Daily Archives

Articles indexed Sunday June 3 2012

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• Calculate data transferred in a local LAN

  - by ramdaz

  How do you calculate the data flown between a computer and the gateway computer. I have a Linux router/gateway running IP Tables which routes internet traffic in a LAN. I have individual users with IP/MAC Address mapped who access Interet through the gateway computer. I would like to find out the traffic utilized by individual users. Is it possible for us to find out what kind of traffic was HTTP, SMTP, FTP etc. Is it also possible to pool the information on hourly basis, and get specific info so that I can store information in a database? I have heard of IP Accounting? Is that the right way

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• VMware vSphere Hypervisor 5 with Intel SPL 5000 in Raid 0 no boot from DVD?

  - by Richard

  I hope this is the correct StackExchange, since I am only using StackOverflow for Web development, but need some help with my server configuration. I would like to install VMware vSphere Hypervisor 5 on my server here at home and run a view machines on it such as Windows Server 2008 and Red Hat. I used to have either OpenSuse or Windows Server 2008 installed but I would like to get into VMWare Hypervisor. My hardware configuration: - Intel S5000PSL with bios version S5000.86B.10.60.0091 build date 10/09/2008 as of read out of bios - E5420 @ 2.5GHz Intel Xeon CPU The Intel Virtualization Technology is enabled in the BIOS - DVD DH20A4P DVD Writer - 8GB ECC Ram I have configured a RAID 0 on my 2 WD 2TB SATA drives I have burned the Hypervisor 5 on an empty DVD and it is bootable, I tested it on my client PC. The main problem here is basically, that I cannot boot the DVD on my server. I have set the Boot Option to the DVD drive. I have booted from the BIOS straight in the DVD drive and it does not work. I do not see any error messages. The only thing I see are the PXE error messages when it tries booting from the network and other devices, obviously without any result. Does anybody know why I cannot boot the DVD? What could cause the problem? I have sucessfully installed Windows Server 2008 via original DVD about 1 year ago, so the DVD drive can read and does work. The DVD drive is available in the BIOS and I have checked all cables and none of them is loose in any way. I even see the light flashing but it does not want to boot from the DVD. I am looking forward to suggestions and things that I should check. Thank you very much

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• Nginx $scheme doesn't always work while using SSL for one specific page

  - by jjiceman

  I read and followed this question in order to configure nginx to force SSL for one page (admin.php for XenForo), and it is working well for a few of the site administrators but is not for myself. I was wondering if anyone has any advice on how to improve this configuration: ... ssl_certificate example.net.crt; ssl_certificate_key example.key; server { listen 80 default; listen 443 ssl; server_name www.example.net example.net; access_log /srv/www/example.net/logs/access.log; error_log /srv/www/example.net/logs/error.log; root /srv/www/example.net/public_html; index index.php index.html; location / { if ( $scheme = https ){ rewrite ^ http://example.net$request_uri? permanent; } try_files $uri $uri/ /index.php?$uri&$args; index index.php index.html; } location ^~ /admin.php { if ( $scheme = http ) { rewrite ^ https://example.net$request_uri? permanent; } try_files $uri /index.php; include fastcgi_params; fastcgi_pass 127.0.0.1:9000; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; fastcgi_param HTTPS on; } location ~ \.php$ { try_files $uri /index.php; include fastcgi_params; fastcgi_pass 127.0.0.1:9000; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; fastcgi_param HTTPS off; } } ... It seems that the extra information in the location ^~ /admin.php block is unecessary, does anyone know of an easy way to avoid duplicate code? Without it it skips the php block and just returns the php files. Currently it applies https correctly in Firefox when I navigate to admin.php. In Chrome, it downloads the admin.php page. When returning to the non-https website in Firefox, it does not correctly return to http but stays as SSL. Like I said earlier, this only happens for me, the other admins can go back and forth without a problem. Is this an issue on my end that I can fix? And does anyone know of any ways I could reduce duplicate configuration options in the configuration? Thanks in advance!

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• What is causing the unusual high load average and IOwait?

  - by James

  I noticed on Tuesday night of last week, the load average went up sharply and it seemed abnormal since the traffic is small. Usually, the numbers usually average around .40 or lower and my server stuff (mysql, php and apache) are optimized. I noticed that the IOWait is unusually high even though the processes is barely using any CPU. top - 01:44:39 up 1 day, 21:13, 1 user, load average: 1.41, 1.09, 0.86 Tasks: 60 total, 1 running, 59 sleeping, 0 stopped, 0 zombie Cpu0 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu1 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu2 : 0.0%us, 0.3%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu3 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu4 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu5 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu6 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu7 : 0.0%us, 0.0%sy, 0.0%ni, 91.5%id, 8.5%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 1048576k total, 331944k used, 716632k free, 0k buffers Swap: 0k total, 0k used, 0k free, 0k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1 root 15 0 2468 1376 1140 S 0 0.1 0:00.92 init 1656 root 15 0 13652 5212 664 S 0 0.5 0:00.00 apache2 9323 root 18 0 13652 5212 664 S 0 0.5 0:00.00 apache2 10079 root 18 0 3972 1248 972 S 0 0.1 0:00.00 su 10080 root 15 0 4612 1956 1448 S 0 0.2 0:00.01 bash 11298 root 15 0 13652 5212 664 S 0 0.5 0:00.00 apache2 11778 chikorit 15 0 2344 1092 884 S 0 0.1 0:00.05 top 15384 root 18 0 17544 13m 1568 S 0 1.3 0:02.28 miniserv.pl 15585 root 15 0 8280 2736 2168 S 0 0.3 0:00.02 sshd 15608 chikorit 15 0 8280 1436 860 S 0 0.1 0:00.02 sshd Here is the VMStat procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 1 0 0 768644 0 0 0 0 14 23 0 10 1 0 99 0 IOStat - Nothing unusal Total DISK READ: 67.13 K/s | Total DISK WRITE: 0.00 B/s TID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND 19496 be/4 chikorit 11.85 K/s 0.00 B/s 0.00 % 0.00 % apache2 -k start 19501 be/4 mysql 3.95 K/s 0.00 B/s 0.00 % 0.00 % mysqld 19568 be/4 chikorit 11.85 K/s 0.00 B/s 0.00 % 0.00 % apache2 -k start 19569 be/4 chikorit 11.85 K/s 0.00 B/s 0.00 % 0.00 % apache2 -k start 19570 be/4 chikorit 11.85 K/s 0.00 B/s 0.00 % 0.00 % apache2 -k start 19571 be/4 chikorit 7.90 K/s 0.00 B/s 0.00 % 0.00 % apache2 -k start 19573 be/4 chikorit 7.90 K/s 0.00 B/s 0.00 % 0.00 % apache2 -k start 1 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % init 11778 be/4 chikorit 0.00 B/s 0.00 B/s 0.00 % 0.00 % top 19470 be/4 mysql 0.00 B/s 0.00 B/s 0.00 % 0.00 % mysqld Load Average Chart - http://i.stack.imgur.com/kYsD0.png I want to be sure if this is not a MySQL problem before making sure. Also, this is a Ubuntu 10.04 LTS Server on OpenVZ. Edit: This will probably give a good picture on the IO Wait top - 22:12:22 up 17:41, 1 user, load average: 1.10, 1.09, 0.93 Tasks: 33 total, 1 running, 32 sleeping, 0 stopped, 0 zombie Cpu(s): 0.6%us, 0.2%sy, 0.0%ni, 89.0%id, 10.1%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 1048576k total, 260708k used, 787868k free, 0k buffers Swap: 0k total, 0k used, 0k free, 0k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1 root 15 0 2468 1376 1140 S 0 0.1 0:00.88 init 5849 root 15 0 12336 4028 668 S 0 0.4 0:00.00 apache2 8063 root 15 0 12336 4028 668 S 0 0.4 0:00.00 apache2 9732 root 16 0 8280 2728 2168 S 0 0.3 0:00.02 sshd 9746 chikorit 18 0 8412 1444 864 S 0 0.1 0:01.10 sshd 9747 chikorit 18 0 4576 1960 1488 S 0 0.2 0:00.24 bash 13706 chikorit 15 0 2344 1088 884 R 0 0.1 0:00.03 top 15745 chikorit 15 0 12968 5108 1280 S 0 0.5 0:00.00 apache2 15751 chikorit 15 0 72184 25m 18m S 0 2.5 0:00.37 php5-fpm 15790 chikorit 18 0 12472 4640 1192 S 0 0.4 0:00.00 apache2 15797 chikorit 15 0 72888 23m 16m S 0 2.3 0:00.06 php5-fpm 16038 root 15 0 67772 2848 592 D 0 0.3 0:00.00 php5-fpm 16309 syslog 18 0 24084 1316 992 S 0 0.1 0:00.07 rsyslogd 16316 root 15 0 5472 908 500 S 0 0.1 0:00.00 sshd 16326 root 15 0 2304 908 712 S 0 0.1 0:00.02 cron 17464 root 15 0 10252 7560 856 D 0 0.7 0:01.88 psad 17466 root 18 0 1684 276 208 S 0 0.0 0:00.31 psadwatchd 17559 root 18 0 11444 2020 732 S 0 0.2 0:00.47 sendmail-mta 17688 root 15 0 10252 5388 1136 S 0 0.5 0:03.81 python 17752 teamspea 19 0 44648 7308 4676 S 0 0.7 1:09.70 ts3server_linux 18098 root 15 0 12336 6380 3032 S 0 0.6 0:00.47 apache2 18099 chikorit 18 0 10368 2536 464 S 0 0.2 0:00.00 apache2 18120 ntp 15 0 4336 1316 984 S 0 0.1 0:00.87 ntpd 18379 root 15 0 12336 4028 668 S 0 0.4 0:00.00 apache2 18387 mysql 15 0 62796 36m 5864 S 0 3.6 1:43.26 mysqld 19584 root 15 0 12336 4028 668 S 0 0.4 0:00.02 apache2 22498 root 16 0 12336 4028 668 S 0 0.4 0:00.00 apache2 24260 root 15 0 67772 3612 1356 S 0 0.3 0:00.22 php5-fpm 27712 root 15 0 12336 4028 668 S 0 0.4 0:00.00 apache2 27730 root 15 0 12336 4028 668 S 0 0.4 0:00.00 apache2 30343 root 15 0 12336 4028 668 S 0 0.4 0:00.00 apache2 30366 root 15 0 12336 4028 668 S 0 0.4 0:00.00 apache2

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• Web server with static IP from cable provider

  - by Dmitri

  I have a subscription to 5 static IP addresses. I want to run a web server from behind a router. My network config is as follows: Server's local address is 10.1.10.2, has IIS running on it, port 80 and 443 (IIS is not my fault, had to be done) the server's ip address is static, the subnet mask is 255.255.255.0, gateway is 10.1.10.1, which is the local address of the cable modem / router / gateway thingy. All looks to be in textbook order as far as the LAN goes. I can get to anything on my LAN from any computer on my LAN, whether they have static IP or get it through DHCP from the cable modem/router thingy. however, I have no internet access form any of my LAN computers. I called Comcast tech support and they say they can connect to my modem/router just fine and can actually use it to ping any computer on the internet or any computer on my LAN from the router/modem (i checked, myself, this is in fact the case). However, nothing on my LAN has internet connectivity. I tried pinging the DNS servers, nothing. I tried directly typing in web sites' IP addresses, nothing, so doesn't seem to be a DNS issue. Any Ideas? What malfunction of a router could be causing such weird behavior? nay ideas or educated guesses are very much appreciated.

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• How to verify PostgreSQL 9 has installed correctly on a CentOS server?

  - by A4J

  I'm trying to install the PG (postgres) gem on a CentoOS server, but it keeps saying Postgres is too old, even though I have upgraded it to 9.1.3 (as per the instructions here http://www.davidghedini.com/pg/entry/install_postgresql_9_on_centos). I am using CentOS 5.8 (and Ruby 1.9.3) Here is the error message: Building native extensions. This could take a while... ERROR: Error installing pg: ERROR: Failed to build gem native extension. /usr/local/bin/ruby extconf.rb checking for pg_config... yes Using config values from /usr/bin/pg_config checking for libpq-fe.h... yes checking for libpq/libpq-fs.h... yes checking for pg_config_manual.h... yes checking for PQconnectdb() in -lpq... yes checking for PQconnectionUsedPassword()... no Your PostgreSQL is too old. Either install an older version of this gem or upgrade your database. *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. psql --version confirms my version: psql (PostgreSQL) 9.1.3 I can confirm packages installed: Setting up Install Process Package postgresql91-9.1.3-1PGDG.rhel5.x86_64 already installed and latest version Package postgresql91-devel-9.1.3-1PGDG.rhel5.x86_64 already installed and latest version Package postgresql91-server-9.1.3-1PGDG.rhel5.x86_64 already installed and latest version Package postgresql91-libs-9.1.3-1PGDG.rhel5.x86_64 already installed and latest version Package postgresql91-contrib-9.1.3-1PGDG.rhel5.x86_64 already installed and latest version Nothing to do Any ideas on how to troubleshoot this? Thanks in advance.

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• PHP-FPM not working with nginx and CentOS

  - by Daniel

  After failing to get FastCGI to work with PHP I have installed the PHP-FPM service which is reported to work out of the box, however PHP files are downloading instead of executing. This is what I have in the nginx.conf file: server { listen 80; server_name pubserver; root /usr/share/nginx/html; location ~ \.php$ { fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME /usr/share/nginx/html$fastcgi_script_name; fastcgi_param PATH_INFO $fastcgi_script_name; include /etc/nginx/fastcgi_params; } } The command netstat -tulpn | grep :9000 displays this which suggests PHP-FPM is running: tcp 0 0 127.0.0.1:9000 0.0.0.0:* LISTEN 1058/php-fpm.conf)

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• Is this normal? Multiple httpd process

  - by ilcreatore

  I'm testing a new Server. This isnt really a peak time for my server (2pm), but still its running a bit slow, I was checking the ESTABLISHED connections using the following command: # netstat -ntu | grep :80 | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n http://i.stack.imgur.com/cZuvP.jpg My MaxClients are set to 50. So as you can see on the picture, only 10 people are eating most of my ram. I got a server with 4GB Ram (2.7GB free for apache) but each apache process is eating 53MB each, wich mean im only allowed to accept 50 process. The KeepAlive = Off, but I notice those connections arent closing fast enough, is that normal?

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• cpanel api fileman alternative

  - by Coombesy

  trying to remotely unpack a zip file, then move the contents on cpanel servers. Some research led me to xmlApi class and the fileman module. And here my problem lies as Fileman module is returning html based on the cpanel theme (which we won't know) - and all I need is a list of files. here is the code flow: * using ftp, the zip is uploaded * using Fileman module unpack zip * loop through unpacked files and move here is my call to list the files: $files_html = $xml->api1_query($user, "Fileman", "listfiles", array( "{$ftp_dir}", //source dir 0 //chooser )); and it is returning the html for the filemanager - which is going to be different based on the cpanel theme. Surely their has to be another way to simply just list the files in that directory? any help would be appreciated, been researching this for past day and can't find solution anywhere. cheers ;)

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• Forwarding MySQL connection with iptables and differents network interfaces

  - by Emilio Nicolás

  I have a PC with Ubuntu as a router. It has a 3G connection with a public IP to the Internet, and there is a private wireless subnet. So it has two active interfaces: ppp0: public IP (WAN) wlan0: private IP (LAN) With iptables I wannt to forward every MySQL connection (port 3306) to a local machine (10.42.43.10) of the subnet. I type these iptables commands: iptables -A PREROUTING -t nat -i ppp0 -p tcp --dport 3306 -j DNAT --to 10.42.43.10:3306 iptables -A FORWARD -p tcp -i ppp0 -o wlan0 -d 10.42.43.10 --dport 3306 -j ACCEPT But it doesn't work. telnet publicip 3306 fails :-( Any help will be appreciated. Thanks!

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• Adding data sources for unixODBC/isql on Mac OSX Lion

  - by NP01

  I have installed unixODBC from source and mysql-odbc connector from .dmg installer on Mac OSX Lion. This was done a while ago, and at that time I successfully installed a data source (let's call it foo). Now I am trying to add another data source (DSN). I've done this through both ODBC Manager and the command-line tool myodbc-installer given with the tar bundle of the mysql-odbc connector from the mysql website. An entry shows up in /Library/ODBC/odbc.ini, which looks like this: [ODBC Data Sources] bar = MySQL ODBC 5.1 Driver [ODBC] Trace = 0 TraceAutoStop = 0 TraceFile = TraceLibrary = [myodbc] Driver = /usr/local/lib/libmyodbc5.so SERVER = localhost PORT = 3306 [bar] Driver = /usr/local/lib/libmyodbc5.so Description = DATABASE = bar However, isql fails to find it: anitya:Preferences neil$ isql bar bar bar -v [IM002][unixODBC][Driver Manager]Data source name not found, and no default driver specified [ISQL]ERROR: Could not SQLConnect Weird thing is, the old DSN foo, which is not to be seen in /Library/ODBC/odbc.ini or /etc/odbc.ini, works fine: anitya:Preferences neil$ isql foo foo foo +---------------------------------------+ | Connected! | | | | sql-statement | | help [tablename] | | quit | | | +---------------------------------------+ SQL> I'm miffed about where the DSN entries need to be entered on OSX Lion to be found by isql. Thanks in advance for your help!

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• What characteristic of networking/TCP causes linear relation between TCP activity and latency?

  - by DeLongey

  The core of this problem is that our application uses websockets for real-time interfaces. We are testing our app in a new environment but strangely we're noticing an increasing delay in TCP websocket packets associated with an increase in websocket activity. For example, if one websocket event occurs without any other activity in a 1-minute period, the response from the server is instantaneous. However, if we slowly increase client activity the latency in server response increases with a linear relationship (each packet will take more time to reach the client with more activity). For those wondering this is NOT app-related since our logs show that our server is running and responding to requests in under 100ms as desired. The delay starts once the server processes the request and creates the TCP packet and sends it to the client (and not the other way around). Architecture This new environment runs with a Virtual IP address and uses keepalived on a load balancer to balance the traffic between instances. Two boxes sit behind the balancer and all traffic runs through it. Our host provider manages the balancer and we do not have control over that part of the architecture. Theory Could this somehow be related to something buffering the packets in the new environment? Thanks for your help.

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• Dell PE2950 - slow IO rates for writing and reading locally

  - by OrenM

  I'm having a serious issue with dell server PE2950. The server has really slow IO rates, so slow that I'm not able to use it anymore I tried few things to solve this: changing disks to new disks (configured them as raid1) changing perc card + perc cables reinstalling the OS of course, had to cause of changing of disks, centos 5.5 x64bit firmware update to everything virtual disks policy: No Read Ahead,Write Back, disk cache policy disabled. openmanage doesn't alert about anything, also i ran dell's diag tests, everything passed, also dell didn't see anything in deset log. dell offered to reseat everything, including the cpu, we did that as well, still io rates are slow I have several PE2950 servers, and I never had such a thing with any of those. All have similar or exact hardware as this one, all configured the same, with the same os centos 5.5 x64, same disks, same raid, same policy. Just for comparison: the problematic PE2950 server: [root@bad ~]# time sh -c "dd if=/dev/zero of=/tmp/ddfile bs=8k count=200000 && sync" 200000+0 records in 200000+0 records out 1638400000 bytes (1.6 GB) copied, 27.7946 seconds, 58.9 MB/s real 0m33.968s user 0m0.531s sys 0m26.000s good PE2950 server (with the exact same hardware): [root@good ~]# time sh -c "dd if=/dev/zero of=/tmp/ddfile bs=8k count=200000 && sync" 200000+0 records in 200000+0 records out 1638400000 bytes (1.6 GB) copied, 3.19999 seconds, 512 MB/s real 0m7.694s user 0m0.053s sys 0m4.057s Hopefully you will have an idea what can cause the problem.

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• A separate user for each task?

  - by Mark Tomlin

  I just got a VPS sver the other day, I'm new to server administration, but not that new to Ubuntu (11.04). I use it in my living room as the HTPC, and I had a previous VPS that I used on and off for a team speak server. This one I'm setting up for long term use. So I would like to know the best practice when it comes to websites and tasks that I have the server proforming. I understand that it could be beneficial to separate each website into it's own usergroup or under its own username. I would setup nginx so that it could read all of the users directors (and thus each website) but could not touch anything else. The same with the TeamSpeak, should I make a user for TeamSpeak so that it operates within its own confined area or is this overkill? I do have access to root on the sever and my current plan is to run about 4 websites and a TeamSpeak server. My stack is Linux (Ubuntu 11.04 LTS), nginx, and PHP 5.4.3 (using the PDO SQLite 3 built in driver for the database). Should PHP have it's own user group or is it ok to place it in with nginx?

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• How to copy file preserving directory path in Linux?

  - by gasan

  I have Eclipse projects and ".project" file in them, the directory structure looks like 'myProject/.project'. I want to copy these '.project' files to another directory, but I want the enclosing directory name to be preserved. Let's say I have 'a/myProject/.project', I want to copy 'myProject/.project' to 'b', so it be 'b/myProject/.project', but 'b/myProject' doesn't exist. When I try in a: cp -r ./myProject/.project ../b it copies only '.project' file itself, without 'myProject' directory. Please advise.

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• How to install gnome desktop from dvd on Centos 6 using command line?

  - by alwbtc

  I have installed Centos 6 to Virtualbox. Although I have chosen to install General Purpose Gnome Desktop, Gnome desktop does not start. All I get is a black and white text prompt. I would like to know how I can install Gnome Desktop from Centos dvd iso image? How do I mount the dvd image to virtual machine linux? How do I install Gnome desktop from command line? If I already have Gnome Desktop installed, why doesn't it start? How can I check from command line that I have Gnome installled? This virtual machine does not have internet connection, that's why I want to install the Gnome Desktop from dvd. Best Regards

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• SSH asking for password for one user and not another

  - by Ocasta Eshu

  I have two users on the same machine and am attempting to set up SSH for user#2. SSH was still asking for a password for the second user so I copied the .rsa file from user#1 to user#2. although they have identical files and permissions and although no password is asked of user#1, SSH still asks for a password from user#2. What could cause two users on the same machine with identical .rsa files to have different responses from SSH?

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• The System Event Notification Service service terminated with the following error: Overlapped I/O operation is in progress

  - by user38923

  When I start my Windows 7, I get a notification The system event notification service could not be started.... As a result, I dont have Aero, even though my Windows Experience Index is 3.2. Aero used to work fine before today and I have not installed any new application. I have checked the event log and it reads: The System Event Notification Service service terminated with the following error: Overlapped I/O operation is in progress. I am not sure what this means. I have seen the services.msc and everything is fine there. Moreover the startup time has also extended and the Please wait stays for more than a minute. This is a sudden problem as everything used to work fine until today. For Aero I have tried starting Desktop Window manager (as pointed out by the trouble shooter), but with avail. From what I could understand from the forums, the lack of Aero and increased start-up time comes from a single problem of the System Event Notification Service. This is a personal Computer and I have no active directories installed.

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• How can I store Rails uploads on a remote server (and not a common cloud host)?

  - by joshee

  I would like to store uploads from a Rails application on a different server than my application server. I want to keep costs to a minimum and host this other server in-house. I am planning to use Carrierwave for uploads. It seems Carrierwave interfaces with Fog for remote hosts. Is there a way I could set the other server to act as a Fog provider? How would I go about this setup? Or, is there some better and easier way to go about all this?

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• CoreStore Encryption Error on Mac Lion

  - by Michael

  I am trying to encrypt an external drive using diskutil CoreStorage on Mac Lion 10.7.4. I thought the only requirements were that the drive have GUID partition scheme and Journaled HFS+ file system. I think my drive is configured accordingly but when I type the following command I get an error message back: Michaels-MacBook-Pro:~ Michael$ diskutil cs convert disk2 -passphrase TestPassword Error converting disk to CoreStorage: The given file system is not supported on Core Storage (-69756) Here are the details reported for the drive in question: Michaels-MacBook-Pro:~ Michael$ diskutil list disk2 /dev/disk2 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *500.1 GB disk2 1: EFI 209.7 MB disk2s1 2: Apple_HFS Test1 499.8 GB disk2s2 Michaels-MacBook-Pro:~ Michael$ diskutil list disk2 /dev/disk2 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *500.1 GB disk2 1: EFI 209.7 MB disk2s1 2: Apple_HFS Test1 499.8 GB disk2s2 Michaels-MacBook-Pro:~ Michael$ diskutil info disk2s2 Device Identifier: disk2s2 Device Node: /dev/disk2s2 Part of Whole: disk2 Device / Media Name: Test1 Volume Name: Test1 Escaped with Unicode: Test1 Mounted: Yes Mount Point: /Volumes/Test1 Escaped with Unicode: /Volumes/Test1 File System Personality: Journaled HFS+ Type (Bundle): hfs Name (User Visible): Mac OS Extended (Journaled) Journal: Journal size 40960 KB at offset 0xe8e000 Owners: Disabled Partition Type: Apple_HFS OS Can Be Installed: Yes Media Type: Generic Protocol: FireWire SMART Status: Not Supported Volume UUID: 1024D0B8-1C45-3057-B040-AE5C3841DABF Total Size: 499.8 GB (499763888128 Bytes) (exactly 976101344 512-Byte-Blocks) Volume Free Space: 499.3 GB (499315826688 Bytes) (exactly 975226224 512-Byte-Blocks) Device Block Size: 512 Bytes Read-Only Media: No Read-Only Volume: No Ejectable: Yes Whole: No Internal: No I'm a little concerned that the "Partition Type: Apple_HFS" entry is causing the problem, but I don't know how to change that. I only seem to be able to control the "File System Personality: Journaled HFS+" in Disk Utility. Can anyone shed some light on this for me?

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• New SSD freezing on older motherboard (intel G31)

  - by DJM

  I have an ECS G31T-M motherboard running a Core2 Quad processor, 4gb RAM, Windows 7 32bit, Geforce 9600GT. Bought a Sandisk Extreme III 120GB (SDSSDX-120G-G25) and installed today. I'm outputting this from my 9600GT with included TV-out adapter to Component video (to my HDTV). This motherboard is SATA 2 and from what I can tell, SSDs run on the IDE controller and there is nothing fancy to set up advanced features of SSDs. I've noticed on other forums (but not verifying with ECS) this board does not support AHCI. I have two versions of Windows 7 installed on two drives, the SSD and an old 500G disc drive. When booted from my older 500G HDD, video plays fine on the HDTV. When booting the SSD windows 7 install, I am freezing constantly, as in, video plays OK for a minute, then picture freezes for 1-3 minutes (sometimes as audio continues playing) and returns for 20-30 seconds before doing the same thing again. Other tasks such as basic maneuvering through file folders seems to be no problem. Please help!! Do I need a new system for this thing to work, or could there be other fixes? I updated firmware to R201 to no avail. DJM

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• How can I stream audio signals from various devices/computers to my home server?

  - by Breakthrough

  I currently have a headless home server set up (running Ubuntu 12.04 server edition) running a simple Apache HTTP server. The server is near an audio receiver, which controls a set of indoor and outdoor speakers in my home. Recently, my father purchased a Bluetooth adapter, which our various laptops and cellphones can connect to, outputting the music to the speakers. I was hoping to find a solution that worked over Wi-Fi, namely because it won't cost anything (I already have a server with an audio card), and it doesn't depend on Bluetooth. Is there any cross-platform (preferably free and open-source) solution that I can use which will allow me to stream audio to my home server, over my home network, from a wide variety of devices (laptops running Windows/Linux or cellphones running Android/BB/iOS)? I need something that works at least with Windows and Android. Also, just to clairfy, I want something that simply allows devices to connect to my server and output an audio signal without any action on the server end (since it's a server hidden away near my receiver). Any subsequent connection attempt should be dropped, so only one device can be in control of the stereo at once.

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• Windows 8 Start Screen very slow after Guest Additions

  - by Renan

  I installed Windows 8 Release Preview on a VirtualBox VM, and it worked correctly. Then I installed the Guest Additions to get the correct resolutions. Now, the Start screen is very slow, takes a long time to scroll and doesn't respond well to clicks. I believe it's not my host, as it's a good machine (i7 CPU, 6 GB of RAM) and this specifically starts to happen after installing the Guest Additions. The task manager doesn't show anything wrong (i.e. no processes pegging the CPU). Any suggestions?

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• How do I fill in data using index, match, etc. in MS Excel?

  - by MorningHacker

  I have data formatted like so. 1, 2, 3, 4, null, null, null A, B, C, D, null, null, null 1, null, null, 4, 5, 6, 7 A, null, null, D, 8, 9, 10 I want to copy the data from row three into the missing "null" cells in row one, because there is a match on cell values one and four upon comparing row one and row three. So far I have the following. =INDEX(A2:AE346, MATCH(A351&F351&G351, A2:A346&F2:F346&G2:G346, 0), 2) Here is a spreadsheet with some sample data so you can test your formulas.

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• BOOTMGR is compressed

  - by JavaAndCSharp

  So I've just finished messing up my computer beyond repair. I originally had a Windows 7 install on my 64GB SSD and all my data on my 1.5TB HDD. So I decided to install Windows 8 Consumer Preview. I tried to clone my 64GB SSD onto my HDD; but that didn't work either at first. I later learned that it wiped all my data off of it. Thank goodness for the cloud. So I retried the cloning after I realized that my data was gone, and I finished it. So I rebooted and got a cryptic error message: BOOTMGR is compressed. Press Ctrl+Alt+Del to restart. So I did. Several times. I followed the instructions to rebuild the bootmanager from many websites, including HowToGeek, smallvoid.com, and more. None worked. BTW, I've lost my Windows 7 Professional DVDs. All I have is my Windows 7 Home Premium DVD. It's the one I got with my laptop. How can I get back to a working computer? I'm willing to wipe anything, as my data is all in the cloud.

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