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• Database modularity with EBS volumes

  - by Eclyps19

  I would like to add modularity to my websites on EC2 instances by encapsulating the site files and the mysql files in their own EBS volumes. The end result that I'm going for is the ability to quickly mount a volume or two to different servers running the same AMI (for testing/development/emergency maintenance, etc), as well as maintain separate snapshots of each. I'm able to do this fairly easily with a single database by symlinking my mounted database EBS to the appropriate places (/var/lib/mysql, /etc/my.cnf, /var/log/mysqld.log), but I'm not sure if it would even be possible be possible to have multiple databases on different EBS volumes running concurrently. Example: /website1/www.website.com /database1/ /website2/www.otherwebsite.com /database2/ Could anybody shed some light on this for me? Is it possible? Is it a bad idea? Thanks.

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• Automated method to convert .reg registry file to reg.exe commands

  - by nhinkle

  Occasionally I need to put registry entries into batch files to use in login scripts, unattended installers, etc. While it's pretty easy to add one or two registry commands to a batch file using reg.exe, when there is a large amount of registry data, it becomes tedious. I usually just end up merging an external reg file in those cases, which I would like to avoid, since it ruins the self-contained nature of the batch file. Does anybody know of any tools which can automatically convert a .reg file to a series of REG ADD and REG DELETE commands? This would make life a lot easier! Thanks.

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• Windows 7 has trouble installing software with Visual C++ 2005 & 2008

  - by John Fitzgerald

  I have been reinstalling windows 7 over and over again on an ASUS P5lD2 2Gb Ram 3Ghz P4 because it ultimately looses the contents of "Turn Windows Features On or Off" after I install software like Autocad 2010 & Microsoft Office 2007. I get install errors like 1935 and 1704 on the way tried different fixes at different times (install software in different order to try and isolate problem too). Ultimately I force the software to install after much buggering and end up loosing the contents of "TWFOOO" Should I be installing some older items like .net framework 1.1, 2.0 and visual studio items like vcredist_x86.exe? getting a bit lost because of compounded problems...

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• Help creating image from LVM

  - by jackhab

  I need to duplicate CentOS hard drive image for multiple stations. The HD has the following layout: Disk /dev/sdb: 250GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 32.3kB 107MB 107MB primary ext3 boot 2 107MB 250GB 250GB primary lvm I saved /dev/sdb1 to file with fsarchiver but for sdb2 I get: /fsarchiver savefs an2.fsa /dev/sdb2 oper_save.c#1006,filesystem_mount_partition(): can't detect and mount filesystem of partition [/dev/sdb2], cannot continue. removed an2.fsa Although fsarchiver probe simple correctly detects sdb2 as LVM2_member. Is fsarchiver correct tool for this job? What's wrong? I'm on Ubuntu 9.1 with fsarchiver 0.6.8 and lvm tools installed. Thanks.

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• Help creating image from LVM

  - by jackhab

  I need to duplicate CentOS hard drive image for multiple stations. The HD has the following layout: Disk /dev/sdb: 250GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 32.3kB 107MB 107MB primary ext3 boot 2 107MB 250GB 250GB primary lvm I saved /dev/sdb1 to file with fsarchiver but for sdb2 I get: /fsarchiver savefs an2.fsa /dev/sdb2 oper_save.c#1006,filesystem_mount_partition(): can't detect and mount filesystem of partition [/dev/sdb2], cannot continue. removed an2.fsa Although fsarchiver probe simple correctly detects sdb2 as LVM2_member. Is fsarchiver correct tool for this job? What's wrong? I'm on Ubuntu 9.1 with fsarchiver 0.6.8 and lvm tools installed. Thanks.

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• Open a terminal window & run command, then close the terminal window if command completed successfully?

  - by Caspar

  I'm trying to write a script to do the following: Open a terminal window which runs a long running command (Ideally) move the terminal window to the top left corner of the screen using xdotool Close the terminal window only if the long running command exited with a zero return code To put it in Windows terms, I'd like to have the Linux equivalent of start cmd /c long_running_cmd if long_running_cmd succeeds, and do the equivalent of start cmd /k long_running_cmd if it fails. What I have so far is a script which starts xterm with a given command, and then moves the window as desired: #!/bin/bash # open a new terminal window in the background with the long running command xterm -e ~/bin/launcher.sh ./long_running_cmd & # move the terminal window (requires window process to be in background) sleep 1 xdotool search --name launcher.sh windowmove 0 0 And ~/bin/launcher.sh is intended to run whatever is passed as a command line argument to it: #!/bin/bash # execute command line arguments $@ But, I haven't been able to get the xterm window to close after long_running_cmd is done. I think something like xterm -e ~/bin/launcher.sh "./long_running_cmd && kill $PPID" & might be what I'm after, so that xterm is launched in the background and it runs ./long_running_cmd && kill $PPID. So the shell in the xterm window then runs the long running command and if it completes successfully, the parent process of the shell (i.e. the process owning the xterm window) is killed, thereby closing the xterm window. But, that doesn't work: nothing happens, so I suspect my quoting or escaping is incorrect, and I haven't been able to fix it. An alternate approach would be to get the PID of long_running_cmd, use wait to wait for it to finish, then kill the xterm window using kill $! (since $! refers to last task started in the background, which will be the xterm window). But I can't figure out a nice way to get the PID & exit value of long_running_cmd out of the shell running in the xterm window and into the shell which launched the xterm window (short of writing them to a file somewhere, which seems like it should be unnecessary?). What am I doing wrong, or is there an easier way to accomplish this?

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• Socks5 proxy "Dante" leaves many child processes stuck in FIN_WAIT2 / CLOSE_WAIT state

  - by Asad R.

  I'm running dante v1.2.1 as a SOCKS proxy server. The proxy works fine but at the end of the day there are around 40-50 or more child processes of sockd running even though there are no active connections. lsof shows that the child processes all have sockets in the CLOSE_WAIT and FIN_WAIT2 state. These child processes stay in this state unless I manually killall/restart the daemon. I'm running Gentoo Linux on a 2.6.24-23-xen kernel. I recently upgraded from dante v1.1.19-r4 which was giving me the exact same problem. Is this a configuration issue with Dante, my system, or is it a coding issue in the dante code?

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• How to secure Firefox traffic (+DNS) through SOCKS proxy under Ubuntu 10.04?

  - by Maarx

  I'm using Ubuntu 10.04, and starting a SOCKS proxy with 'ssh -D', and setting Ubuntu to use it with "System - Preferences - Network Proxy". Firefox uses the proxy, and the proxy's IP appears when I visit a site like http://www.whatismyip.com/. My question is, is Firefox resolving DNS requests through this proxy? Is my web-browsing truly secure? (That is, until I exit the other end of the proxy. I know it's insecure after that.) (And I've verified the keys, I'm not being man-in-the-middled) (And--screw it. You know what I mean. Is it resolving DNS requests through the proxy?) I don't know how I would go about verifying such a thing for myself. Using additional hardware such as another debugging proxy is not an option. If Firefox isn't resolving my DNS requests through the SOCKS proxy, how do I go about fixing it?

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• How to download Firefox extensions from addons.mozilla.org without installing them?

  - by kjo

  Pages at the https://addons.mozilla.org/en-US/firefox site often feature buttons that say "Add to Firefox". Clicking on such a button causes a Firefox extension to be downloaded and installed. I am looking for a convenient way to limit this action to the download step only, so that in the end I am left with the downloaded *.xpi file in my disk. Thanks! P.S. The following approach is not only inconvenient: it doesn't work!. Inspect the HTML for the button, and extract a URL like https://addons.mozilla.org/firefox/downloads/latest/1234/addon-1234-latest.xpi?src=search give or take the stuff after .xpi. at the command-line prompt, download this URL with wget or curl. This download attempt just hangs. (Even if it didn't, I'd like to find a less cumbersome approach.)

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• Double VPN Network Authentication

  - by Pyromanci

  I have a project I'm working on and looking for some info. Right now I have a VPN network using Cisco Pix 501's for the vpn clients and a Cisco VPN Concentrator 3000 for the VPN Server. Since the Pix is constantly connected to the vpn, I want to add a extra level of authentication. Meaning when the user on the other end goes to access anything on the VPN they are asked for a username password before the connection is established. I've never done this sort of structure before. So I'm not even sure where to really being or even if my current hardware can do something like this, or if i need to through in some sort of radius/LDAP/Active Directory type server into the mix.

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• I got this message from my host "Exceeded allocated monthly traffic" want to understand problems tha

  - by Amr ElGarhy

  I have a dedicated windows 2008 server and with Allocated monthly traffic: 1500GB, the hosting company sent me "Please take note that the allocated traffic included with your Budget (calculated by GB of traffic) has been exceeded. You will be billed for the exceeding traffic at the end of the month according to the per GB exceeding traffic fee specified on your contract." I checked my Google analytics account and didn't find any big different for the websites traffic this month than previous months. I just want to understand what may cause this sudden increase in traffic this month? may be ftp access? remoting to webserver too much time? or what may cause this? Also, is there any tool in the server to know where the traffic went?

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• Back up of Streaming server

  - by Maxwell

  I want to take a new streaming server for my website which generally holds videos and audio files. But how do we maintain backup of the streaming server if storage size is increasing day by day. Generally on Database servers, like Sql Server, backups can be easily taken and restored very easily as they do not occupy much space for medium range applications. On the other hand how can we take backup of streaming server? If the server fails, the there should be an alternative server / solution that should decrease downtime of the server. How is the back-end architecture of YouTube built to handle this?

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• Disk IO causing high load on Xen/CentOS guest

  - by Peter Lindqvist

  I'm having serious issues with a xen based server, this is on the guest partition. It's a paravirtualized CentOS 5.5. The following numbers are taken from top while copying a large file over the network. If i copy the file another time the speed decreases in relation to load average. So the second time it's half the speed of the first time. It needs some time to cool off after this. Load average slowly decreases until it's once again usable. ls / takes about 30 seconds. top - 13:26:44 up 13 days, 21:44, 2 users, load average: 7.03, 5.08, 3.15 Tasks: 134 total, 2 running, 132 sleeping, 0 stopped, 0 zombie Cpu(s): 0.0%us, 0.1%sy, 0.0%ni, 25.3%id, 74.5%wa, 0.0%hi, 0.0%si, 0.1%st Mem: 1048752k total, 1041460k used, 7292k free, 3116k buffers Swap: 2129912k total, 40k used, 2129872k free, 904740k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1506 root 10 -5 0 0 0 S 0.3 0.0 0:03.94 cifsd 1 root 15 0 2172 644 556 S 0.0 0.1 0:00.08 init Meanwhile the host is ~0.5 load avg and steady over time. ~50% wait Server hardware is dual xeon, 3gb ram, 170gb scsi 320 10k rpm, and shouldn't have any problems with copying files over the network. disk = [ "tap:aio:/vm/dev01.img,xvda,w" ] I also get these in the log INFO: task syslogd:1350 blocked for more than 120 seconds. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syslogd D 00062E4F 2208 1350 1 1353 1312 (NOTLB) c0ef0ed0 00000286 6e71a411 00062e4f c0ef0f18 00000009 c0f20000 6e738bfd 00062e4f 0001e7ec c0f2010c c181a724 c1abd200 00000000 ffffffff c0ef0ecc c041a180 00000000 c0ef0ed8 c03d6a50 00000000 00000000 c03d6a00 00000000 Call Trace: [<c041a180>] __wake_up+0x2a/0x3d [<ee06a1ea>] log_wait_commit+0x80/0xc7 [jbd] [<c043128b>] autoremove_wake_function+0x0/0x2d [<ee065661>] journal_stop+0x195/0x1ba [jbd] [<c0490a32>] __writeback_single_inode+0x1a3/0x2af [<c04568ea>] do_writepages+0x2b/0x32 [<c045239b>] __filemap_fdatawrite_range+0x66/0x72 [<c04910ce>] sync_inode+0x19/0x24 [<ee09b007>] ext3_sync_file+0xaf/0xc4 [ext3] [<c047426f>] do_fsync+0x41/0x83 [<c04742ce>] __do_fsync+0x1d/0x2b [<c0405413>] syscall_call+0x7/0xb ======================= I have tried disabling irqbalanced as suggested here but it does not seem to make any difference.

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• Val2 function in iWork Numbers?

  - by David.Chu.ca

  Is there equivalent Excel Val2() function in Numbers? I want to get value of a cell, which contains formula. What I need to get the result text from the cell. The following is example data: A B C ? 0 what? For example, in cell A1 I have a function like: =Right(C1) which is the end character of string in C1. Then I need to use the result of A1 in B1 =Count(C$1:C1, A1 = "?") As you can see, the result is 0. I think that A1 in above expression is referring to the formula of A1, instead of its result. Is there anything available like this in Numbers? =Count(C$1:C1, Val2(A1) = "?")

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• Use Excel Color Scale Formatting with Text

  - by stumpylog

  I use Excel sheets to track the status of tasks through a set of discrete statuses. I'd like to be able to format these automatically, with the start being red, the end being green and progressing through the combination colors in the middle. Status1 (Red) Status2 (More Red than Green) Status3 (More Green than Red) Status4 (Green) The "Color Scales" option under Conditional Formatting seems like it could be made to work, but it wants numbers. So, my question, can it be done? Using conditional formatting or other formulas to achieve the desired affect?

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• Seeking automated toolchain for WAV cleanup and conversion to MP3 (currently using Audacity manually

  - by Andrew M. Greene

  I use Finale with the Garritan sounds to convert my music into WAV files; after that I manually load each one into Audacity and select all use the "normalize" effect (with default settings) manually select the silence at the beginning of the file and delete it manually select the silence at the end of the file and delete it finally export the whole thing as an MP3 (with specific tag data) This gets tedious, especially as I work on a ten-movement piece with six part-prominent rehearsal "tapes" to accompany the full-score rendition. And there are too many variations in what's going on for me to trust AutoHotKey for this one. Is there a way to script Audacity, or is there another toolchain that would do what I want? I'm running on a WindowsXP laptop with cygwin installed. Thanks!

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• How can I reinstall QoS Packet Scheduler if it was removed from the winxp installation by nLite?

  - by Irwin1138

  I have a WinXP SP3 installation modified by nLite. This particular installation was stripped off the QoS Packet Scheduler. I was advised to remove QoS because of the overhead it produces or something like that. Now, I read this lifehacker post about windows maintenance, and it says that on the contrary, by doing so I may have done more harm than good: Disabling QoS in Windows XP: Rumor had it that Microsoft had permanently tied up 20 percent of your net bandwidth for Windows Update. They didn't, and those who disable QoS, or IPv6, in XP actually end up with some pretty harsh connectivity problems. I tend to believe this, and now I seek a way to reinstall QoS. I tried to install it by going to network adapter properties - install - service, but there is no QoS there. I have the original, untouched WinXP SP3 cd. So, is there a way to bring back QoS into my WinXP installation, preferably without reinstalling windows from scratch?

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• How do you engineers keep your place clean?

  - by 280Z28

  I have a major problem keeping not only my desk, but my entire place clean. I end up spending all of my time behind the keyboard and slowly but surely it all turns to crap everywhere but between my monitors and I. It's causing some major problems IRL and I need to fix it. Question: I'm an engineer, and I eat, sleep, and breathe think like an engineer. Do you have any ideas for engineering a clean place? Note to the messy users out there: Not really interested. I've been messy for ages so I've got that covered. I'm looking for real suggestions from people who actually keep clean, preferably from some who've been in my shoes before.

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• How to boot RHEL with no bash?

  - by nmelmun

  How can I boot a RHEL VM if I deleted /bin/bash? When trying to boot, I now get the following error: "INIT: Cannot execute "/etc/rc/d/rc.sysinit" The next thing I tried was to modify the kernel boot parameters by adding init=/bin/ksh at the end of the line, which gave me a functional shell. After this, in order to get write permissions, I remounted the root partition with: mount -o remount,rw / Then I tried to boot using ksh as the shell by tricking the system into thinking it's bash: ln -s /bin/ksh /bin/bash Then restarted the system normally. Unfortunately this didnt work since ksh is not compatible and /etc/rc.d/rc.sysinit uses several bash-specific tricks. Does anyone else have a suggestion on how I could get the system to boot normally without reinstalling bash?

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• How to stop receiving an error reading iCal invitations on Mac sent from Thunderbird?

  - by Matthew Rankin

  When I open an iCal invitation (Mail Attachment.ics file) in Mac Mail.app sent to me from someone using Thunderbird, I receive the following error: The only solution that I've found to date is to save the Mail Attachment.ics file somewhere like the Desktop, open it in a text editor, and delete the blank lines at the beginning and end of the file. This problem appears to only happen when I'm receiving invitations from people using Thunderbird under Windows. Does anyone know of a better way to solve this problem? Is this a bug in Apple iCal, or is Thunderbird not meeting the iCal spec? Configuration Information OS: Mac OS X 10.6.2 Mail Program: Mac Mail.app ver. 4.2 (1077) Calendar Program: Mac iCal.app ver 4.0.1 (1374)

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• Virtual PC - Display Issue with Ubuntu Server

  - by Christopher R

  Hi Everyone, I just did a clean install of Ubuntu Server 9.04 in Virtual PC on the Windows 7 RC, and it seems to be having a bit of an issue with the virtual machine's display adapter. I've tried setting a VGA flag in the GRUB configuration to no avail. This is a guess, but I think it has something to do with the color console mode that gets enabled by default at boot time. The system starts booting just fine (i.e. the console looks "normal" when I'm asked to enter an LVM passphrase, etc.), but then the display goes wonky after a few seconds and I end up with this. Typing commands in bash works just fine: it's not like the system is frozen or anything, I just can't see anything that I type. The console looks exactly the way it does in the image below.

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• Computer becomes very slow (permanently) after running a bunch of apps

  - by djzmo

  Hello there, My computer with Windows XP installed becomes very slow after I ran some heavy tasks at a time. (play a full 3D online game while extracting a 4GB RAR archive) It freezes for about 200~500ms every few seconds, and this always happens if I do heavy tasks at once in my computer (for example, installing a program while playing games), and the lag remains permanently (even a reboot won't make it better) unless I repair-install the Windows. Since I have a low-end computer: Intel(R) Pentium(R) 4 CPU 2.00 GHz, 512 MB of RAM ATI RADEON 9550 AGP 256 MB And the only way I used everytime to fix this problem is by repair-installing my Windows XP. So that I won't lose any data or installed programs. But I believe there's a better and faster way to fix this without repair-installing the Windows. Any idea?

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• Google Chrome calling nypost.com every ~5 seconds

  - by TonyM

  I'm using Chrome 21.0.1180.49 beta on Mac OS X 10.7.4. Did some Googling and can't figure this out. I visited a page on nypost.com earlier this morning. Just noticed that Little Snitch is reporting that nypost.com is being called every 4-6 seconds or so. I closed the tab after reading the story, a few hours ago. I created a rule in Little Snitch denying access to nypost.com, but Chrome is apparently still connecting to it. (1) Why? and (2) How can I put an end to this? Thanks in advance for any thoughts.

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• Generate a certificate with Openssl and import the same certificate using keytool

  - by Safari

  I have a question about the SSL during the use of CAS in LIferay. I have generate the certificate using Openssl (I flollowed this tutorial) on my CAS Server and now I would to import the certificate using keytool on the Liferay machine. To import the certificate with keytool I use this command: keytool -import -alias tomcatLiferay -file /myopensslcertificate.crt But when I import the .crt certificate file and I check the CAS connection I get the message: SSL Error. IF I try to generate the certificate using keytool (keytool -genkey...) on the CAS server end I import this certificate using keytool -import .... I can connect to the CAS server and I not see any errors... I think that I use a wrong way to generate the certificate with openssl or a wrong way to import the certificate (generated with openssl) with keytool.

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• changing timezone with dpkg-reconfigure tzdata and debconf-set-selections

  - by Carlos Campderrós

  I want to set up a script that automatically changes the timezone on a machine (running ubuntu 11.10) and also sets the right values to the debconf database. I've tried the following, but it does not work (at the end, the current timezone remains unchanged, and if I run manually the dpkg-reconfigure tzdata command, the selected values are indeed the old ones): #!/bin/sh -e echo "tzdata tzdata/Areas select Europe" | debconf-set-selections echo "tzdata tzdata/Zones/Europe select Madrid" | debconf-set-selections echo "tzdata tzdata/Zones/America select " | debconf-set-selections dpkg-reconfigure -f noninteractive tzdata So, by now, I'm doing it messing with the files /etc/localtime and /etc/timezone directly, but I'd rather prefer the dpkg-reconfigure and debconf way.

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