and if it is possible to revert these "folders" back into files. Thanks much! An example of what the folders are named: "Highschool Graduation.avi", "Birthday party.avi", "Somesong.mp3" The HDD is connected to a Linksys E4200 router (Firmware Version: 2.0.37). This is how the HDD is networked.

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• Routing Traffic on Ubuntu to give Raspberry PI Internet Access

  - by Scruffers

  I'm hoping someone can point me in the right direction for setting up my Linux (Ubuntu 12.04) box to route traffic from eth0 to wlan0. I'll try and explain the problem I am trying to solve: I currently have two separate networks: [RaspberryPi/eth0] 192.168.2.2 / 255.255.255.0 ^ | v [Ubuntu/eth0] 192.168.2.1 / 255.255.255.0 And: [Ubuntu/wlan0] 192.168.1.100 / 255.255.255.0 ^ | v [ADSL router] 192.168.1.1 / 255.255.255.0 So currently if I want to access the RaspberryPI I can SSH from the Ubuntu box to the PI. And if I want to use the Internet, I have full access from the Ubuntu box, but nothing from the RaspberryPI - the two networks are partitioned. What I would like to do is configure things so that the RaspberryPI has Internet access via the Ubuntu box and out to the Internet. I tried to create a bridge, but got the message "wlan0: operation not supported" (wireless chipset is Ralink RT3062). I'm sure giving the Raspberry PI Internet access should be easy to do in this configuration, but I am a bit lost - can someone point me in the right direction please?

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• ActiveDirectory - LDAP query for objectCategory unexpected results

  - by FinalizedFrustration

  AD is at 2003 functional level, some of our DC's are running Windows Server 2003, some are 2008, some are 2008 R2. When using the following query: (objectCategory=user) I do not expect to see any result where the objectCategory attribute is equal to 'CN=Person,CN=Schema,CN=Configuration,DC=Contoso' I expect only objects where the objectCategory attribute is equal to 'CN=User,CN=Schema,CN=Configuration,DC=Contoso' However, the query does indeed return all objects with the objectCategory attribute equal to 'CN=Person,CN=Schema,CN=Configuration,DC=Contoso' My question then is this: Why do I see the search results that I do? Does AD actively translate queries that include (objectCategory=user) to (objectCategory=Person)? I have looked at the schema definitions for both the Person and the User class, but I cannot see any reason for the query results as I am experiencing them. I know that the User class is a subclass of the organizationalPerson class, which is a subclass of Person, but I can't see an attribute value that would explain this translation.

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• Recommend a mail server setup for multiple domains

  - by Greg

  Hi all, I've just set up a new Debian web server which I have done plenty of times before, but I want to add a mail server which I have never done before. I am aware of this question, but I would like someone to recommend packages and briefly explain how to use them for providing pop/imap access on multiple domains, a concept that has confused me for a while. I'm planning for this server to grow slowly but surely, from serving an initial 5 or 6 domains to about 20 in the first year, continuing at this rate. (yes, I've jumped on the cloud bandwaggon). At the moment, I have a DNS-A record pointing to my server's IP and nothing else. I'm assuming that I need a DNS-MX record pointing there too, but I haven't read up about it yet so today that's what I'll be doing. Hopefully reading up on the subject and the help that I get here will get my server up and running in no time. Thanks!

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• Running "ipconfig /displaydns" in cmd prompt still displays results even after I run "ipconfig /flushdns"

  - by 400_THE_CAT

  Whenever I run "ipconfig /displaydns" I get a long list of sites even after running "/flushdns." I thought my results should be empty considering /flushdns. Is this normal behavior? I also noticed that after I run /flushdns and browse the internet for a couple of hours, my list of cached sites doesn't really change. Google.com, for example isn't on the list but a bunch of sites I've never visited do show up in my DNS cache. Can someone explain this?

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• Debian is equal to Ubuntu

  - by rkmax

  The title of the question is confusing, and does not explain my point well. I've always used Ubuntu server from version 10.04 and never had problem, now I have 4 machines with ubuntu 12.04.1 LTS installed on them and I found that under any circumstances where there is a high burden throws me a problem and machine crashes constantly. the most common is CPU#X stuck for Ns! Now I wonder if the administration of Debian is equal to that of ubuntu, regarding Servicos, packages, folders structure for example I would like to know if the services are installed in the same manner using invoke-rc.d, which handles additional security, including for not giving blind caning. I've been looking for a comparison chart but have not found anything yet, something between Debian 6.0.6 and Ubuntu 12.04 also the most common "hiccups" when you install the system

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• Changing video resolution with Handbrake - anamorphic and modulus parameter

  - by MarAja

  I would like to convert a video in 16:9 format (1920*1080) to a 4:3 format (640*480) with Handbrake. Can anyone explain me what are anamorphic and modulus parameters? I tried to set modulus to 2 or 16 on a video but I can't really see the difference between both videos. I would also know if there are different algorithms to change a video resolution and if I am doing it in the right way. Bonus question: What are PAR width and height? They are set by default to 1, should I change them?

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• replace set of integers with respective string values

  - by Tripz

  I have a query which return the output like -- 5,4,6 Where 1 = apple, 2 = mango, 3 = banana, 4 = plum, 5 = cherry, 6 = kiwi etc. I would like to update my output as cherry,plum,kiwi instead of 5,4,6 How can I achieve that in the same select statment. I am okay to hard code the values. Please confirm May be I did explain clearly Here is the sample SELECT fruits FROM t_fruitid where id = 7 is returning me '5,6,4' as a single row Now I want to update this single row output as 'cherry,plum,kiwi' How do I do this Thanku

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• Error from DNS validation service: RFC821 4.3

  - by ferdi

  So I've managed to setup bind9 and a mail server, but it seems there is something wrong. I don't quite under stand this error: The configuration of your mail servers and your DNS are not ok! The report of the test is: mail.domain.com. - mail.domain.com - 208.xxx.xxx.xxx - lisa.domain.com Spam recognition software and RFC821 4.3 (also RFC2821 4.3.1) state that the hostname given in the SMTP greeting MUST have an A record pointing back to the same server. Can anyone explain this to me in a bit more detail, and maybe point me in a direction to solve this?

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• Xmodmap configuration

  - by Krishna S

  On my Debian Linux machine Ctrl+Alt+F1 is bound to a virtual terminal. I can see the corresponding entry by running xmodmap -pke keycode 67 = F1 XF86_Switch_VT_1 F1 XF86_Switch_VT_1 Per this thread, which I might add is consistent with what I've read elsewhere, the columns on the right hand side of = correspond to key, Shift+key, AltGr+key and Shift+AltGr+key. Given that, I don't understand how the keycode mapping for F1 (above) works for Ctrl+Alt+F1. It seems it should really be either Shift+F1 or Shift+AltGr+F1? Here's the output of xmodmap -pm on my machine: shift Shift_L (0x32), Shift_R (0x3e) lock Caps_Lock (0x25) control Control_L (0x42), Control_R (0x69) mod1 Alt_L (0x40), Alt_R (0x6c), Meta_L (0xcd) mod2 Num_Lock (0x4d) mod3 mod4 Super_L (0x85), Super_R (0x86), Super_L (0xce), Hyper_L (0xcf) mod5 ISO_Level3_Shift (0x5c), Mode_switch (0xcb) Can anybody explain it?

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• Adobe Acrobat: How to batch to combine multiple pdf files?

  - by Andrei Andre

  I have 3 folders: Folder 1 Folder 2 Folder 3 In each folder I have 5 pdf files: Folder 1 file1.pdf file2.pdf Folder 2 file1.pdf file2.pdf Folder 3 file1.pdf file2.pdf I want that in each folder to have a combined file of those two files: Folder 1 binder.pdf Folder 2 binder.pdf Folder 3 binder.pdf Any idea? Don't tell to do it manually. This case is just to explain you my problem. Think that I have hundreds of folders. :) Maybe I can use another tool instead of Adobe Acrobat?!

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• Difference between ps output and top output?

  - by Soumya Prasad Ukil

  I find it difficult to understand the output produced by ps and top? This is the output by top: PID PSID USERNAME TID PRI NICE SIZE RES STATE TIME CPU COMMAND 26439 23712 soumyau 26439 15 0 7512M 5234M sleep 286:25 16.67% or_lse2 (18) 26523 23712 soumyau 26439 -2 0 7512M 5234M cpu9 143:10 8.33% or_lse2 26522 23712 soumyau 26439 -2 0 7512M 5234M cpu3 143:10 8.33% or_lse2 This is by ps (ps -L -p 26439 -o pcpu,psr,pid,user,tid): %CPU PSR PID USER TID 99.9 3 26439 soumyau 26522 99.9 9 26439 soumyau 26523 0.0 8 26439 soumyau 26439 Why are there differences in two result? Can you briefly explain the significance of the two CPU% ?

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• How can I VPN into a domain and act as if it is local?

  - by Duall

  I've looked and looked and the internet seems to have finally failed me, there's no information on my specific issue. I have two locations, and one server (sbs 2008); I need them to act like one physical LAN. I know it's possible, I just know how to set it up, or anything about VPNs, etc. So, just to clarify a bit more: 1 Small Business Server 2008 ~30 Computers with varying systems from Windows XP to 7 2 Physical Locations I use redirected folders, but since that would consume a lot of bandwith over VPN, I have a machine over there that can be the workhorse for storage. Users need to access e-mail and shared databases from this server (or possibly some form of DFS with aforementioned workhorse) from the other building. Is there a nice tutorial (or I nice person that wants to write it) online that can explain how to set up computers from an external network to act like they were in the LAN?

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• Black screen during startup

  - by Juanillo

  Hello, I've got a friend with a weird problem. When he starts his computer the screen is completely black untile the computer is completely started. So the screen is black until it suddenly shows the windows desktop. He said that this is happening since a technical service repaired his computer, but that repairment is not now in warranty. Recently the computer stopped working, but as the screen is black he cannot access to Bios or to secure start-up (by pressing F8). When he inserts the Windows Vista DVD the system doesn't boot from DVD (it musn't be configured in this way in the Bios.) Maybe there´s a problem with the hardware (maybe the graphic card). Can anyone explain a reason why the screen is black during start-up? Any idea of what to do with the computer to restore it? Thanks.

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• Virtual system drive is split between separate LUNs

  - by Tigran

  My hardware VMWare guy told me that a Win2008R2 server I have has a D drive that is split between two separate LUNs. He could not tell me if that's a good thing or bad just that it's not standard practice for him. Would you please explain the benefits or drawbacks of this setup? Thanks EDIT Some additional info. What happened was I had D drive already allocated. Then I asked for more. They said there's no more space on whatever LUN my D drive is on so the option they gave me was that part of the D drive will be on one LUN and other part will be on another LUN. Hope that helps

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