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• CentOS 6.5 new Kernel not active after reboot

  - by Kristofer

  Today I was running some yum updates and wanted to verify that everything went through fine by making sure I had a new kernel. To my surprise I noticed that CentOS was still running 2.6.32-431.5.1.el6.x86_64 even though it looked as though 2.6.32-431.23.3.el6 was installed. Indeed 2.6.32-431.23.3.el6 shows up in /etc/grub.conf but not in the upstart boot options. Any ideas why? In the update log it says: ---> Package kernel-firmware.noarch 0:2.6.32-431.5.1.el6 will be updated ---> Package kernel-firmware.noarch 0:2.6.32-431.23.3.el6 will be an update Could this be the reason? What does "will be an update" mean? My /etc/grub.conf: # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE: You have a /boot partition. This means that # all kernel and initrd paths are relative to /boot/, eg. # root (hd0,0) # kernel /vmlinuz-version ro root=/dev/mapper/VolGroup00-root # initrd /initrd-[generic-]version.img #boot=/dev/vda default=0 timeout=5 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu password --encrypted $1$auui(i$sODM4ni/Zts9IlMWu.wWF/ title CentOS (2.6.32-431.23.3.el6.x86_64) root (hd0,0) kernel /vmlinuz-2.6.32-431.23.3.el6.x86_64 ro root=/dev/mapper/VolGroup00-root rd_NO_LUKS LANG=en_US.UTF-8 KEYBOARDTYPE=pc KEYTABLE=sv-latin1 rd_NO_MD rd_LVM_LV=VolGroup00/swap SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_LVM_LV=VolGroup00/root rd_NO_DM rhgb quiet rhgb quiet audit=1 initrd /initramfs-2.6.32-431.23.3.el6.x86_64.img title CentOS (2.6.32-431.5.1.el6.x86_64) root (hd0,0) kernel /vmlinuz-2.6.32-431.5.1.el6.x86_64 ro root=/dev/mapper/VolGroup00-root rd_NO_LUKS LANG=en_US.UTF-8 KEYBOARDTYPE=pc KEYTABLE=sv-latin1 rd_NO_MD rd_LVM_LV=VolGroup00/swap SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_LVM_LV=VolGroup00/root rd_NO_DM rhgb quiet rhgb quiet audit=1 initrd /initramfs-2.6.32-431.5.1.el6.x86_64.img title CentOS (2.6.32-431.el6.x86_64) root (hd0,0) kernel /vmlinuz-2.6.32-431.el6.x86_64 ro root=/dev/mapper/VolGroup00-root rd_NO_LUKS LANG=en_US.UTF-8 KEYBOARDTYPE=pc KEYTABLE=sv-latin1 rd_NO_MD rd_LVM_LV=VolGroup00/swap SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_LVM_LV=VolGroup00/root rd_NO_DM rhgb quiet rhgb quiet audit=1 initrd /initramfs-2.6.32-431.el6.x86_64.img

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• Apache 2.4 with PHP-FPM

  - by tubaguy50035

  I'm trying to setup Apache 2.4 with PHP-FPM 5.4 using the new modules with Apache 2.4. The following is what I have currently in my virtual host file: <VirtualHost *:80> ServerAdmin root@localhost DocumentRoot /var/www #Directory permissions <Directory /var/www/> Options Indexes FollowSymLinks MultiViews AllowOverride None Require all granted </Directory> CustomLog ${APACHE_LOG_DIR}/access.log combined </VirtualHost> I have PHP-FPM running using Unix sockets with a sock file located at /var/run/php5-fpm.sock. How do I proxy my requests to this sock file? I've seen some sites say to use ProxyPassMatch and others are saying Rewrite Rule. Are there pros or cons on either side? Also, most sites I'm seeing are showing ProxyPassMatch with a regex to only pass .php files. Could I also send it .html files? For whatever reason, we have a ton of PHP inside .html files. Edit: As noted in the comments, it looks like mod_proxy_fcgi doesn't support Unix sockets. Is there another module I should be using?

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• Package pinning in Debian lenny

  - by bronto

  I need your advice as I don't know if I hit a bug, or I am misunderstanding something. On a Debian Lenny, I am trying to prevent the installation of two particular packages, when they are requested as dependencies fromother packages. I am using the same syntax I successfully used in Squeeze, but with no success at all. On squeeze, the following works as expected: # cat /etc/apt/preferences.d/local-no-pike.pref Package: pike7.6-core Pin: version * Pin-Priority: -1000 If I try to install pike7.6, which depends on pike7.6-core, apt and aptitude refuse to do so. On Lenny, the only difference is that there is no support for "fragments" in /etc/apt/preferences.d, and all preferences must be in the /etc/apt/preferences file. But it's not working. E.g., if the file contains: Package: grub-common Pin: version * Pin-Priority: -1000 apt doesn't stop me from installing grub, which depends on grub-common. I used strace to see if the file is being read, and it is. I was suggested to use some Debug:: options, but they didn't help to pinpoint the problem either. I have google'd a lot with some combinations of "lenny" "prevent" "package" "installation" "pinning" and the like, but nothing nice came out. And of course I read man apt_preferences. What am I missing here?

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• no A record show in the answer section in dig results

  - by eric low

  To check the record for the domain, run dig with domain name as the parameter. dig example.com any I get the below result. Why there is no A record show in the result. What did i do wrong during the setup. Please advice what suppose to look into it. Hope everyone can help me to resolve the case asap. ; <<>> DiG 9.9.3-P2 <<>> example.com any ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44674 ;; flags: qr rd ra; QUERY: 1, ANSWER: 8, AUTHORITY: 4, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;example.com. IN ANY ;; ANSWER SECTION: example.com. 3489 IN MX 100 biz.mail.com. example.com. 3482 IN NS ns1.domain.com. example.com. 3482 IN NS ns2.domain.com. ;; AUTHORITY SECTION: example.com. 3482 IN NS ns2.domain.com. example.com. 3482 IN NS ns1.domain.com. ;; Query time: 0 msec ;; SERVER: xxx.252.xxx.xxx#53(xxx.252.xxx.xxx) ;; WHEN: Wed Oct 30 04:48:34 CDT 2013 ;; MSG SIZE rcvd: 349

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• Compressing and copying large files on Windows Server?

  - by Aaron

  I've been having a hard time copying large database backups from the database server to a test box at another site. I'm open to any ideas that would help me get this database moved without having to resort to a USB hard drive and the mail. The database server is running Windows Server 2003 R2 Enterprise, 16 GB of RAM and two quad-core 3.0 GHz Xeon X5450s. Files are SQL Server 2005 backup files between 100 GB and 250 GB. The pipe is not the fastest and SQL Server backup files typically compress down to 10-40% of the original, so it made sense to me to compress the files first. I've tried a number of methods, including: gzip 1.2.4 (UnxUtils) and 1.3.12 (GnuWin) bzip2 1.0.1 (UnxUtils) and 1.0.5 (Cygwin) WinRAR 3.90 7-Zip 4.65 (7za.exe) I've attempted to use WinRAR and 7-Zip options for splitting into multiple segments. 7za.exe has worked well for me for database backups on another server, which has ~50 GB backups. I've also tried splitting the .BAK file first with various utilities and compressing the resulting segments. No joy with that approach either- no matter the tool I've tried, it ends up butting against the size of the file. Especially frustrating is that I've transferred files of similar size on Unix boxes without problems using rsync+ssh. Installing an SSH server is not an option for the situation I'm in, unfortunately. For example, this is how 7-Zip dies: H:\dbatmp>7za.exe a -t7z -v250m -mx3 h:\dbatmp\zip\db-20100419_1228.7z h:\dbatmp\db-20100419_1228.bak 7-Zip (A) 4.65 Copyright (c) 1999-2009 Igor Pavlov 2009-02-03 Scanning Creating archive h:\dbatmp\zip\db-20100419_1228.7z Compressing db-20100419_1228.bak System error: Unspecified error

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• The best way to hide data Encryption,Connection,Hardware

  - by Tico Raaphorst

  So to say, if i have a VPS which i own now, and i wanted to make the most secure and stable system that i can make. How would i do that? Just to try: I installed debian 7 with LVM Encryption via installation: You get the 2 partitions a /boot and a encrypted partition. When booting you will be prompted to fill in the password to unlock the encryption of the encrypted partition, Which then will have more partitions like /home /usr and swapspace which will automatically mount. Now, i do need to fill in the password over a VNC-SSL connection via the control panel website of the VPS hoster, so they can see my disk encryption password if they wanted to, they have the option if they wanted to look at what i have as data right? Data encryption on VPS , Is it possible to have a 100% secure virtual private server? So lets say i have my server and it is sitting well locked next to me, with the following examples covered bios (you have to replace bios) raid (you have to unlock raid-config) disk (you have to unlock disk encryption) filelike-zip-tar (files are stored in encrypted archives) which are in some other crypted file mounted as partition (archives mounted as partitions) all on the same system So it will be slow but it would be extremely difficult to crack the encryption. So to say if you stole the server. Then i only need to make the connection like ssh safer with single use passwords, block all incoming and outgoing connections but give one "exception" for myself. And maybe one for if i somehow lose my identity for the "exeption" What other overkill but realistic security options are available, i have heard about SElinux?

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• Synchronising a remote folder with a local one.

  - by Workshop Alex

  I am using a network disk (that's connected to my router by USB) to store several data files. A simple .NET application that I've created is supposed to read and modify these data files. However, some security issues are preventing this application to access these files directly. (Actually, these have been built-in to my application on purpose since it's not going to support NAS disks.) Since this disk is shared with several computers, I just want to have a simple synchronisation method, which will copy the files to a local folder where3 my application can access them. And, once modified, it should send back the modified files to the NAS disk again. I have two options: 1) Build a second application to do my own synchronisation. 2) Find some build-in function inside Windows 7 Ultimate which can do this for me. Option 2 is preferred. Option 1 is something I can do easily, if need be. I don't need third-party tools. (Still, feel free to add some references to good tools, although I won't accept them as answers.) Basically, is this possible with Windows 7 and if so, how?

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• datawind ubislate 9ci tablet computer hanging on boot

  - by user57924

  I am new to this forum. I purchased a new tablet Datawind Ubislate 9ci. It is a 9 inch no-bluetooth tablet. Details: Android 4.1.1 Rock chip RK2928 KERNEL linux version 3.0.36 I was trying to install CWM through mobile odin and ROM manager but my tablet was not supported so i downloaded build.prop editor from google play and changed it to some other cwm recognizable model viz. Samsung, nexus etc. When i was doing the above mentioned procedure, suddenly my tablet is coming up to bootloading and hanging there only and not opening i went to recovery and tried to do wipe data factory reset but failed to get opened after boot android system recovery(3e) has the following options 1)reboot system now 2)apply update from ADB 3)apply update from external storage 4)update rkimage from external storage 6)wipe data factory reset 7)wipe cache partition 8)recovery system from back up i tried to do wipe data factory reset 2-3 times but still hanging at boot i had not made any back up before this bootloop and also tried hard reset by pressing needle at the back please somebody help me to get rid of this problem and also tell me how to unlock bootloader thank you

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• Configuring a MySQL 5.1 Instance on Windows 7 Professional x64 Fails

  - by Thomas Owens

  I'm trying to set up my laptops to function as mobile development environments. Installing the software on my Linux machine and getting it configured was fairly straightforward, however I'm having trouble getting MySQL 5.1 Server installed and configured on Windows 7 Professional 64-bit. I'm currently using the Windows MSI Installer for the complete MySQL 5.1 system (as opposed to the Essentials installer also available). I've tried to install using both the 32-bit and 64-bit versions of MySQL 5.1 - the same events occur in both. I've installed both the Server Instance Configuration Wizard and Workbench and everything appears to be installed just fine. When I open the Instance Configuration Wizard, I select Detailed Configuration. On the next screen, I select Development Environment, then Multifunctional Database on the next screen. I leave the InnoDB settings unchanged. I select Manual Setting with 5 concurrent connections. I enable TCP/IP Networking on Port 3306 and Enable Strict Mode. I select the Standard Character Set. I check the boxes for Install as a Windows Service (and provide the name "MySQL") and Include the Bin Directory in Windows PATH. On the next screen, I set my root user name and password. I do not enable root access from remote machines and I also do not create an anonymous account. On the final screen of the wizard, when I click "Execute", the first two tasks (Prepare Configuration and Write Configuration File) complete. However, when it reaches Start Service, the wizard hangs and becomes unresponsive ("Not Responding" appears in the title bar and Task Manager). I would really like to be able to use both my Windows and Linux laptops as full-blown mobile development environments, but I can't do that without being able to run MySQL. Has anyone encountered this problem before? What options do I have to correct it?

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• Cloned Win7: Keyboard doesn't work

  - by Marc

  I cloned my old Windows7 hard disk to a shiny new Seagate Momentus XT 500GB using the free EaseUs Disk Copy tool on my laptop. After the clone process I used the Windows 7 installation disc to start the automatic startup repair. This took maybe 15 minutes and then my cloned disk was able to start. Now the cloned disk boots until the login screen and then I can't do anything because my keyboard just doesn't work. I tried connecting an external USB keyboard but this didn't help. The mouse is working fine. Note that the keyboard works fine in BIOS and in the Windows startup options menu. I booted into safe mode and again the keyboard is not working at all. I also noticed that the letters "Press CTRL+ALT+Delete to login" are now shown in italic font but they used to be shown non-italic on the original disk. I have now replaced the clone with the original disk again and from here everything works fine. Doesn't anybody have an idea how I can get my keyboard back?

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• Network structure --> Server 2k8r2 <--> Livebox <--> Router <--> Other PCs

  - by Yusuf

  I have a Livebox connection to the Internet and I have set up my network as follows: - Livebox <--> Win2k8R2 Server - Livebox <--> Netgear N150 Router - Router <--> Other PCs Therefore, in my LAN, - the Livebox has IP address 192.168.1.1, - the Router 192.168.1.12 (when accessed from the Livebox or the server), - the Router 10.0.0.1 (when accessed from the PCs connected to the Router), - the server 192.168.1.2, - the PCs 10.0.0.x I was using a previous configuration, which was as follows: - Livebox <--> Netgear N150 Router - Router <--> Win2k8R2 Server - Router <--> Other PCs Everything was simple, and I just had to forward all ports for incoming connection on the Livebox to the Router, and then forward the specific ports to the Server as needed (it must be however noted that any server I use is found on the Win2k8R2 server itself). In this previous configuration, the IP addresses were as follows: - Livebox 192.168.1.1 - Router 192.168.1.12 (when seen from Livebox) - Router 10.0.0.1 (when seen from server & PCs connected to it) - Server 10.0.0.2 - PCs 10.0.0.x So now of course, my port-forwarding does not work anymore since the server is not connected (directly) to the Router. What I would like to know is how do I configure the Livebox and Router to still have the features like before? From what I understand of networks (which is very limited, btw), I see these options: Make the router assign IPs like 192.168.1.x (but then I want the forwarding to be done from the router itself, is it possible?) The forwarding on the router to the server uses IP address 10.0.0.2. I could change it to 192.168.1.2 (Is that even possible, does it work?) Forward all ports from the Livebox itself to the server, and then manage them there (Is software-based port-forwarding as secure as hardware-based?)

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• Apache: How to enable Directory Index browsing at the Doc Root level?

  - by Brian Lacy

  I have several web development projects running on Fedora 13. I generally setup Apache to serve my larger projects as Virtual Hosts, but I've got several small projects cycling through that I don't really care to setup a VirtualHost for each one. Instead I'd like them all under a subdirectory of the main VirtualHost entry. I just want Apache to serve me the directory index when I browse to the host name. For example, the hostname projects.mydomain.com refers to /var/www/projects, and that directory contains only subdirectories (no index file). Unfortunately when I browse to the host directly I get: Forbidden You don't have permission to access / on this server. Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request. But my virtual host entry in my apache config looks like this: <VirtualHost *> ServerName projects.mydomain.com DocumentRoot /var/www/projects <Directory "/var/www/projects"> Options +FollowSymlinks +Indexes AllowOverride all </Directory> </VirtualHost> What am I missing here?

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• Methods to transfer files from Windows server to linux server

  - by Raze2dust

  Hi, I need to transfer webserver-log-like-files containing periodically from windows production servers in the US to linux servers here in India. The files are ~4 MB in size each and I get about 1 file per minute. I can take about 5 mins lag between the files getting written in windows and them being available in the linux machines. I am a bit confused between the various options here as I am quite inexperienced in such design: I am thinking of writing a service in C#.NET which will periodically archive, compress and send them over to the linux machines. These files are pretty compressible. WinRAR can convert 32 MB of these files into a 1.2 MB archive. So that should solve the network transfer speed issue. But then how exactly do I transfer files to linux? I could mount linux drive on windows server using samba, or should I create an ftp server, or send the file serialized as a POST request. Which one would be good? Also, I have to minimize the load on the windows server. Mount the windows drive on linux instead. I could use the mount command or I could use samba here (What are the pros and cons of these two?). I can then write the compressing and copying part in linux itself. I don't trust the internet connection to be very stable, so there should be a good retry mechanism and failure protection too. What are the potential gotchas in these situations, and other points that I must be worried about? Thanks, Hari

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• Windows 8 Internet Explorer 11 proxy automation script

  - by Stefan Bollmann

  Similar to this post, I'd like to change my proxy settings using a script. However, it fails. When I am behind the proxy, IE does not connect to the internet. Here I try the first solution from craig: function FindProxyForURL(url, host) { if (isInNet(myIpAddress(), "myactualip", "myactualsubnetip")) return "PROXY proxyasshowninpicture:portihavetouseforthisproxy_see_picture"; else return "DIRECT"; } This script is saved as proxy.pac in c:\windows and my configuration is* in LAN settings: No automatically detected settings, yes, use automatic config script: file://c:/windows/proxy.pac No proxy server. So, what am I doing wrong? ---------------- update -------------- However, when I set up a proxy in my LAN configurations: IE -> Internet Options -> Connections -> LAN Settings check: Use a proxy Server for your LAN Address: <a pingable proxy> Port: <portnr> everything is fine for this environment. Now I try a simpler script like function FindProxyForURL(url, host) { return "PROXY <pingable proxy>:<portnr>; DIRECT"; } With a configuration described above** I am not able to get through the proxy.

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• Western Digital HDD disappears and reappears in BIOS

  - by tbkn23

  I know many people asked about similar problems, but I have a very specific case where I can't understand what's going on... I have a 3TB Western Digital Caviar Green disk connected in my Desktop, that also has a seagate 1.5TB disk and 2 SSD drives (OCZ and Sandisk). After working fine for quite some time (probably more than a year), suddenly my Caviar Green drive disappeared from windows. I checked the BIOS, and it wasn't there either. I opened my PC, played with the connectors, power, etc, but nothing helped. Even tried switching connectors with those of the 1.5TB disk, and nothing changed, the 1.5TB seagate was there, but the 3TB WD was not. Ok, now for the strange part. I have another desktop at home, so I took out my 3TB drive, connected it there, and it worked fine! I copied the most important files out of it, and then made another attempt in the original desktop. Surprise! It now appeared in the BIOS and worked fine! I even ran the SMART test with the WD tools and it said everything was intact. It doesn't end here. After leaving it overnight in the original desktop, it disappeared again in the morning. I repeated the entire process, connecting it to the second desktop, and there it is again working fine. Now for my question... Whats going on? The disk seems to be appearing on/off in my original Desktop, while other drives there work fine. SMART test says the disk is fine. Any ideas? Is the disk defective and should be replaced? Or maybe there's a problem with the controller in the desktop? I'm using a Gigabyte GA-880GA-UD3H motherboard and tried connecting the drive to both bridges (SATA2 and SATA3 bridges). Thanks EDIT: Power options are set never to turn off hard drives:

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• How can I prevent a DDOS attack on Amazon EC2?

  - by cwd

  One of the servers I use is hosted on the Amazon EC2 cloud. Every few months we appear to have a DDOS attack on this sever. This slows the server down incredibly. After around 30 minutes, and sometimes a reboot later, everything is back to normal. Amazon has security groups and firewall, but what else should I have in place on an EC2 server to mitigate or prevent an attack? From similar questions I've learned: Limit the rate of requests/minute (or seconds) from a particular IP address via something like IP tables (or maybe UFW?) Have enough resources to survive such an attack - or - Possibly build the web application so it is elastic / has an elastic load balancer and can quickly scale up to meet such a high demand) If using mySql, set up mySql connections so that they run sequentially so that slow queries won't bog down the system What else am I missing? I would love information about specific tools and configuration options (again, using Linux here), and/or anything that is specific to Amazon EC2. ps: Notes about monitoring for DDOS would also be welcomed - perhaps with nagios? ;)

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• Software raid 0 with six disks performance

  - by user134880

  I have some problems with disk performance. I have 6 x WD 500Gb RE4 disks. Each disk gives 135Mb/sec throughput. All measurements are made with hdparm with options "-tT" (I know that it is just synthetic test, but I need some start point to make measurements). I have controller with Sil3124 x 4 ports PCI Express 1x So... RAID0 on controller with 2 disks gives 200Mb/s - ok, pcie limit. RAID0 on motherboard with 2 disks gives 270Mb/s - niceeee :) RAID0 on contorller with 4 disks gives 200Mb/s - ok, pcie limit. RAID0 on controller with 4 disks + 1 disks on motherboard = 340Mb/s ... :( RAID0 on controller with 4 disks + 2 disks on motherboard = 300Mb/s .... why? Any ideas? Maybe need more cpu power? Now there is Pentium D Dual core 2.8Ghz, 4Gb RAM. It is dedicated box for storage.. no other activity.

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• Backup data from RAID 1 disk out of its server

  - by Doomsday

  I'm facing with a pretty easy problem in my opinion. I've extracted a working disk from a RAID1 and I'm looking to copy only data (FS and RAID configuration doesn't matter) into another location (another FS). My problem is I'm not able to mount properly this disk into another linux. I've first looked the partition table : # fdisk -l /dev/sdc Disk /dev/sdc: 640.1 GB, 640135028736 bytes 255 heads, 63 sectors/track, 77825 cylinders, total 1250263728 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdc1 63 1249535699 624767818+ fd Linux raid autodetect /dev/sdc2 1249535700 1250017649 240975 fd Linux raid autodetect /dev/sdc3 1250017650 1250258624 120487+ 82 Linux swap / Solaris I've understood I should use dmraid tools. Once installed : # cat /proc/mdstat Personalities : md0 : inactive sdc1[1](S) 624767744 blocks unused devices: <none> And some other informations : # mdadm --examine /dev/sdc1 /dev/sdc1: Magic : a92b4efc Version : 0.90.00 UUID : 8f292f54:7e5aef72:7e5ab5fd:b348fd05 Creation Time : Mon Jun 2 03:39:41 2008 Raid Level : raid1 Used Dev Size : 624767744 (595.82 GiB 639.76 GB) Array Size : 624767744 (595.82 GiB 639.76 GB) Raid Devices : 2 Total Devices : 2 Preferred Minor : 0 Update Time : Tue Feb 7 22:34:59 2012 State : clean Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 Checksum : a505b324 - correct Events : 15148 Number Major Minor RaidDevice State this 1 8 1 1 active sync /dev/sda1 0 0 8 17 0 active sync /dev/sdb1 1 1 8 1 1 active sync /dev/sda1 From here, I've tried to mount but I'm not comfortable with dmtools and how it's working. # mount /dev/sdc1 /mnt/sdc1 mount: unknown filesystem type 'linux_raid_member' # mount /dev/md0 /mnt/sdc1 mount: /dev/md0: can't read superblock I've seen some options to alter RAID array with mdadm but I only want to copy data on its filesystem before wiping them... Anyone has a clue ?

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• In Windows 7, why won't my display stay off despite the power settings saying it should?

  - by Jer

  I'm completely stumped by this. My simple use case is that when I'm in bed, I use a cordless mouse to browse the web, watch videos, etc. - the monitor is across the room. When I'm going to sleep, I want to shut the monitor off. I also want to be able to turn it back on in the morning. I just want to turn the monitor off and on using only the mouse. I thought of creating a power setting that turned the monitor off asap (the shortest amount of time is one minute; that's fine). I have one that does this. It worked great for almost a year on my old XP machine, and for about four months on my new Windows 7 laptop (which I essentially use as a desktop). All of a sudden a couple weeks ago, it just stopped working - my monitor won't turn off on its own anymore. Here are the settings: I tried other options. Based on the advice here I tried nircmd. This seemed great. I created a shortcut with the command line: "C:\Program Files\nircmd\nircmd.exe" cmdwait 1000 monitor off I click this, and in one second the monitor goes off. However about five seconds later it turns back on, and I've been extra careful to make sure the mouse isn't moving. I have no idea what's going on. Based on both of these things, my only guess is that something could be running in the background which somehow makes the computer think it's in use. I've tried killing as many programs as possible but I still get the same behavior. Any advice? I'm mainly curious about how to debug, but am open to other suggestions about turning the monitor off and on with just the mouse as well.

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• Unexpected(?) high 'wasted' memory in memcached

  - by Nanne

  Looking at our memcached stats I think I have found an issue I was not aware of before. It seems that we have a strangely high amount of wasted space. I checked with phpmemcacheadmin for a change, and found this image staring at me: Now I was under the impression that the worst-case scenario would be that there is 50% waste, although I am the first to admit not knowing all the details. I have read - amongst others- this page which is indeed somewhat old, but so is our version of memcached. I think I do understand how the system works (e.g.) I believe, but I have a hard time understanding how we could get to 76% wasted space. The eviction rate that phpmemcacheadmin shows is 2 ev/s, so there is some problem here. The primary question is: what can I do to fix this. I could throw more memory at it (there is some extra available I think), maybe I should fiddle with the slab config (is that even possible with this version?), maybe there are other options? Upgrading the memcached version is not a quickly available option. The secondairy question, out of curiosity, is of course if the rate of 75% (and rising) wasted space is expected, and if so, why. System: This is currently not something I can do anything about, I know the memcached version isn't the newest, but these are the cards I've been dealt. Memcached 1.4.5 Apache 2.2.17 PHP 5.3.5

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• NFS-shared file-system is locking up

  - by fredden

  Our NFS-shared file-system is locking up. Please feel free to ask any questions you feel relevant. :) At the time, there are a lot of processes in "disk sleep" state, and the load averages on our machines sky-rocket. The machines are responsive on SSH, but our the majority of our websites (apache+mod_php) just hang, as does our email system (exim+dovecot). Any websites which don't require write access to the file-system continue to operate. The load averages continue to rise until some kind of time-out is reached, but for at least 10-15 minutes. I've seen load averages over 800, yet the machines are still responsive for actions which don't require writing to the shared file-system. I've been investigating a variety of options, which have all turned out to be red-herrings: nagios, proftpd, bind, cron tasks. I'm seeing these messages in the file server's system log: Jul 30 09:37:17 fs0 kernel: [1810036.560046] statd: server localhost not responding, timed out Jul 30 09:37:17 fs0 kernel: [1810036.560053] nsm_mon_unmon: rpc failed, status=-5 Jul 30 09:37:17 fs0 kernel: [1810036.560064] lockd: cannot monitor node2 Jul 30 09:38:22 fs0 kernel: [1810101.384027] statd: server localhost not responding, timed out Jul 30 09:38:22 fs0 kernel: [1810101.384033] nsm_mon_unmon: rpc failed, status=-5 Jul 30 09:38:22 fs0 kernel: [1810101.384044] lockd: cannot monitor node0 Software involved: VMWare, Debian lenny (64bit), ancient Red Hat (32 bit) (version 7 I believe), Debian etch (32bit) NFS, apache2+mod_php, exim, dovecot, bind, amanda, proftpd, nagios, cacti, drbd, heartbeat, keepalived, LVS, cron, ssmtp, NIS, svn, puppet, memcache, mysql, postgres Joomla!, Magento, Typo3, Midgard, Symfony, custom php apps

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• How to prevent eMule from jamming up the router?

  - by the searcher

  Usually, when eMule is started, after some time, I find that the router is jammed, so the internet connection on that computer stopped working, or it seemed to be waiting for some port to be freed up before it can connect to a website. This sometimes affect even other PCs or Macs using the same router. Is there a way to prevent eMule from hogging too much resource or ports? I see that there is under Options -> Connection "Max Sources/File" and a "Connection Limits - Maximum Connections". Right now I set them to really low numbers: the first to 120 and the second to 200, but what are good numbers to fill in there so that it can work well without jamming up the router or use up the network resource of the PC or Mac? Or could it be that the number of files that are "Waiting" is too high, and used up too much resource? (If so, can emule automatically limit the number to 10 or 20 to prevent using too much resource?) (This happened before on Linksys router, Netgear router, and the AT&T U-verse router.)

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• How to get rid of Windows XP Pro Blue pop up screen

  - by LISA

  Windows XP user-home edition 36 bit. One day I woke to see a blue pop up screen from Microsoft Windows XP Pro. I have not installed anything new myself. The 'add on' pop up always comes on when I open up mozilla to surf the net. I always just close it out to not install anything. I then woke to have colored tabs, the new download status bar at the bottom and this pop up window that asks me to retype two words spaced, a timer of two minutes starts and states if no word put in system will shut off. I have let it run down more than a few times and it does not shut down. No other options to choose from. If I misspell with a lot of letters it tells me I did so, but if I can't read a few letters I guess at it although it is not and it lets me resume what I am doing. This window pops up every single minute no matter what I am doing. Please help, I'm really annoyed with this. I have searched the net all over and don't quit know what to look for anymore

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• What is the best cloud technology to use for MongoDB/GridFS database servers

  - by Nerian

  We are going to launch a service that will require between 1 and 2 GB for file storage per paid user. I am going to use GridFS for storing files. GridFS is a module for MongoDB that allows to store large files in de database. I am pondering the different options for storing the database. But since I am unexperienced at deployment and it is my first time with Mongodb I need your experience. Criteria: I want to spend my time developing my core business, that is, my own application. I am a Ruby on Rails developer. I do not like to mess with server configuration. Hence, I would like a fully managed hosting solution. But I would like to know about any other option, if you think it is worth it. It should be able to scale. Cloud style. Pay as you go. The lower the price, the better. So far I known of these services: https://mongohq.com/pricing https://mongomachine.com/pricing https://mongolab.com/about/pricing/ http://cloudcontrol.com/add-ons/mongodb/ And they seem to be OK for common needs, that is no file storage. But I am going to use GridFS, so the size matters. These services seems to scale, in price, quite poorly. MongoHQ: The larger plan max storage is 20 GB. Seems like a very little storage, for GridFS. MongoMachine: Flat price, 2.5$ per GB. I didn't found the limit. Seems like a good price, comparing the others. MongoLab: 3.984 GB max, which I don't think I will hit, so perfect. 8$ per GB, quite costly. CloudControl: The larger plan is 20 Gb. The custom service starts at 250€ plus some unspecified charge per GB. What is your experience with these services? Any downtimes? Other possibilities? Edit: Added meaning of GridFS

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• Best NIC config when virtual servers need iSCSI storage?

  - by icky2000

  I have a Windows 2008 server running Hyper-V. There are 6 NICs on the server configured like this: NIC01 & NIC02: teamed administrative interface (RDP, mgmt, etc) NIC03: connected to iSCSI VLAN #1 NIC04: connected to iSCSI VLAN #2 NIC05: dedicated to one virtual switch for VMs NIC06: dedicated to another virtual switch for VMs The iSCSI NICs are used obviously for storage to host the VMs. I put half the VMs on the host on the switch assigned to NIC05 and the other half on the switch assigned to NIC06. We have multiple production networks that the VMs could appear on so the switch ports that NIC05 & NIC06 are connected to are trunked and we then tag the NIC on the VM for the appropriate VLAN. No clustering on this host. Now I wish to assign some iSCSI storage direct to a VM. As I see it I have 2 options: Add the iSCSI VLANs to the trunked ports (NIC05 and NIC06), add two NICs to the VM that needs iSCSI storage, and tag them for the iSCSI VLANs Create two additional virtual switches on the host. Assign one to NIC03 and one to NIC04. Add two NICs to the VM that needs iSCSI storage and let them share that path to the SAN with the host. I'm wondering about how much overhead the VLAN tagging in Hyper-V has and haven't seen any discussion about that. I'm also a bit concerned that something funky on the iSCSI-connected VM could saturate the iSCSI NICs or cause some other problem that could threaten storage access for the entire host which would be bad. Any thoughts or suggestions? How do you configure your hosts when VMs connect direct to iSCSI?

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