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• IE 9 home page is hijacked by avg

  - by horace

  I definitely know how to change the home page in Internet Explorer (Tools -> Options -> General). The problem is, no matter what I put there, it never changes. Stop/restart Internet Explorer and the old home page is back. I did some research to see if there is a registry key that I could tweak to get the home page to set properly. I changed the start page registry key and refreshed the view and the start page key (without even restarting regedit) was reset back to its original value. Now I'm a little concerned. Maybe there's some virus I can't detect on my system? Internet Explorer 9.0.8112.16421 Windows 7 Pro SP 1 x64

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• Can Excel show a formula and its result simultaneously?

  - by nhinkle

  I know that it's possible in Excel to toggle between displaying values and displaying formulas. I'm required to turn in assignments for a statistics class as a printed Excel sheet showing both the formula and the result. Right now the instructor makes us either copy the formula and paste it as text next to the computed value, or copy the value and paste it next to the formula. This is very inefficient, prone to error (if you change the formula or values after doing the copy-paste), and generally a waste of time. Is there any way to have Excel show the formula and its value in the same cell? If not, is there any function which will display the formula from a referenced cell as plain text, e.g. =showformula(A1) which would print out =sum(A2:A5) instead of 25 (if those were the formula and value of cell A1)? I'm using Excel 2010, but a general answer that works for any recent edition of Excel would be nice.

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• Just how slow should my VPN be?

  - by David Heggie

  I have a VPN setup between a remote office with 2 ADSL connections (8Mb downstream, 512Kb upstream) and a main office with a 10Mb EFM connection (10Mb both up and down). The VPN is an IPSec connection using a DrayTek 2930 router for the ADSL and a DrayTek 3200 router at the EFM end. However, I'm unable to get speeds over this connection (tested with iperf) of anything over 600Kb or so down from the main office (traffic will pretty much always be from the main office to the remote office) Whilst I realise that there is an overhead and I'm never going to get the "full" bandwidth available over this VPN, I'd like to think that there's something I should be looking at that may help improve it. I've tried using the DrayTek's built-in "VPN Trunking" features which are supposed to load-balance connections, but this doesn't seem to improve matters much. I guess my question is - is this the kind of performance I should expect from this kind of setup and I'll just have to live with it, or should I be able to squeeze something more out of it through some VPN magic?

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• Distribute Nagios to reduce false alarms

  - by GDR

  I'm currently running a single Nagios instance. From time to time, I'm getting false alarms about timeouts - for example, it says that HTTP is down on some server, but when I open it in my browser several seconds later, it loads fast, and in general there is no trace of an error. What can I do to reduce such false alarms? I'm guessing that it's because of transient network issues on my monitoring server. I guess that setting up another monitoring server on a different network would greatly help, but how do I plug it into Nagios? Is it at all possible with Nagios or do I have to switch to another monitoring system? I like my configs and, if possible, I'd like to stay with Nagios or something compatible (Icinga?)

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• Hide Win 8.1 "tip" about "Switch between apps"?

  - by Carl R

  I've just installed Win8.1 and I'm trying to set up IIS. When I open Add remove programs from the start menu I get the pc-settings app. In the pc-settings app I get a "tooltip" or whatever we should call it, that hints me to "Switch between apps" by swiping from the edge. Well fine, but I don't want to do that right now, and I can't get that tip to dissapear. The tip lingers on even into Visual Studio, covering my code. I can't swipe because I don't have a touch screen, and also I'm on a multimonitor system that shows this tip in the middle of the screen. Here's a screenshot for you, where I put the web browser slightly over the left monitor. So, besides rebooting, how am I supposed to kill this very informative tip? EDIT When I kill the app by alt-f4 it dissapears right until I open the settings app again, then it's back. What I'm asking about is how to dismiss items like this in general.

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• Do I need more RAM for programming if I switch to a 64 Bit OS?

  - by Buttercup

  Hi, Given that today (for performance reasons?) variables are usually aligned to the "bit-width" (I wanted to use "word-width" here, but on x86 a "word" is still 16 bits right?) of the processor, would switching from a 32 bit OS to its 64 bit version double the RAM usage? Would this then in turn mean that to do the same work a 32 bit OS can do with 4 GB RAM (well, the 3.x GB actually...) with a 64 bit OS I would need 8 GB of RAM for programming? Please note that I'm only talking about everyday x86 computers here.

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• "save the changes" message after removing the protection from workbook Excel 2010

  - by abbasi

  Some time ago I protected the Excel 2010 file from the path File Protect workbook Encrypt with password and gave it a password. Now that I removed that password via below method: Open the workbook and use Save As In the lower right of the file window will be "Tools" Choose "General Options" Clear the password. Save over your old file. the file is openable without wanting a password. But the problem is when I open it and close it immediately, even without moving the active cell, the message "Do you want to save the changes you made to 'test.lsx'?" appears. While there hasn't occurred any changes to that file so why I face this message any time I want to close the file? Hasn't the file been corrupted?

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• log execution of certain commands on linux

  - by jlsksr

  I have to maintain a system (debian) on which several users are allowed to install programs - so I would like to log, for example, if anyone executes "apt-get install" or "apt-get purge", so I can keep track of manually installed packages.. I'm looking for a general way to achieve this; it's not just APT, but several programs/scripts etc. Any ideas? /edit a google-search with few different keywords brought up this: http://serverfault.com/questions/201221/how-to-log-every-linux-command-to-a-logserver http://stackoverflow.com/questions/15698590/how-to-capture-all-the-commands-typed-in-unix-linux-by-any-user http://sourceforge.net/projects/rootsh/

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• Installing VirtIO drivers in Windows Server 2008

  - by Stefan K.

  We are running a Windows Server 2008 system as a "guest" on a Linux-KVM virtual server (SLES11, with VirtIO support). We have trouble with the system performance and this is possibly due to not using the VirtIO drivers. I don't have much experience with neither KVM not VirtIO. Just heard it this could be the reason for our problem. Questions: The install examples I just found are describing how to install the drivers during Windows setup. Is it possible to install the VirtIO drivers later? We have running software on that system and would like to avoid reinstalling/setup of all these. I already found a page describing how to sign the drivers, which seems to be needed. A good tutorial page (step by step instructions) would be nice. Is there anything like that out there?

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• How do you handle the task of changing the schema of a production MySQL database?

  - by Continuation

  One of the biggest complaints I have heard about MySQL is that it locks up a table if you try to change its schema like adding a column or adding an index. By "locking up the table" does it mean I can neither read nor write to the table? Sometimes for hours? That seems a pretty severe limitations. I was going to use MySQL for my new project but this gives me pause. Is there a workaround for this? How do you handle the task of changing the schema of your production MySQL database? By the way someone told me Postgresql doesn't have this problem. Is that true - I can both read and write to a Postgresql table while changing its schema? Is there any performance penalty incurred? Would love to hear your experiences.

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• Excel 2010 started changing my numbers

  - by Going Crazy

  If I type in a 16 digit number (format: number, no decimals) it changes the number on me. Example: 1234567812345678 changes the view to 1234567812345670. If I type it in as a general format it changes the numbers above so it displays 1.23457E+15 but if you click on the cell, the display shows the last digit as a 0 instead of an 8 once again. I opened the file on a different computer and same issue now with it. I have changed the auto correcting and auto formating all to no avail. Help!

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• Windows 7 Natively on Mac OS X Bootcamp, Airport Wifi Unable To Connect

  - by Goober

  I am using a brand new MacBook Pro. I am running a copy of Windows 7 natively via bootcamp (No use of Virtual Machine Software at all). However the only way I can get Windows to connect to the internet is via ethernet, as opposed to the Macs Airport card picking up the wireless. It just refuses to connect, and gives me a limited access status. Any ideas!? I've run Windows XP natively via bootcamp and I had a few issues with the network constantly dropping out, however I blamed that on the drivers and the general shiteness of XP.... Help greatly appreciated.

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• ISA bus on newer computers

  - by Kevin Ivarsen

  Are there companies that sell new computers that support old ISA bus expansion cards? We have an aging computer running DOS that operates some machinery via an ISA interface board. Updated versions of this board (e.g. PCI, USB) are not available, and I am concerned about the long-term reliability of the 8+ year old computers we currently keep around as backups. If these newer ISA-capable machines exist, are there any general gotchas to be aware of in terms of compatibility with older expansion boards, ability to run DOS, etc.?

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• Lots of artifacts while streaming HD content with VLC 0.9.9 on CentOS

  - by Zsub

  I'm trying to stream (multicast) a x264 encoded file using VLC. This in itself succeeds, but the stream has a huge lot of artifacts. This seems to suggest that the data cannot be transported fast enough. If I check network usage, though, it's only using about 15 mbit. I have a similar SD stream which functions perfectly. I think I could improve stream performance by not streaming the raw data, but I cannot seem to get this working. It seems that on keyframes all artifacts are removed for a short while (less than a second). This is the command I use: vlc -vv hdtest.mkv --sout '#duplicate{dst=rtp{dst=ff02::1%eth1,mux=ts,port=5678,sap,group="Testgroup",name="TeststreamHD"}}' --loop Which is all one long line.

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• I'll be setting up a dedicated web server at work soon, my first non hobby server - What should I know?

  - by Rogue Coder

  I've been running my own dedicated server running CentOS and a LAMP stack for 2-3 years now, but it's only been hosting my own websites which aren't super important. However, I will soon be setting up a Linux Webserver and Linux Database Server at work, and I'm wondering what are some important things I should be doing. It's an internal server only, so only people in the company can access it. Should I get a slave server for both of my servers for backups? If I do this, how many backups should I be keeping and how often should those backups be done? Right now on my current server I run a cron job nightly to backup my MySQL databases (Usually 40mb files once compressed), and bi-weekly cron jobs to backup my web root. I just store these files on my local computer via FTP. Also, for an internal server like this, should I look at using LightHTTPD or NginX to increase performance, or will Apache be fine?

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• Problem with screen redrawing at DOS app in VmWare Player

  - by MicTech

  I have very old DOS Application (CadSoft Eagle - PCB Designer) and I want to work with it on my workstation with Windows 7. Then I install Windows 98 and that software into VmWare Player. But that software has serious problem with redrawing screen. It's very slow in comparison with my Intel Celeron 333MHz with Windows 98. I have same problem if I try to use DOSBox. I also trying run this application directly on Windows XP with compatibility mod set to "Windows 98", but I get "(0Dh): General Protection Fault". Can someone give me good advice how I solve that?

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• Linux RAID0 - relocating member disk

  - by qdot

  I've got an issue I would rather handle with the array online - I am using RAID0 for temporary video storage - data that is low-cost to restore, but that is used frequently. The software array looks like this: md1 : active raid0 sdb1[2] sdc1[3] sdd1[0] sde1[1] 1953487616 blocks 64k chunks I have another partition (sda1) in this system, that I want to use to replace sdc1 (The drives are of varying age, and sdc1 is definitely the slowest one, limiting the entire array's sequential read performance to only 300MB/s). Is there a way to migrate the data from sdc1 to sda1 while the array is still online?

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• Private Git repo using Smart HTTP with LDAP authentification

  - by ALOToverflow

  I've been crawling the interwebz and getting my hands dirty for the last few days, but I can't seem to make it all work together. I managed to get a HTTP repo working with Ubuntu 10.04 over Smart HTTP (pull and push over HTTP) for a single repo. This means that I do the initial setup over SSH to the server (git init --bare) and after that the clients can pull and push to it (git clone http://servername/allgitrepos/repo.git). Unfortunately it's impossible to add a new repo without SSHing to the server and adding it manually) i.e. git push http://servername/allgitrepos/repo2.git (allgitrepos is available for everyone to read-write and execute) would fail talking about git update-server-info (which seems to be a general error message). So far the repository is anonymous, so I would like to authenticate using LDAP and also use the LDAP creds to make the git commit. So, how can I push new repos to the server and how can I use the LDAP creds to make the git commit. Thanks

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• Pages partially load on rapid refresh

  - by user101570

  I recently set up a VPS slice with 256MB to run a LAMP stack (Ubuntu 11.04, Apache2, Mysql, PHP5). So far I'm only running a simple Wordpress site on an IP-based virtual host I set up. The performance is excellent, but I've noticed that if I send multiple HTTP requests from the same IP in a short time period, only partial pages are rendered. Then if I wait a bit and refresh the page, the entire page loads again. I noticed this behaviour when accessing the site from two browsers from my office desktop, but it also presents itself if I quickly navigate the site from a single browser (any browser). I'm guessing this is an Apache phenomenon, as the pages are rendered correctly except under the conditions above, but perhaps I'm wrong here. Could it be my hosting company with some kind of DOS protection in place? As a relative Linux/server noob, I'd really appreciate any insight into what settings in Apache could explain this behaviour, and how I might go about changing it.

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• Unix printing a banner page on every print job

  - by yum_tacos4u

  I have a Data General server on unix that is printing a banner page on every print. I originally thought that the banner page was comming from the printer. As this is an HP printer, I used telnet to get to the jetadmin and then proceded to disable the banner page, but this did not solve the issue. I then went into the sysadm program to see if the TCPIP printing was set to print a banner page on print jobs, but I did not see any options to print a banner page. Any help or ideas on how to disable the banner page from printing in unix? Here is a banner page example print

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• XDMCP is slow any ideas? (looking for alternative remote desktops)

  - by peteri

  I've been used to using RDP on Windows to remote to machines, and I've got an asus eee 701 which I want to use to do some *nix programming on. While the eee is a lovely little machine the screen and keyboard are a little small to use for lots of programming. I've tried using Xming (the free version) to remote login into the eee from my desktop using XDMCP (or even using a ssh session as a straight X11 server and no desktop on the eee) the whole thing seems seriously slow over wifi the initial desktop takes at least 5 seconds to paint (might even be 10 seconds I haven't actually timed it). So my real question is what do other folks use for remote control with a GUI for their *nix boxes? I am finding it hard to believe the performance is so bad over a wifi network (It makes the Mac IIs I used to use a college in 1988 seem fast) or is this just a problem with Xming and using say the Cygwin X11 server would be better.

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• Motherboard: Intel S5520HCR s1366 SSI EEB

  - by Crazy_Bash

  I'm building a storage server for online video streaming. I thought about adding two SSD drive for a OS. other 15*(12 SATA & 3 SSD) drives i want to build with aufs XFS and ethernet 4GB/sec network. But I'm confused a little. S5520HCR board supports 6, SATA/300, RAID: 0, 1, 10, Intel ICH10R. Does it mean i can use SATAIII HDD? I'm planing on buying SEAGATE SV35 Series (3.5, 3??, 64??, SATA III-600). also my Chassis supports up-to 16 sata and the motherboard only 6 what kind of sata controller should i use? What's better in terms of performance 1366 or 2011 socket? My server so far: AIC RSC-3EG-80R-SA1S-2 3U Motherboard: Intel S5520HCR s1366 SSI EEB Kingston DDR3 8192Mb PC3-10600 1333MHz (KVR1333D3N9/8G) Seagate 3000GB 64MB 3.5" 7200rpm SATAIII (ST3000DM001) Kingston 480GB SSD 2.5" SATAIII Intel E1G44HTBLK Intel Xeon E5606 2133MHz/L3-8192Kb/QPI s1366 tray SERVER ACC CARD SAS PCIE 16P HBA 9201-16I LSI00244 SGL LSI

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• Which modules can be disabled in apache2.4 on windows

  - by j0h

  I have an Apache 2.4 webserver running on Windows. I am looking into system hardening and the config file httpd.conf. There are numerous load modules and I am wondering which modules I can safely disable for performance and / or security improvements. Some examples of things I would think I can disable are: LoadModule cgi_module others like LoadModule rewrite_module LoadModule version_module LoadModule proxy_module LoadModule setenvif_module I am not so sure they can be disabled. I am running php5 as a scripting engine, with no databases, and that is it. My loaded modules are: core mod_win32 mpm_winnt http_core mod_so mod_access_compat mod_actions mod_alias mod_allowmethods mod_asis mod_auth_basic mod_authn_core mod_authn_file mod_authz_core mod_authz_groupfile mod_authz_host mod_authz_user mod_autoindex mod_dav_lock mod_dir mod_env mod_headers mod_include mod_info mod_isapi mod_log_config mod_cache_disk mod_mime mod_negotiation mod_proxy mod_proxy_ajp mod_rewrite mod_setenvif mod_socache_shmcb mod_ssl mod_status mod_version mod_php5

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• How to get the spec of a machine on Linux?

  - by machinePurchaser

  I am interested in getting the spec of a machine, because I am thinking getting a similar server. What I am mostly interested in knowing is the number of cores / CPUs / etc., the amount of memory, the speed of the CPUs, the CPU cache size, and any other detail which is important for performance. My question is two-fold: Which parameters should I be interested in other than the ones I specified above? Is there an easy way to read them off the machine in Linux? cat /proc/cpuinfo reveals a lot about the CPUs, for example... What about memory (would rather not rely on top), etc?

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• Running OpenVZ virtual servers within a Xen XCP vritual server? Bad practice?

  - by Damainman

  I have a 1 server with 8GB RAM and 2xQuadcore Processors. It currently has the Xen XCP installed on it, and centos6.2 x64 running on a virtual machine. I have a server control panel software that I want to use and it allows the administration via a web interface for Openvz machines. My questions are: Would this be considered bad practice? Would there be a big performance hit? Should I avoid this all together or am I going about it all wrong? Thank you in advance.

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