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• Fedora-13 not detecting USB HDD enclosure (with HDD)

  - by Ramy

  I recently purchased this enclosure: http://www.amazon.com/Inland-2-5-Inc.../dp/B003SZ2Y12 and this HDD: http://www.amazon.com/Seagate-Barrac...3811667&sr=8-1 Now, I let my brother in law use the enclosure with his 160GB disk to back some stuff up. He then gave me that disk in my enclosure and I backed up my computer and my fiances computer. So...obviously, i had no problem mounting that disk. I plan on keeping this disk as my "natural disaster backup" (in case my apartment building burns down, i still have that disk with my stuff backed up). I want to use the 1.5T disk as my regular/more frequent backup device, but it doesn't seem to be mounting to my F-13 machine. I searched through this forum and found someone advising to run the following: # mount -t vfat /dev/sda1 /mnt this is the output i get when I run that: mount: /dev/sda1 already mounted or /mnt busy mount: according to mtab, /dev/sda1 is mounted on /boot Thing is, shouldn't this disk automatically mount just like the LAST disk in the same enclosure with the same USB cable and power supply? Any help would be greatly appreciated. THANKS!

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• General logging won't work in MySQL

  - by leonstr

  I saw on SF that there's an option in MySQL to log all queries. So, in my version (mysql-server-5.0.45-7.el5 on CentOS 5.2) this appears to be a case of enabling the 'log' option, so I edited /etc/my.cnf to add this: [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock user=mysql old_passwords= log=/var/log/mysql-general.log [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid I then created the file and set permissions: # touch /var/log/mysql-general.log # chown mysql. /var/log/mysql-general.log # ls -l /var/log/mysql-general.log -rw-r--r-- 1 mysql mysql 0 Jan 18 15:22 /var/log/mysql-general.log But when I start mysqld I get: 120118 15:24:18 mysqld started ^G/usr/libexec/mysqld: File '/var/log/mysql-general.log' not found (Errcode: 13) 120118 15:24:18 [ERROR] Could not use /var/log/mysql-general.log for logging (error 13). Turning logging off for the whole duration of the MySQL server process. To turn it on again: fix the cause, shutdown the MySQL server and restart it. 120118 15:24:18 InnoDB: Started; log sequence number 0 182917764 120118 15:24:18 [Note] /usr/libexec/mysqld: ready for connections. Can anyone suggest why this isn't working?

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• Choosing the right TV tuner - USB or PCI TV tuners, hardware/software, DVB? Hybrid/combo/analog?

  - by Nucleon

  Greetings, I'll start with some background information so you know what I'm trying to accomplish and then get to my question. I work at a Television station in the US and we are working on setting up an online DVR/Podcast system for all of our newscasts. So basically we would be recording every newscast in HD, encoding it to flv/h.264 for viewing in a browser on flash compatible and iphone/ipad devices, eventually migrating to WebM when it's browser compliant. This task is theoretically pretty simple as it all it involves is a TV tuner device and a program like VLC, MythTV or whatever to schedule and dump it to a file, encode it with VLC/FFMPEG and push it to the streaming server. Now to the hardware, in order to accomplish that task, should I use an internal PCI tuner or a USB 2.0 tuner? Is there a difference? The bus speeds of both are not too far apart, and is the bus speed really relevant in this case? Does it matter if the device has a hardware encoder or a software encoder? On many sites the USB was recommended for ease of set up and use, but would it overly task a processor, or is that not a concern as long as it's a decent PC (at least duo core, 6gb ram). What's the difference between the stick USB and the Box USBs? To my understanding analog is basically gone in the US, so we would want a hybrid or combo tuner correct? How do those differ from DVB? Are there any other features or concepts which I am missing which may influence the recommended product. It would be ideal if the device which could work in both Linux and a Windows environment, to my knowledge most Hauppauge are? Example 1: PCI Hauppage http://www.newegg.com/Product/Product.aspx?Item=N82E16815116033 Example 2: USB 2.0 Box http://www.newegg.com/Product/Product.aspx?Item=N82E16815116029 Example 3: USB 2.0 Stick http://www.newegg.com/Product/Product.aspx?Item=N82E16815116031 Any guidance from the Superusers would be much appreciated!

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• Throttle CPU Usage consumed by Process

  - by Brett Powell

  We run a game-server company where we basically have large amounts of customers sharing a single machine, and are just on their own instance of a Java Process (Minecraft) managed by our Web Control Panels. In the last few game updates released, we have noticed that many of the third-party plugins our customer's use have become poorly written and we are frequently seeing huge CPU increases from certain servers until we manually kill the process. Our Game Panel automatically restarts processes, so killing them is not really an issue. Our problem is that once once of these servers starts consuming 50%+ CPU Usage, it takes atleast 5 minutes to RDP into the machine, locate who it belongs to, shut it down and notify them. Are there any current solutions for Server 2008 which allow for the throttling of CPU usage or worst case, just auto kill a process stuck using that much? As Minecraft is essentially a single-threaded application, we have investigated using Affinity, although with the variations in our Packages and fluctuations in usage, this doesn't work well for us. Some option to throttle the maximum usage a process can use would be perfect, or at least the option to kill a process using that much. Thanks!

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• What can lead to a zone memory exhaustion and how Nginx reacts to it?

  - by Miles Hughes

  What is a possible scenario for exhausting the memory designated to a connection zone with limit_conn_zone directive and what are the implication in this case? Suppose I have this in my configuration: http { limit_conn_zone $binary_remote_addr zone=connzone:1m; ... server { limit_conn connzone 5; which, according to the documentation, allocates 16000 states for connzone on a 64-bit server. It also says that If the storage for a zone is exhausted, the server will return error 503 (Service Temporarily Unavailable) to all further requests. Well, Ok. But what does it mean on practice? When does this happen? Who receives those 503s? Does it mean that if the number of IPs somehow associated with connzone hits 16000 everyone gets a 503 and it's all over? How does Nginx decide? The documentation is weirdly vague on this. So, considering the example config, who would actually get a 503 and under which circumstances and how would things go from there? Same with request zones?

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• Cant connect to MySQL server from Java application

  - by RN

  This is on VPS\Centos server. The MySQL server is pre configured. I am running the Java application on Tomcat My Java web application is not able to connect to the MySQL server. I get an error - "Caused by: java.net.ConnectException: Connection refused" I suspect this to be a configuration problem rather than a coding problem- hence I have posted this on ServerFault And yes, The same web-app is able to connect to MySQL on a different linux box This is the URL that I provided to my Java application (note- it assumes default port) url = "jdbc:mysql://localhost/pickupgames" My first suspicion was that I am running on a non-default port So I tried to find the port where mySQL server is running I tried every trick mentioned in http://serverfault.com/questions/116100/how-to-check-what-port-mysql-is-running-on But no luck ! SHOW GLOBAL VARIABLES LIKE 'PORT'; This shows port 0 netstat -tlnp doesn't show mysql at all /etc/my.cnf It has no port entry telnet localhost 3306 Doesn't connect And in case you are wondering if mysql server is running at all or not It is And I know for sure, because I have been able to login using the mysql command Also # ps -ef|grep 'mysql' root 31839 27662 0 00:49 pts/3 00:00:00 grep mysql root 32452 1 0 Apr02 ? 00:00:00 /bin/sh /usr/bin/mysqld_safe --skip-grant-tables --skip-networking mysql 32504 32452 0 Apr02 ? 00:00:06 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --user=mysql --pid-file=/var/run/mysqld/mysqld.pid --skip-external-locking --socket=/var/lib/mysql/mysql.sock --skip-grant-tables --skip-networking Please note the --skip-networking parameter Does this have something to do with the issue ? Any explanation why I cant connect to mysql server on port 3306 by telnet? Or why it docent show up under netstat? Any suggestion on whet I should try next ?

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• Windows 2008 R2 remote desktop - Double Login

  - by Zulgrib

  After an Active Directory fail RDP connection started to ask for credentials twice (once on local RDP program, second time on remote's logon screen) I already looked at Windows 2008 R2 RDS - Double Login Solution provided there doesn't work for me. The server is alone, without AD/DNS services, RDP service isn't installed I tried every security settings on RDP-Tcp (RDP, Negotiate, SLL) Logon option is set to "Use credentials from the client" Both windows client and server use RDP 7.1 fPromptForPassword regitries are set to 0 Local Computer Policy\Administrative Templates\Windows Components\Remote Desktop Services\Remote Desktop Session Host\Security\Always prompt for password upon connection is set to "Disabled" Why i am sure the problem comes from the server and not the client ? This problem affected a 3rd RDP program on Android too (it was directly showing "preparing desktop previously, on both MS RDP and the 3rd program) No bakcup are available (Else the Active Directory wouldn't be a fail, but just a lose of time) I am wondering if a rule linked to RDP got changed after the AD install+unistall, but i'm unable to find where. While this is not a critic problem, this is very annoying. I don't know if more information are needed, if it's the case and if you are patient enough, please tell me what is missing and i'll edit this post to add the missing informations.

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• IIS8 behind a VPN + Windows Server 2012 - how to properly bind IP+Port

  - by ryugen

  This is my first question so I hope I'm going to give you enough information. I'm running Windows Server 2012 within the Hyper-V environment of my Windows 8 machine. Within Windows Server 2012 I'm running a VPN tool based on openVPN to hide my real IP. When I run IIS8 with the VPN disconnected it works flawlessly through the Internet (port 80 forwarded correctly). But as soon as I connect to the VPN I can't reach my site through the domain anymore. Now I tried basically everything I know which is why I'm asking you guys. I tried binding IIS8 to the IP of my virtual ethernet card. I tried changing the priority of the NIC through the "Network and sharing center" via the advanced tab. I used ipconfig /flushdns in case there was something wrong in the DNS handling. Hell, I even turned off the Windows firewall. I also used a port scanner to verify the problem. The webserver is reachable on port 80 with VPN disconnected and immediately gets unreachable on connect. Theoretically both IPs (my regular one AND the VPN) should be reachable or at least not impair the other one right? Do you have any other suggestion? Do I have to route something somewhere somehow?

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• Finding a backup and synchronization solution

  - by Andrea Zilio

  I'm having difficulties to find a backup and synchronization solution with the following characteristics: Cross-platform: Windows, Linux, Mac Offsite backup (so Internet Backup) Data deduplication Transfer only new/modified bits of modified files Secure: Data encrypted before leaving computer Maintain multiple versions of files (even deleted files) Folder synchronization integrated with backup and across multiple computers connected to the internet (not necessarily in the same LAN) I think that the Folder Sync feature needs a better explanation. The use case is this: you have a desktop pc and a laptop. The desktop pc contains a folder with some files and this folder is part of the backup (so it was selected to be backed up). The laptop does not contain that folder or that files at all. Then you're abroad with your laptop and you need that folder. So you want to be able to open the backup program, select that folder from the backup and download it in your laptop mantaining it synchronized with the backed up version. When you then come back home and switch on your desktop pc you want the folder we're talking about to be updated in the desktop PC. Does anyone knows any service with all these features? I've only found SpiderOak to support all the features I've mentioned but I'm not completely satisfied by the time taken to complete a backup. Sometimes it seems to hang for minutes with no reasons at all and folder synchronization occurs only after all files are backed up (instead folder sync should have a separated queue independent from other backup operations and synchronization should occurs frequently... for example every 5 minutes or less, independently from the frequency of normal backup operations)

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• htaccess not properly rewriting urls

  - by Cameron Ball

  This is a bit of a weird one. I'm doing some work on a server, and I need rewrite rules for directories that actually exist (in some cases, they are more than one level deep) At the moment my .htaccess looks like this: RewriteEngine on RewriteRule ^simfiles/([-\ a-zA-Z0-9:/]+)$ http://mydomain.com/?portal=simfiles&folder=$1 [L] And this is working OK, for example, a url like: mydomain.com/sifmiles/my-files Will get redirected to mydomain.com/?portal=simfiles&folder=my-files Or in the case of a directory structure that is deeper than one level: mydomain.com/sifmiles/my-files/more-of-my-files Will get redirected to mydomain.com/?portal=simfiles&folder=my-files/more-of-my-files I wrote the regex so that it won't match things with a . in the path, because there are css and js files which reside in simfiles/somedirectory, and if I redirect everything then these cannot be loaded. I tried a configuration like this: RewriteEngine on RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^simfiles/([-\ a-zA-Z0-9:/\.]+)$ http://mydomain.com/?portal=simfiles&folder=$1 [L] But that doesn't work, things still don't load properly. So my first question is, how can I achieve this "properly"? I don't like my solution because it means redirects won't occur if the folder has a . in its name. My second problem, is that while the redirection is happening properly, the url becomes: http://mydomain.com/?portal=simfiles&folder=my-files I want the URL to remain clean, like: http://mydomain.com/sifmiles/my-files How can I achieve this?

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• Weird routing issue

  - by Joel Coel

  I'm having some weird internet problems on campus. I know it's something simple, but it's a case where I need another set of eyes. I think I can explain the problem best by posting a tracert: Tracing route to google.com [74.125.45.147] over a maximum of 30 hops: 1 3 ms 3 ms 3 ms 192.168.8.1 2 1 ms 1 ms 1 ms elissaemily-pc.york.edu [192.168.10.5] 3 2 ms 2 ms 2 ms rrcs-76-79-19-33.west.biz.rr.com [76.79.19.33] 4 31 ms 3 ms 2 ms ge-1-1-0.lnclne00-mx41.neb.rr.com [76.85.220.109] 5 20 ms 17 ms 17 ms ge-7-3-0.chcgill3-rtr1.kc.rr.com [76.85.220.137] 6 20 ms 20 ms 19 ms ae-5-0.cr0.chi30.tbone.rr.com [66.109.6.112] 7 19 ms 19 ms 24 ms ae-1-0.pr0.chi10.tbone.rr.com [66.109.6.155] 8 26 ms 24 ms 24 ms 74.125.48.109 9 23 ms 24 ms 21 ms 216.239.46.246 10 39 ms 39 ms 55 ms 209.85.242.215 11 39 ms 39 ms 39 ms 209.85.254.243 12 39 ms 40 ms 96 ms 209.85.253.145 13 39 ms 39 ms 39 ms yx-in-f147.1e100.net [74.125.45.147] Trace complete. Note the second entry in there. Not only is the host name a student's computer, but the ip address doesn't exist. Dhcp shows that host as having a different address and you can't ping any 192.168.10.5. Yet somehow it's routing packets for us (and not very well, either — things are slow right now). The basic network routing table looks like this: Destination Subnet Mask Gateway --------------------------------------- Default Route -- 10.1.1.5 (our firewall) 10.0.0.0 255.0.0.0 -- 192.168.8.0 255.255.252.0 --

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• snort analysis of wireshark capture

  - by Ben Voigt

  I'm trying to identify trouble users on our network. ntop identifies high traffic and high connection users, but malware doesn't always need high bandwidth to really mess things up. So I am trying to do offline analysis with snort (don't want to burden the router with inline analysis of 20 Mbps traffic). Apparently snort provides a -r option for this purpose, but I can't get the analysis to run. The analysis system is gentoo, amd64, in case that makes any difference. I've already used oinkmaster to download the latest IDS signatures. But when I try to run snort, I keep getting the following error: % snort -V ,,_ -*> Snort! <*- o" )~ Version 2.9.0.3 IPv6 GRE (Build 98) x86_64-linux '''' By Martin Roesch & The Snort Team: http://www.snort.org/snort/snort-team Copyright (C) 1998-2010 Sourcefire, Inc., et al. Using libpcap version 1.1.1 Using PCRE version: 8.11 2010-12-10 Using ZLIB version: 1.2.5 %> snort -v -r jan21-for-snort.cap -c /etc/snort/snort.conf -l ~/snortlog/ (snip) 273 out of 1024 flowbits in use. [ Port Based Pattern Matching Memory ] +- [ Aho-Corasick Summary ] ------------------------------------- | Storage Format : Full-Q | Finite Automaton : DFA | Alphabet Size : 256 Chars | Sizeof State : Variable (1,2,4 bytes) | Instances : 314 | 1 byte states : 304 | 2 byte states : 10 | 4 byte states : 0 | Characters : 69371 | States : 58631 | Transitions : 3471623 | State Density : 23.1% | Patterns : 3020 | Match States : 2934 | Memory (MB) : 29.66 | Patterns : 0.36 | Match Lists : 0.77 | DFA | 1 byte states : 1.37 | 2 byte states : 26.59 | 4 byte states : 0.00 +---------------------------------------------------------------- [ Number of patterns truncated to 20 bytes: 563 ] ERROR: Can't find pcap DAQ! Fatal Error, Quitting.. net-libs/daq is installed, but I don't even want to capture traffic, I just want to process the capture file. What configuration options should I be setting/unsetting in order to do offline analysis instead of real-time capture?

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• multiple folder structures/views

  - by Sojourner

  Newbie. Setting up a server for a law firm. Want to set up the folder structure as follows: Client 1 Name -- Matter 1 (i.e. setting up corporation) -- Matter 2 (i.e. divorce) -- Matter 3 (i.e. setting up trust) Client 2 Name -- Matter 1 Client 3 Name -- Matter 1 and so on. But the attorneys prefer navigating a folder structure, more based on what case type: Civil -- Client 1 Name (i.e. Smythe) -- Client 2 Name (i.e. Jones) -- Client 3 Name (i.e. Johson) -- Landlord/Tenant -- Client 1 Name (i.e. Jones) -- Client 2 Name (i.e. Johson) -- Class Action Suits -- Suit 1 -- Suit 2 Personal Injury -- Client 1 Name -- Client 2 Name -- Client 3 Name Criminal -- Client 1 Name (i.e. Smythe) I'd like to know if it's possible to set up the server with the first folder structure (it's more organized and easier to employ scripts), while having the second folder structure available for users who find it easier to deal with the same types of cases grouped together.

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• Add bookmarks to Delicious and Google Bookmarks at the same time

  - by BrianH

  I have used delicious.com (or back then, del.icio.us) to store my bookmarks for a long time now, and I love it. I was looking through some of my Google services, and realized they have a bookmarking service that integrates with your Google searches (I thought they had a bookmarking service before, but it went away? Maybe not). I like delicious just fine - I'm not interested in leaving. But I also like how my Google bookmarks are highlighted (and I'm guessing, brought to the top) in my search results so I can easily tell if I've bookmarked a site (kind of like the "promote up" feature). I can't even count the number of times I search for a site only to find I've been there months or years ago. If sites I've bookmarked in the past are highlighted in my search results, it makes it easier to pick which search result to go to. My question is around bookmarking tools: Is there a bookmarklet or Firefox addon that will let me save a bookmark to multiple services at the same time, in this case, Google and Delicious? Or maybe a service to sync my delicious bookmarks to Google bookmarks on a regular basis? I have used the Delicious addon since the beginning - it would just be nice to add a bookmark to multiple services with 1 addon. For that matter, it would be nice to add Evernote into the mix - click 1 button to save the page to Evernote, and bookmark the page in Google and delicious. EDIT on 7/30/2009 - Summary: A proposed solution is to use the Delicious addon and the GMarks addon to keep the 2 services in sync. I was not able to get the 2 addons to keep everything in sync, so it was also suggest to use the Google Toolbar with the Delicious addon to keep everything in sync. I personally have reservations with letting Google know about every single site I visit, I believe this solution will work, so I am accepting it as the answer. I still wish there was a solution that would let you post a bookmark/page to multiple services at the same time (delicious, google, evernote, digg, diigo, etc.). Thanks!

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• Install Python setuptools on CentOS 6

  - by Ivan

  I'm trying to install setuptools with no success so far. When I do python3.3 ez_setup.py I get the following error: Extracting in /tmp/tmp6nn4cz Traceback (most recent call last): File "ez_setup.py", line 370, in <module> sys.exit(main()) File "ez_setup.py", line 367, in main return _install(tarball, _build_install_args(options)) File "ez_setup.py", line 55, in _install tar = tarfile.open(tarball) File "/usr/local/lib/python3.3/tarfile.py", line 1571, in open raise ReadError("file could not be opened successfully") tarfile.ReadError: file could not be opened successfully I've been reading and it seems that zlib-devel was not installed when the python installation was done. However, I did uncomment line 358 on Modules/Setup to enable zlib before compiling and if I try to import zlib on python3.3 console it works. Also, in case it helps, here is the ldd python3.3: # ldd `which python3.3` linux-vdso.so.1 => (0x00007fff79fda000) libpthread.so.0 => /lib64/libpthread.so.0 (0x00002b96092da000) libdl.so.2 => /lib64/libdl.so.2 (0x00002b96094f6000) libutil.so.1 => /lib64/libutil.so.1 (0x00002b96096fa000) libz.so.1 => /lib64/libz.so.1 (0x00002b96098fe000) libm.so.6 => /lib64/libm.so.6 (0x00002b9609b12000) libc.so.6 => /lib64/libc.so.6 (0x00002b9609d95000) /lib64/ld-linux-x86-64.so.2 (0x00002b96090bc000) What can I do?

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• Startup script for Red5 on Ubuntu 9.04

  - by user49249

  I am creating startup script for Red5 on Ubuntu. Red5 is installed in /opt/red5 Following is a working script on a CentOS Box on which Red5 is running [code] ==========Start init script ========== #!/bin/sh PROG=red5 RED5_HOME=/opt/red5/dist DAEMON=$RED5_HOME/$PROG.sh PIDFILE=/var/run/$PROG.pid # Source function library . /etc/rc.d/init.d/functions [ -r /etc/sysconfig/red5 ] && . /etc/sysconfig/red5 RETVAL=0 case "$1" in start) echo -n $"Starting $PROG: " cd $RED5_HOME $DAEMON >/dev/null 2>/dev/null & RETVAL=$? if [ $RETVAL -eq 0 ]; then echo $! > $PIDFILE touch /var/lock/subsys/$PROG fi [ $RETVAL -eq 0 ] && success $"$PROG startup" || failure $"$PROG startup" echo ;; stop) echo -n $"Shutting down $PROG: " killproc -p $PIDFILE RETVAL=$? echo [ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/$PROG ;; restart) $0 stop $0 start ;; status) status $PROG -p $PIDFILE RETVAL=$? ;; *) echo $"Usage: $0 {start|stop|restart|status}" RETVAL=1 esac exit $RETVAL [/code] What do I need to replace for Ubuntu in the above script. My Red5 is in /opt/red5/ and to start it manually I always do /opt/red5/dist/red5.sh from Ubuntu As I did not find rc.d/functions on Ubuntu on my laptop also /etc/init.d/functions I did not existed. I would like to be able to use them with service as Red hat distributions do. I checked /lib/lsb/init-functions.

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• Linux: Force fsck of a read-only mounted filesystem?

  - by Timothy Miller

  I'm developing for a headless embedded appliance, running CentOS 6.2. The user can connect a keyboard, but not a monitor, and a serial console would require opening the case, something we don't want the user to have to do. This all pretty much obviates the possibility of using a recovery USB drive to boot from, unless all it does is blindly reimage the harddrive. I would like to provide some recovery facilities, and I have written a tool that comes up on /dev/tty1 in place of getty to provide these functions. One such function is fsck. I have found out how to remount the root and other file systems read-only. Now that they are read-only, it should be safe to fsck them and then reboot. Unfortunately, fsck complains to me that the filesystems are mounted and refuses to do anything. How can I force fsck to run on a read-only mounted partition? Based on my research, this is going to have to be something obscure. "-f" just means to force repair of a clean (but unmounted) partition. I need to repair a clean or unclean mounted partition. From what I read, this is something "only experts" should do, but no one has bothered to explain how the experts do it. I'm hoping someone can reveal this to me. BTW, I've noticed that e2fsck 1.42.4 on Gentoo will let you fsck a mounted partition, even mounted read-write, but it seems only to do so if fsck is run from a terminal, so it can ask the user if they're sure they want to do something so dangerous. I'm not sure if the CentOS version does the same thing, but it appears that fsck CAN repair a mounted partition, but it flatly refuses to when not run from a terminal. One last-resort option is for me to compile my own hacked fsck. But I'm afraid I'll mess it up in some unexpected way. Thanks! Note: Originally posted here.

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• Need to link WP Blog with Rails App on Heroku

  - by John Glass

  I have a client who wants to migrate his Rails app to Heroku. However the client also has a blog associated with his domain that runs on WordPress. Currently, the WordPress blog is running happily alongside the Rails app, but once we migrate to Heroku, that clearly won't be possible. The url for the app is like http://mydomain.com, and the url for the blog is like http://mydomain/blog. I realize that the best long-term solution is to redo the blog in a Rails format like Toto or Jekyll. But in the short term, what is the best way to continue hosting the WP blog where it is (or somewhere) but use Heroku to run the app? The client doesn't want the blog to be on a subdomain, but to remain at mydomain/blog for SEO reasons and also since there is traffic to the blog. I have two ideas: Use rack_rewrite or refraction (or just a regular old 301 and Apache mod_rewrite) on the old (non-Heroku) server to redirect the main url from the old site to Heroku. In this case, I can just leave the Wordpress blog running happily where it is. I think?? Is there a reason to choose one of those options (rack_rewrite, refraction, or mod_rewrite) over the others if I do it this way? Switch the DNS info to point to the Heroku site, and then use a 301 redirect from the blog to the old site. But then I'll have to get the old (non-Heroku) site on a subdomain and use some kind of rewrite rules anyway so it looks like it isn't a subdomain. Are either of these approaches preferable, or is there another way to do it that's easier that I'm missing?

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• Kernel panic while loading Mac OS X on VMWare

  - by Vladimir Gritsenko

  I'm trying to run Mac OS X 10.6.3 on VMWare 7.1 from within Windows 7 64 bit. Trying to run the OS X doesn't work - shortly after booting VMWare announces the machine's death with this pop-up message: The CPU has been disabled by the guest operating system. You will need to power off or reset the virtual machine at this point. The console has a more interesting announcement: The real-time clock was not properly initialized on your system! With a dump of the detected CPU speed (~2.9 GHz), FSB (~94 MHz) and bus ratio (31). Somehow, the code that panics is documented in an accidental .diff file here. Apparently, it commits seppuku if the bus ratio is greater than 30. I underclocked my E6500 to a slower speed, but this apparently didn't make any difference. I can think of two possibilities right now: The CPU info being read is constant, and defines the maximum ability of the CPU. In which case it appears I'm screwed. VMWare presents its own CPU info to the machine, which I can perhaps somehow change. If so, how? If these sound completely off, that's because I'm a real newbie in these matters. Here's hoping you guys can show me the light :-)

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• MS SQL Server slows down over time?

  - by Dave Holland

  Have any of you experienced the following, and have you found a solution: A large part of our website's back-end is MS SQL Server 2005. Every week or two weeks the site begins running slower - and I see queries taking longer and longer to complete in SQL. I have a query that I like to use: USE master select text,wait_time,blocking_session_id AS "Block", percent_complete, * from sys.dm_exec_requests CROSS APPLY sys.dm_exec_sql_text(sql_handle) AS s2 order by start_time asc Which is fairly useful... it gives a snapshot of everything that's running right at that moment against your SQL server. What's nice is that even if your CPU is pegged at 100% for some reason and Activity Monitor is refusing to load (I'm sure some of you have been there) this query still returns and you can see what query is killing your DB. When I run this, or Activity Monitor during the times that SQL has begun to slow down I don't see any specific queries causing the issue - they are ALL running slower across the board. If I restart the MS SQL Service then everything is fine, it speeds right up - for a week or two until it happens again. Nothing that I can think of has changed, but this just started a few months ago... Ideas? --Added Please note that when this database slowdown happens it doesn't matter if we are getting 100K page views an hour (busier time of day) or 10K page views an hour (slow time) the queries all take a longer time to complete than normal. The server isn't really under stress - the CPU isn't high, the disk usage doesn't seem to be out of control... it feels like index fragmentation or something of the sort but that doesn't seem to be the case. As far as pasting results of the query I pasted above I really can't do that. The Query above lists the login of the user performing the task, the entire query, etc etc.. and I'd really not like to hand out the names of my databases, tables, columns and the logins online :)... I can tell you that the queries running at that time are normal, standard queries for our site that run all the time, nothing out of the norm.

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• Ubuntu 12.04 cloud edition on Amazon - Apache2 - /etc

  - by jdog

  I have setup a web server on Amazon with 3 Virtual hosts. For some reason I can't get any of the sites going on it, they all show a 404 error. /var/log/apache2/error.log shows "File does not exist: /etc/apache2/htdocs" I have checked: a2ensite all my virtual hosts actually checked softlinks in sites-enabled access rights in /var/www to 777, in case user is not www-data grep -r htdocs /etc/apache2 (returns nothing) ports.conf has NameVirtualHost directive exactly matching Virtual Hosts What else could this be? ports.conf # If you just change the port or add more ports here, you will likely also # have to change the VirtualHost statement in # /etc/apache2/sites-enabled/000-default # This is also true if you have upgraded from before 2.2.9-3 (i.e. from # Debian etch). See /usr/share/doc/apache2.2-common/NEWS.Debian.gz and # README.Debian.gz NameVirtualHost 107.20.169.163:80 Listen 80 <IfModule mod_ssl.c> # If you add NameVirtualHost *:443 here, you will also have to change # the VirtualHost statement in /etc/apache2/sites-available/default-ssl # to <VirtualHost *:443> # Server Name Indication for SSL named virtual hosts is currently not # supported by MSIE on Windows XP. Listen 443 </IfModule> <IfModule mod_gnutls.c> Listen 443 </IfModule> sites-available/www.seleconlight.com <VirtualHost 107.20.169.163:80> ServerName www.seleconlight.com DocumentRoot /var/www/www.seleconlight.com CustomLog /var/log/apache2/www.seleconlight.com-access.log combined ErrorLog /var/log/apache2/www.seleconlight.com-error.log </VirtualHost>

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• Create Windows AMI with instance storage

  - by Jonathan Oliver

  I have a business use case and workflow where local/instance/ephemeral storage for an EC2 instance is ideal. Unfortunately I'm coupled to a Windows platform for this particular task and the EC2 Windows offering appears to have some deficiencies related to AMI creation. In essence, I'm trying to figure out if there's a way to attach local instance storage to a Windows EC2 instance using the typical command line interface (because the Amazon Website GUI doesn't support it) and then to somehow create an AMI based upon that. I've tried creating a snapshot and then creating a Windows AMI based upon the snapshot, but of course the docs say this is unsupported and makes an unbootable AMI. In short, here's what I'm trying to do: Be able to run a Windows instance (EBS/S3 instance doesn't matter) Attach local instance storage as drive D: Persist that configuration as an AMI such that I can start lots of them as necessary from either the GUI, command line, or REST API. Be able to take a launched instance, update software, shutdown, and create another AMI based upon that. Wash, rinse, repeat. One other potential option which isn't horrible, but isn't ideal is to create an AMI which has 2 EBS volumes already attached (system+apps and data). Essentially, every time I startup an instance based upon the AMI it'll create 2 new EBS volumes of pre-determined size. I'm trying to avoid that scenario if possible.

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• need to stop mysql server on my mac os x

  - by al0ne evenings

  I just installed xampp on my mac os x. When I tried start mysql it display a message that mysql is already running on this computer. In order to start mysql stop first mysql. I tried following ways to stop it but neither of them works. mysqladmin version sudo /usr/local/mysql/mysql.server stop //mysql.server command not found mysqladmin -u root -p password shutdown //restarts the server but not shutdown when i use which mysql command it shows this path /usr/local/bin/mysql and when I issue ps aux | grep mysqld command I get following output zafarsaleem 85209 0.0 0.3 2699804 13204 ?? S 7:51AM 0:00.88 /Applications/MAMP/Library/bin/mysqld --basedir=/Applications/MAMP/Library --datadir=/Applications/MAMP/db/mysql --plugin-dir=/Applications/MAMP/Library/lib/plugin --lower-case-table-names=0 --log-error=/Applications/MAMP/logs/mysql_error_log.err --pid-file=/Applications/MAMP/tmp/mysql/mysql.pid --socket=/Applications/MAMP/tmp/mysql/mysql.sock --port=8889 zafarsaleem 85093 0.0 0.0 2435488 924 ?? S 7:51AM 0:00.03 /bin/sh /Applications/MAMP/Library/bin/mysqld_safe --port=8889 --socket=/Applications/MAMP/tmp/mysql/mysql.sock --lower_case_table_names=0 --pid-file=/Applications/MAMP/tmp/mysql/mysql.pid --log-error=/Applications/MAMP/logs/mysql_error_log zafarsaleem 86693 0.0 0.0 2425480 180 s004 R+ 8:30AM 0:00.00 grep mysqld zafarsaleem 86507 0.0 0.3 2678756 11364 ?? S 8:07AM 0:00.63 /usr/local/Cellar/mysql/5.5.20/bin/mysqld --basedir=/usr/local/Cellar/mysql/5.5.20 --datadir=/usr/local/var/mysql --plugin-dir=/usr/local/Cellar/mysql/5.5.20/lib/plugin --max-allowed-packet=32M --log-error=/usr/local/var/mysql/Zafars-MacBook-Pro-2.local.err --pid-file=/usr/local/var/mysql/Zafars-MacBook-Pro-2.local.pid zafarsaleem 86447 0.0 0.0 2435488 920 ?? S 8:07AM 0:00.02 /bin/sh /usr/local/bin/mysqld_safe --max_allowed_packet=32M Please help. How can I resolve this issue.

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• apache2 defaultsite redirect but not virtual host

  - by MMM

  I'm trying to set up a new server with several virtual hosts but also such that if the requested fqdn doesn't match a virtual host then the request is redirected to http://example.com/log.php?url=fqdn I have got the default host redirecting as desired however the virtual host that I have defined doesn't work. I'm testing using a different host and curl -I http://hostname.example.com:8080/ on the command line to read the html headers to check for the redirect header directly rather than following it with a browser (to avoid any caching issues). I have defined a virtualhost as the fqdn of the server but when I use curl to request that virtualhost I get redirected. If I request the server by any other name which doesn't have a virtualhost defined I also get redirected. apache version is 2.2.16 on ubuntu The config (concatenated together in order from a couple of different files) is as follows: Listen 8080 NameVirtualHost * <VirtualHost _default_> ServerAdmin [email protected] RewriteEngine On RewriteRule ^(.*)$ http://example.com/log.php?url=%{HTTP_HOST}$1 [R=302,L] </VirtualHost> <VirtualHost *> <Directory "/var/www"> allow from all Options Indexes </Directory> DocumentRoot /var/www ServerName hostname.example.com </VirtualHost> I've also tried ServerName values of hostname.example.com:* and hostname.example.com:8080 In case I wasn't clear enough: anything.anything.any/something requested from my server should redirect to example.com/log.php?url=anything.anything.any/something foo.example.com (not defined as a VirtualHost) requested from my server should redirect to example.com/log.php?url=foo.example.com hostname.example.com (defined as a VirtualHost) requested from my server should return an html document anothername.example.com (also defined as a VirtualHost) requested from my server should return an html document It turns out that because the servers own fqdn is hostname.example.com that gets redirected to the Default VirtualHost even if there is a named VirtualHost for it. Other fqdn's that are not the same as the servers fqdn work as I intended.

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• Is there a fix to display 0 when arithmetic underflow occurs on the Windows 7 calculator?

  - by Pascal Qyy

  I have a problem that exasperates me: When I take the Windows 7 calculator in standard mode, if I do 4, then v (square root), the result is 2 Fine. But, at this point, if I do - (minus), then 2, the result is -1,068281969439142e-19 instead of 0! OK, I know about ? (machine epsilon), and yes, -1,068281969439142e-19 is less than the 64 bits ? (1.11e-16), so, we have an arithmetic underflow, in other words in this case: 0. Great, my computer is able to represent subnormal numbers instead of just flush to zero when this happens, and it seems that it is an improvement! Subnormal values fill the underflow gap with values where the absolute distance between them are the same as for adjacent values just outside of the underflow gap. This is an improvement over the older practice to just have zero in the underflow gap, and where underflowing results were replaced by zero (flush to zero). BUT: this result is false! when you try to explain the concept of the square root to a child and you end up with this kind of result, it only complicates your task... what is the point to represent subnormal numbers in a standard, non scientific calculator? So, is there a way to fix this?

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