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• Ubuntu is unresponsive and scrolling is very jerky

  - by peterpipe

  I'm new to Ubuntu. I've been using 12.04LTS for over a week now. For 3 days it was great but now I'm having a number of problems. I'm using an Acer Aspire one D255 it has a 250GB HDD and a 1GB Memory. My browser is Firefox. Pages freeze occasionally and I wait for over 10 minutes and have to use the computer's 'off' button. Pages crash. On facebook some pictures don't load and I have to close down and restart a couple of times. Scrolling can sometimes be very jerky. Downloading software has become a problem and I have a 'no entry' sign in the top taskbar. I've looked at this page for some help but the words used and the explanations are not helpful to someone like me who has little knowledge of this. Please - 'Ubuntu for dummies'. I'd like to continue using Ubuntu but am close to giving up.

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• Please Help Me Optimize This

  - by Zero

  I'm trying to optimize my .htaccess file to avoid performance issues. In my .htaccess file I have something that looks like this: RewriteEngine on RewriteCond %{HTTP_USER_AGENT} bigbadbot [NC,OR] RewriteCond %{HTTP_USER_AGENT} otherbot1 [NC,OR] RewriteCond %{HTTP_USER_AGENT} otherbot2 [NC] RewriteRule ^.* - [F,L] The first rewrite rule (bigbadbot) handles about 100 requests per second, whereas the other two rewrite rules below it only handle a few requests per hour. My question is, since the first rewrite rule (bigbadbot) handles about 99% of the traffic would it be better to place these rules into two separate rulesets? For example: RewriteEngine on RewriteCond %{HTTP_USER_AGENT} bigbadbot [NC] RewriteRule ^.* - [F,L] RewriteCond %{HTTP_USER_AGENT} otherbot1 [NC,OR] RewriteCond %{HTTP_USER_AGENT} otherbot2 [NC] RewriteRule ^.* - [F,L] Can someone tell me what would be better in terms of performance? Has anyone ever benchmarked this? Thanks!

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• I want to replace 120GB SSD with 240GB SSD. Will I need to reinstall Windows?

  - by Borek

  Some SSD vendors offer "upgrade kits" that are supposed to move the operating system from the old disk to the new one without the need to reinstall it, however, it didn't really quite work for me in the past and I always ended up installing the system from scratch. I'd really like to avoid it now so I'd like to ask: Generally speaking, when upgrading from a smaller to a larger SSD, will something like Windows Complete PC Backup and Restore work? Has someone experienced a seamless upgrade? Is there a proven tool to do that? (That worked for you, not that should work theoretically.) My problem usually is that the restored system sees a different disk, thinks it is a different hardware and doesn't want to restore.

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• What happens internally in a router when LAN is configured? [closed]

  - by vindhya

  This week I was trying to setup LAN to my home. I couldn't login to the router webpage even though I tried all the username and password like admin etc... I want to ask: Why username and password is required to access modem/router webpage because its always usually admin and admin? What exactly happens inside router when you type correct username and password. Does the router store it internally or does it ask some ISP servers about it? Could someone explain what exactly happens internally in the router right from the configuration phase?

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• Changing Chrome Working Directories on Mac clients

  - by Jason

  We're using Mac OSX 10.6.8 with NFS for home directories. Chrome seems to not like this, for a user who is logged in more than one machine. AFP was ok, but for other reasons we need NFS. It only allows you to start one instance. Ie, userA logged in to Mac1, Mac2. Can only have chrome open on Mac1 OR mac2, not both. I have read at this thread, changing working directory, and sym link can fix... but I can't find the details. Can someone help?

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• Win7 not detecting external HDD but Ubuntu is detecting. Why?

  - by unlimit

  I have a 500GB Toshiba external HDD. Since yesterday Windows 7 stopped detecting it, however I do see it listed on the "Safely remove hardware and eject media" icon on the taskbar. Then I tried the same external HDD on my Ubuntu and it detected it just fine. Ubuntu and Windows 7 are on the same laptop. I have dual boot. Can someone tell me why is it happening? Am I missing a driver in Windows 7? Additional info: 1. This drive has worked perfectly fine in the past. 2. I did not format this drive ever. 3. It just stopped working yesterday in windows.

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• If the bug is 5+ years old, then is it a feature?

  - by Job

  Allow me to add details: I work at an institutional place with many coders, testers, QA analysts, product owners, etc. and here is something that bugs me: We have been able to sell crappy (albeit pretty functional) software for over a decade. It has many features and the product is competitive, but there are a some serious bugs out there, as well as thousands of "paper cuts" - little annoyances that clients need to get used to. It pains me to look at some of the things because I firmly believe that if computers do not help to make our lives easier, then we should not use them. I have confidence in my colleagues - they are smart, able, and can improve things when the focus is on doing that. But, it can be difficult to file bugs against some old functionality without seeing them closed or forgotten. "It worked like that for ions" is a typical answer. Also, when QA does regression, they tend to look for anything that is different as much as anything that does not seem right. So, a fix to an old problem can be written up as a bug, because "it has been like that before even my time". The young coder in me thinks: rewrite this freaking thing! As someone who had the opportunity to be close to sales, clients, I want to give a benefit of a doubt to this approach. I am interested in your opinion/experience as well. Please try to consider risk, cost-to-benefit, and other non-technical factors.

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• MS SQL server 2005 replication

  - by hubertus

  Hi. I have a problem with replication between 3 servers. I made something like this: server A replicate (transactional replication) to server B (to 'mydb' database), then server B replicate 'mydb' (using transactional replication) to server C. On the beginning it looks and works fine, but something wrong is going on (about 2-3 month later) and replication break up. SQL say that hi can replicate db because db is allready use to replicate. Any one had similar broblem? Mayby someone knows hot can I make alternative configuration to have similar funcionality?

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• Password format not liked by installer

  - by Box293

  I'm installing Chargeback and I get to the database-related information page (step 5 on page 17 of the users guide). Using a Windows account (it is an administrator of the server and I am logged on as that user) Username: DOMAIN\ServiceVMware-CB Password: #$%UuuU2u (this isn't the password but it does start with #$% and is the same length and case) I click the Test Connected and it returns back OK. I click Next and then I am given a warning telling me that the account does not have the right permissions. Check that it has log on as a service etc etc etc. I quit the installer. I change the password in the domain to Uuuuuu3 I reboot the server I restart the server The installer has no problems with the newer password. I'm not fussed either way, I'm just trying to save someone else the pain and perhaps the allowed password format could be added to the documentation. BTW I am using Server 2008 SP2 x64 with SQL Express 2005 x64.

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• DVI vs HDMI graphics card output

  - by Shack

  Asking on behalf of someone: I want to buy a new graphics card but do not know which would be best in terms of output, DVI or HDMI, the sound part of the HDMI is not really required, I just need something to go to my new 32 inch hd tv. It accepts both DVI and HDMI. I only need it for basic gaming but mostly as a media center to watch movies and tv shows on. Also for windows media center's TV application, I need a tv card, should I get a graphics card with bult in tv card, or a usb dongle??

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• What does the Sys_PageIn() function do in Quake?

  - by Philip

  I've noticed in the initialization process of the original Quake the following function is called. volatile int sys_checksum; // **lots of code** void Sys_PageIn(void *ptr, int size) { byte *x; int j,m,n; //touch all memory to make sure its there. The 16-page skip is to //keep Win 95 from thinking we're trying to page ourselves in (we are //doing that, of course, but there's no reason we shouldn't) x = (byte *)ptr; for (n=0 ; n<4 ; n++) { for (m=0; m<(size - 16 * 0x1000) ; m += 4) { sys_checksum += *(int *)&x[m]; sys_checksum += *(int *)&x[m + 16 * 0x10000]; } } } I think I'm just not familiar enough with paging to understand this function. the void* ptr passed to the function is a recently malloc()'d piece of memory that is size bytes big. This is the whole function - j is an unreferenced variable. My best guess is that the volatile int sys_checksum is forcing the system to physically read all of the space that was just malloc()'d, perhaps to ensure that these spaces exist in virtual memory? Is this right? And why would someone do this? Is it for some antiquated Win95 reason?

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• Laptop HDD not mounting.

  - by D3X

  I have a laptop with broken (shorted out) motherboard and a 640 GB HDD. I want to recover my data from the hard disk. Every time I connect the hard disk using an external casing, it is being detected in the disk management service but not visible in my computer, nor accessible through command prompt. The Hard Disk is functioning as I can feel the hard disk rotor working properly when connected using the casing. Also the LED on the hard disk is blinking, the data is there but i am unable to access the data. Someone please suggest me ways of using the hard-disk as a slave disk using casing.

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• In facebook pictures bdon't always load properly and scrolling is very jerky

  - by peterpipe

  I'm new to Ubuntu. I've been using 12.04LTS for over a week now. For 3 days it was great but now I'm having a number of problems. I'm using an Acer Aspire one D255 it has a 250GB HDD and a 1GB Memory. My browser is Firefox. Pages freeze occasionally and I wait for over 10 minutes and have to use the computer's 'off' button. Pages crash. On facebook some pictures don't load and I have to close down and restart a couple of times. Scrolling can sometimes be very jerky. Downloading software has become a problem and I have a 'no entry' sign in the top taskbar. I've looked at this page for some help but the words used and the explanations are not helpful to someone like me who has little knowledge of this. Please - 'Ubuntu for dummies'. I'd like to continue using Ubuntu but am close to giving up.

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• Network configuration for several LANs and a shared server

  - by Grodriguez

  I want to setup a network on a building to provide shared services to all homes within the building. This should work as follows: Each home has a private LAN (e.g. 192.168.0.x) and an ADSL router for Internet access. Private LANs from each home should not "see" each other. There will be a shared server on the building which must be accessible from every home. I am not sure what is the best way to achieve this. Can someone point in the right direction? Thanks.

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• Debian - no sound output

  - by Gogeta70

  So I've been trying for the last few days to get sound output on my Linux desktop. The onboard audio is Intel HD Audio ICH9, but I couldn't get Alsa to even detect it, so I disabled it in BIOS and installed a PCI card - a Dynex DX-SC51. Searching around, I found that it needed the Alsa driver for ice1724, so I installed all the stuff for that. Now, the system detects my sound card, but I can't get any audio to play out of it. Here's some information: root@debian:~# lspci | grep audio 02:01.0 Multimedia audio controller: VIA Technologies Inc. VT1720/24 [Envy24PT/HT] PCI Multi-Channel Audio Controller (rev 01) root@debian:~# aplay -l **** List of PLAYBACK Hardware Devices **** card 0: ICE1724 [ICEnsemble ICE1724], device 0: ICE1724 [ICE1724] Subdevices: 0/1 Subdevice #0: subdevice #0 card 0: ICE1724 [ICEnsemble ICE1724], device 1: ICE1724 IEC958 [ICE1724 IEC958] Subdevices: 1/1 Subdevice #0: subdevice #0 I've been trying various solutions found on Google for a few days now and I'm getting nowhere. Hopefully someone here can point me in the right direction. Thanks.

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• Server seems up, but accepts no connections whatsoever

  - by Rnatau

  Hi, I have a problem with a Debian based Server, unfortunately housed in a remote location. Two days ago, it was suddenly down and completely unreachable. After having someone reboot it, it worked for about a day, then seemed to be down again. This time, however, it was different: -The server reacts to pings -It is scannable, and all the relevant ports are open But: -Open shells were immediately blocked, and no warning had been shown -It's not possible to open any connection - the TCP/IP handshake seems to have some problems: SSH handshake As this is a private server of a small community, we don't have the resources to pay a technician to fix the problem for us, so any hints how to fix the problem after the next reboot would be highly appreciated... Thanks a lot!

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• What is the fastest way for me to become a full stack developer? [on hold]

  - by user136368

  I run a small webdesign firm. I have an overview of HTML, CSS, JS, PHP(laravel), MySQL. I did a few courses on code academy. I wanted to build a web app in the company. I find that I am severely crippled by the lack of programming expertise. I want to become a full stack developer who can build a prototype on his own. I cannot spend 5-10k USD on the boot camp courses. Can someone suggest structured courses which can help me become a full stack developers? I found the following websites but I donot know if they can help me become one. My goal: Be able to make a working prototype of the ideas I come up with.(This is my primary goal. I do not want to be the lead developer. I just want to be able to make a prototype.) Several questions I have in mind: Will it be fine if I stick to PHP(laravel)? Should I be using ROR? I have come across a few online resources: Codeacademy, codeschool,teamtreehouse,and theodinproject. These are within my affordability range. I can commit to a 2-3 months intensively to learn programming. What do you suggest I do?

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• How does Google manage to serve results so fast?

  - by Quintin Par

  I am building an autocomplete functionality for my site and the Google instant results are my benchmark. When I look at Google, the 50-60 ms response time baffle me. They look insane. In comparison here’s how mine looks like. To give you an idea my results are cached on the load balancer and served from a machine that has httpd slowstart and initcwnd fixed. My site is also behind cloudflare From a server side perspective I don’t think I can do anything more. Can someone help me take this 500 ms response time to 60ms? What more should I be doing to achieve Google level performance?

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• Block unknown callers at work, but let them through if they try again [migrated]

  - by Blazemore

  I have Tasker for Android but I don't know enough about it to be able to implement this. I'd like this to occur when I am connected to a specific wireless network: If someone phones who isn't in my contact list, reject the call immediately (straight to voicemail). If they call again within a certain amount of time (say, 30 seconds) allow the call to come through. Frankly, I can't even get the first one working. I know it's possible. The time thing is a kind of added bonus

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• Windows 7 not detecting external hard drive but Ubuntu is detecting. Why?

  - by unlimit

  I have a 500 GB Toshiba external hard drive. Since yesterday Windows 7 stopped detecting it, however I do see it listed on the "Safely remove hardware and eject media" icon on the taskbar. Then I tried the same external hard drive on my Ubuntu and it detected it just fine. Ubuntu and Windows 7 are on the same laptop. I have dual boot. Can someone tell me why is it happening? Am I missing a driver in Windows 7? Additional info: This drive has worked perfectly fine in the past. I did not format this drive ever. It just stopped working yesterday in windows.

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• iptable rules not blocking

  - by psychok7

  so i am trying to allow ssh access to a certain range of ips (from 192.168.1.1 to 192.168.1.24) and block all the rest but since i am new to iptables i can't seem to figure, i have : iptables -A INPUT -s 192.168.1.0/24 -p udp --dport ssh -j ACCEPT iptables -A INPUT -s 192.168.1.0/24 -p tcp --dport ssh -j ACCEPT iptables -A INPUT -p tcp --dport ssh -j REJECT iptables -A INPUT -p udp --dport ssh -j REJECT but this does not work, with a vm set with 192.168.1.89 i can still access through ssh. can someone help?

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• Windows 7,find who accessed my computer on network?

  - by pg2012

  It seems something tried to delete root c:/ folders on my computer and it did started delete process alphabetical order. Not sure what is cause. any known virus? We have company network edition of antivirus running, and full scan did not found any virus activity. That makes me suspious about someone on company network attempt to delete? can this possible? If it is how do we know from windows server that who accessed my computer over network?

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• Two way replication

  - by Nidzaaaa

  I have a little problem... I have this case: -2 server instances -2 Databases -1 Table (5 columns) From server 1 I created publication to replicate all columns of table I have in 1. DB From server 2 I created subscription to pull all columns from table which is in server 1 DB But now, I need to publicate one columns of same table from server 2 to server 1 and also it has to be in same DB... I tried with using logic and creating publication for server 2 and subscription on server 1 but there is error appearing "You have selected the Publisher as a Subscriber and entered a subscription database that is the same as the publishing database. Select another subscription database." I hope someone understood my problem and have an answer for me, thanks in advance... p.s. Ask for more info if you need ...

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• What factors should be taken into consideration before buying a computer Moniter (display/screen)?

  - by coding crow

  I work on computer for most of waking day and have been using a 13.3" laptop. I was planning to buy a good monitor/screen/display for sometime now but was lazy. Now I have developed Computer Vision Syndrome and buying a monitor has become immediate priority. I have spend some time on net and trying to understand what should I buy and why? I could only zero down on the size (20") and LED and looking for advice on many other factors like resolution, pixel density, panel technology and so forth. It will be great help if someone experienced can show shed some light on computer monitor best for the programmers spending 8 to 10 hours in front of the screen.

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• Alow Plesk access (login) only for one domain

  - by crimson93

  Hope someone is able to help me. :) I have 4 domains registered, and all of them are using the same server. That means, they have the same IP-Address. Thats okay, but at the moment it is possible to access the plesk using ":8443" with all domains. But I would like to permit access to plesk only for 1 domain! That means, if enter: "https:// domainexample1:8443" it should allow the access to plesk. If I enter: "https:// domainexample2:8443" it should forbid. How can I configure this, or change the settings? Thanks in advance! :) Best regards

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