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• wifi hardware switch doesn't work on a Dell 1018

  - by user42566

  I have a problem with my Dell 1018 Inspiron. I can't switch the wifi on, through the key on the keyboard. I think it's a driver problem since Ubuntu 11.10. This are the versions i tried: Ubuntu 10.04 / 10.10 It's possible to install the driver by hand: sudo add-apt-repository ppa:lexical/hwe-wireless sudo apt-get update sudo apt-get install rtl8192ce-dkms Ubuntu 11.04 It works out of the box Ubuntu 11.10 / 12.04 I haven’t found any solution for these versions. The "ppa:lexical/hwe-wireless" doesn't work for these versions. It says Can not find package rtl8192ce-dkms. The window of additional drivers is empty. So I can't install the driver. The wired network works good. Here is some information: 0: dell-wifi: Wireless LAN Soft blocked: no Hard blocked: no 1: phy0: Wireless LAN Soft blocked: no Hard blocked: yes sudo lshw -class network *-network description: Ethernet interface product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:05:00.0 logical name: eth0 version: 05 serial: 5c:26:0a:0d:20:10 size: 10Mbit/s capacity: 100Mbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl_nic/rtl8105e-1.fw latency=0 link=no multicast=yes port=MII speed=10Mbit/s resources: irq:43 ioport:2000(size=256) memory:f0f2c000-f0f2cfff memory:f0f18000-f0f1bfff *-network description: Wireless interface product: RTL8188CE 802.11b/g/n WiFi Adapter vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:07:00.0 logical name: wlan0 version: 01 serial: 70:f1:a1:fe:15:bd width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=rtl8192ce driverversion=3.2.0-22-generic-pae firmware=N/A ip=192.168.1.76 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn resources: irq:17 ioport:3000(size=256) memory:f0100000-f0103fff mark@mark-Inspiron-1018:~$ mark@mark-Inspiron-1018:~$ sudo lspci -nn 00:00.0 Host bridge [0600]: Intel Corporation N10 Family DMI Bridge [8086:a010] 00:02.0 VGA compatible controller [0300]: Intel Corporation N10 Family Integrated Graphics Controller [8086:a011] 00:02.1 Display controller [0380]: Intel Corporation N10 Family Integrated Graphics Controller [8086:a012] 00:1b.0 Audio device [0403]: Intel Corporation N10/ICH 7 Family High Definition Audio Controller [8086:27d8] (rev 02) 00:1c.0 PCI bridge [0604]: Intel Corporation N10/ICH 7 Family PCI Express Port 1 [8086:27d0] (rev 02) 00:1c.1 PCI bridge [0604]: Intel Corporation N10/ICH 7 Family PCI Express Port 2 [8086:27d2] (rev 02) 00:1d.0 USB controller [0c03]: Intel Corporation N10/ICH 7 Family USB UHCI Controller #1 [8086:27c8] (rev 02) 00:1d.1 USB controller [0c03]: Intel Corporation N10/ICH 7 Family USB UHCI Controller #2 [8086:27c9] (rev 02) 00:1d.2 USB controller [0c03]: Intel Corporation N10/ICH 7 Family USB UHCI Controller #3 [8086:27ca] (rev 02) 00:1d.3 USB controller [0c03]: Intel Corporation N10/ICH 7 Family USB UHCI Controller #4 [8086:27cb] (rev 02) 00:1d.7 USB controller [0c03]: Intel Corporation N10/ICH 7 Family USB2 EHCI Controller [8086:27cc] (rev 02) 00:1e.0 PCI bridge [0604]: Intel Corporation 82801 Mobile PCI Bridge [8086:2448] (rev e2) 00:1f.0 ISA bridge [0601]: Intel Corporation NM10 Family LPC Controller [8086:27bc] (rev 02) 00:1f.2 SATA controller [0106]: Intel Corporation N10/ICH7 Family SATA Controller [AHCI mode] [8086:27c1] (rev 02) 00:1f.3 SMBus [0c05]: Intel Corporation N10/ICH 7 Family SMBus Controller [8086:27da] (rev 02) 05:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller [10ec:8136] (rev 05) 07:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter [10ec:8176] (rev 01) mark@mark-Inspiron-1018:~$ mark@mark-Inspiron-1018:~$ lsusb Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 002: ID 174f:1127 Syntek mark@mark-Inspiron-1018:~$

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• Changing the Operating System with only Ubuntu installed

  - by Games Brainiac

  I really wanted to dive into the world of Open Source operating systems, so I downloaded the latest version of Ubuntu (13.10), and installed it on a clean(no operating system installed, absolutely nothing) Lenovo ThinkPad machine. After a few days, I wanted to try out a different Operating System (Elementary OS). I downloaded the ISO file, burned it to a USB, tested that the USB booted from a different computer (I have 2, one is the Lenovo, the other a HP). I was able to get the bootscreen, and everything worked like a charm after I set the BIOS to boot from USB Disk Drive instead of HD. After this, I went back to Lenovo, and tried to open up the boot menu, by pressing F12, so that I could load from a temporary device. To my surprise, nothing but the HD was listed. There was no Optical Drive, No USB Drive, absolutely nothing. So, I thought that these devices were probably disabled. So I went into my BIOS and checked to see what was the case. I saw that all my devices were enabled. USB and all the other devices such as network cable and the rest were all enabled. So, I thought this probably had something to do wit UEFI and Legacy Boot options. So, I made sure that both were enabled. This did not solve the problem either. Again, I got nothing but the option to boot from my Hard Disk. I thought the USB had to be at fault. I tried different ports, but to no avail. Next, I tried with a Live CD, which had Ubuntu on it. This failed too. I simply could not boot from anything other than my hard disk. Okay, so at this point, I was pretty desperate, so I installed Boot-Repair through: sudo add-apt-repository ppa:yannubuntu/boot-repair sudo apt-get update sudo apt-get install boot-repair What this did is lead me to GRUB. Ideally, its just a screen that gives me the option to load from Ubuntu or Advanced Settings. The Advanced settings had nothing but Ubuntu options in it. So, I kept on pressing ESC and that led me to the the grub console, and thats where I am right now with my Lenovo. I've also tried updating the BIOS, but Lenovo only has packages for Red Hat and Windows. So, a dead end there too. Right now, I need to know if there is any way that I can just delete everything from my Lenovo? I want to revert it back to its blank factory condition. How can I achieve this? I have tried to elaborate my problem as best I could. If there is any important information that I've missed out, please do not hesitate to leave a comment. I would have included some screen shots, but BIOS screen shots are a little hard to manage. However, I can provide a camera Image of the boot screen if needed (doing that as we speak).

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• Using dd-wrt Dynamic DNS client with CloudFlare

  - by Roman

  I'm trying to configure Dynamic DNS client on my router with dd-wrt (v24-sp2) firmware so it would dynamically change IP address in one of the DNS records. Unfortunately I encountered a problem… Here is an example request from their ddclient configuration: https://www.cloudflare.com/api.html?a=DIUP&u=<my_login>&tkn=<my_token>&ip=<my_ip>&hosts=<my_record> It works if I use it in browser, but in dd-wrt I get this output: Tue Jan 24 00:36:47 2012: INADYN: Started 'INADYN Advanced version 1.96-ADV' - dynamic DNS updater. Tue Jan 24 00:36:47 2012: I:INADYN: IP address for alias '<my_record>' needs update to '<my_ip>' Tue Jan 24 00:36:48 2012: W:INADYN: Error validating DYNDNS svr answer. Check usr,pass,hostname! (HTTP/1.1 303 See Other Server: cloudflare-nginx Date: Mon, 23 Jan 2012 14:36:48 GMT Content-Type: text/plain Connection: close Expires: Sun, 25 Jan 1981 05:00:00 GMT Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0 Pragma: no-cache Location: https://www.cloudflare.com/api.html?a=DIUP&u=<my_login>&tkn=<my_token>&ip=<my_ip>&hosts=<my_record> Vary: Accept-Encoding Set-Cookie: __cfduid=<id>; expires=Mon, 23-Dec-2019 23:50:00 GMT; path=/; domain=.cloudflare.com Set-Cookie: __cfduid=<id>; expires=Mon, 23-Dec-2019 23:50:00 GMT; path=/; domain=.www.cloudflare.com You must include an `a' paramiter, with a value of DIUP|wl|chl|nul|ban|comm_news|devmode|sec_lvl|ipv46|ob|cache_lvl|fpurge_ts|async|pre_purge|minify|stats|direct|zone_check|zone_ips|zone_errors|zone_agg|zone_search|zone_time|zone_grab|app|rec_se URL from "Location" works perfectly and parameter "a" is included. What's the problem?

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• Smart Array P400 - Accelerator Replacement Battery Failure

  - by inflammable

  TL;DR - Is the immediate failure of a replacement battery, for a failed battery, on a battery backed accelerator for a Smart Array P400 controller a common occurrence? Or are we likely to have an storage controller with an impending and critical fault? We have a slightly confusing situation with a Smart Array P400 storage controller with the 512mb battery backed accelerator addon on an HP DL380 server. The storage controller is (afaik) running the latest firmware and driver: Model: Smart Array P400 Controller Status: OK Firmware Version: 7.24 Serial Number: *snip* Rebuild Priority: Medium Expand Priority: Medium Number Of Ports: 2 The storage diagnostic (both on the both boot-up screen for the controller and within the 'Management Homepage' and the 'HP Array Diagnostic Utility') recently starting showing the following status a fault for the battery for the accelerator: Accelerator Status: Temporarily Disabled Error Code: Cache Disabled Low Batteries Serial Number: *snip* Total Memory: 524288 KB Read Cache: 25% Write Cache: 75% Battery Status: Failed Read Errors: 0 Write Errors: 0 We replaced the battery with a new unit (a visual inspection of the P400 card showing nothing unusual) and saw the same fault - but expected this to disappear over the course of a few hours/days as it charged. This didn't happy, and the fault status remains the same as above. Given the battery is a genuine part from HP, I wouldn't have expected a replacement battery to fail straight away, or to be dead-on-arrival (is that naivety on my part?). Is the immediate failure of a replacement battery, for a failed battery, on a battery backed accelerator a common occurrence? Or are we likely to have an storage controller with an impending and critical fault? Is there any diagnostic that could tell me more about the failed battery, without cracking the server open again? Many thanks!

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• flask, lighttpd with fastcgi can't get it to work

  - by kurojishi

  i'm tring to deploy a simple flask script to a lighttpd server with fastcgi. this is the configuration file for lighttpd builded using the flask documentation http://flask.pocoo.org/docs/deploying/fastcgi/#configuring-lighttpd server.modules = ( "mod_access", "mod_alias", "mod_compress", "mod_redirect", "mod_rewrite", "mod_fastcgi", ) server.document-root = "/var/www" server.upload-dirs = ( "/var/cache/lighttpd/uploads" ) server.errorlog = "/var/log/lighttpd/error.log" server.pid-file = "/var/run/lighttpd.pid" server.username = "www-data" server.groupname = "www-data" index-file.names = ( "index.php", "index.html", "index.htm", "default.htm", " index.lighttpd.html" ) url.access-deny = ( "~", ".inc" ) static-file.exclude-extensions = ( ".php", ".pl", ".fcgi" ) var.home_dir = "/var/lib/lighttpd" var.socket_dir = home_dir + "sockets/" ## Use ipv6 if available #include_shell "/usr/share/lighttpd/use-ipv6.pl" dir-listing.encoding = "utf-8" server.dir-listing = "enable" compress.cache-dir = "/var/cache/lighttpd/compress/" compress.filetype = ( "application/x-javascript", "text/css", "text/html", "text/plain" ) include_shell "/usr/share/lighttpd/create-mime.assign.pl" include_shell "/usr/share/lighttpd/include-conf-enabled.pl" fastcgi.server = ("weibo/callback.fcgi" => (( "socket" => "/tmp/weibocrawler-fcgi.sock", "bin-path" => "/var/www/weibo/callback.fcgi", "check-local" => "disable", "max-procs" => 1 )) ) url.rewrite-once = ( "^(/weibo($|/.*))$" => "$1", "^(/.*)$" => "weibo/callback.fcgi$1" and this is the script i'm tring to run: #!/home/nrl/kuro/weiboenv/bin/python from flup.server.fcgi import WSGIServer from callback import app if __name__ == '__main__': WSGIServer(application, bindAddress='/tmp/weibocrawler-fcgi.sock').run() but i have this error testing the configuration file i get this error: 2013-07-02 17:15:42: (configfile.c.912) source: lighttpd.conf.new line: 52 pos: 1 parser failed somehow near here: weibo/callback.fcgi$1 when i remove the urlrewrite i get these errors in the log even if the daemon start: 2013-07-02 16:25:53: (log.c.166) server started 2013-07-02 16:25:53: (mod_fastcgi.c.1104) the fastcgi-backend fcgi.py failed to start: 2013-07-02 16:25:53: (mod_fastcgi.c.1108) child exited with status 2 fcgi.py 2013-07-02 16:25:53: (mod_fastcgi.c.1111) If you're trying to run your app as a FastCGI backend, make sure you're using the FastCGI-enabled version. If this is PHP on Gentoo, add 'fastcgi' to the USE flags. 2013-07-02 16:25:53: (mod_fastcgi.c.1399) [ERROR]: spawning fcgi failed. 2013-07-02 16:25:53: (server.c.938) Configuration of plugins failed. Going down.

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• Have set Expiration time: Still getting "Query string present but no explicit expiration time"

  - by oligofren

  I have one local Apache instance running with mod_cache (+ disk & mem) enabled, and it seems to cache content from my appserver fine. My app server sets Expiration headers and Last-modified. Yet, when deploying on a production server with the same modules enabled, I am getting the following error in my logs: blablabla not cached. Reason: Query string present but no explicit expiration time Any clues on why Apache is not caching content? The only difference is the Apache version. Locally I am running 2.2. This is from my config CacheRoot "/var/cache/apache2/" CacheEnable disk / This is example output < HTTP/1.1 200 OK < Date: Mon, 19 Nov 2012 16:09:13 GMT < Server: Sun GlassFish Enterprise Server v2.1.1 < X-Powered-By: Servlet/2.5 < Expires: Tue Nov 20 05:00:00 CET 2012 < Last-Modified: Mon Nov 19 17:09:13 CET 2012 < Cache-Control: no-transform < Content-Type: application/x-javascript < Transfer-Encoding: chunked

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• How does a web server/the http protocol handle version control and compression?

  - by Sune Rasmussen

  When a client browser requests a file from the web server, I know that some kind of check is performed, because the files needed to serve the web page may already be cached by the web browser. So, if a file exists in the cache, no files are sent. But if the file on the server has changed since the file was cached in the browser, the file is sent and updated anyhow. Then, if you have compression like gzipping enabled on the server, the files that are to be provided to the client must be gzipped on the way, requiring some amount of server side processing. But how is this managed? The logical approach seems to me, that the web server should have a cache as well, containing the newest version of all files that have been requested within a certain time span, thus a compressed version of these files, so that compression would not have to be done each time a files is requested. And also, how are files eventually requested? Does the browser ask for files, each time it encounters one in the HTML code and the specific file is not stored in the local cache, or does it sum all the files that are needed up and ask for the whole bunch at the same time? But that's only guessing from a programming point of view, and I don't really know. If the answers are very different among web server systems, I'm primarily interested in Apache, but other answers are appreciated, too.

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• Ubuntu virtual memory caches suck up memory

  - by Tom

  Hey all, I've got an Ubuntu 9.10 64-bit server that seems to use up all available memory. According to my munin graphs, almost all of the memory used up is in the swap cache, cache, and slab cache. (I take this to mean virtual memory caches, am I right in assuming this?) Once memory usage approaches 100%, some (although not all) system services such as SSH become sluggish and unresponsive. After rebooting the system, performance and memory usage become normal for a time. Some interesting tidbits: The system runs Apache 2, MySQL, Munin, and sshd. The memory usage spikes happen at the same time every night (at 10 PM sharp.) There appears to be nothing in the crontab for any of the users, and nothing in /etc/cron.d/* out of the ordinary, let alone something that would occur at 10 PM. My question is, how do I figure out what is causing the memory suckage? I've tried the usual utilities (e.g. ps, top, etc) but I can't seem to find anything unusual. Any ideas? Thanks in advance!

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• on debian, lighttpd apache2 using 80 port, lighttpd throws :address already use error

  - by user1960581

  I bought the linode(linode.com) server the other day. I've been trying to run lighttpd and apache2 at the same port, using lighttpd for static files. As linode is only providing ONE ipv4 address, I tried to bind lighttpd on the ipv6 address. That's where I got the same error each and very single time: can't bind to port [ipv6] 80 Address already in use. I tried bind the ipv4 address. Everything worked. Please help me, this is driving me nuts for the last two days. my lighttpd.conf file:(the ipv6 address isn't true) server.modules = ( "mod_access", "mod_alias", "mod_compress", "mod_redirect", # "mod_rewrite", ) server.document-root = "/var/www" server.upload-dirs = ( "/var/cache/lighttpd/uploads" ) server.errorlog = "/var/log/lighttpd/error.log" server.pid-file = "/var/run/lighttpd.pid" server.username = "www-data" server.groupname = "www-data" server.port = 80 server.bind = "2600:3c02::0000" server.use-ipv6 = "enable" #server.pid-file = "/var/run/lighttpd.pid" index-file.names = ( "index.php", "index.html", "index.lighttpd.html" ) url.access-deny = ( "~", ".inc" ) static-file.exclude-extensions = ( ".php", ".pl", ".fcgi" ) compress.cache-dir = "/var/cache/lighttpd/compress/" compress.filetype = ( "application/javascript", "text/css", "text/html", "text/plain" ) # default listening port for IPv6 falls back to the IPv4 port #include_shell "/usr/share/lighttpd/use-ipv6.pl " + server.port include_shell "/usr/share/lighttpd/create-mime.assign.pl" include_shell "/usr/share/lighttpd/include-conf-enabled.pl" ### ipv6 ### $SERVER["socket"] == "[2600:3c02::0000]:80" { # accesslog.filename = "var/log/lighttpd/ipv6/access.log" # server.document-root = "/var/www/" # server.error-handler-404 = "/index.php?error=404" } and the error message: can't bind to port, 2600:3c02::0000 Address already in use.

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• Apache reverse proxy: no protocol handler

  - by gonvaled

  I am trying to configure a reverse proxy with apache, but I am getting a No protocol handler was valid for the URL error, which I do not understand. This is the relevant configuration of apache: ProxyRequests Off ProxyPreserveHost On <Proxy *> Order deny,allow Allow from all </Proxy> ProxyPass /gonvaled/examples/jsonrpc/output/services/ http://localhost:8000/services/ ProxyPassReverse /gonvaled/examples/jsonrpc/output/services/ http://localhost:8000/services/ The requests is reaching apache as: POST /gonvaled/examples/jsonrpc/output/services/EchoService.py HTTP/1.1 And they should be forwarded to my internal service, located at: 0.0.0.0:8000/services/EchoService.py These are the logs: ==> /var/log/apache2/error.log <== [Wed Jun 20 02:05:20 2012] [debug] proxy_util.c(1506): [client 127.0.0.1] proxy: http: found worker http://localhost:8000/services/ for http://localhost:8000/services/EchoService.py, referer: http://localhost/gonvaled/examples/jsonrpc/output/JSONRPCExample.safari.cache.html [Wed Jun 20 02:05:20 2012] [debug] mod_proxy.c(998): Running scheme http handler (attempt 0) [Wed Jun 20 02:05:20 2012] [warn] proxy: No protocol handler was valid for the URL /gonvaled/examples/jsonrpc/output/services/EchoService.py. If you are using a DSO version of mod_proxy, make sure the proxy submodules are included in the configuration using LoadModule. [Wed Jun 20 02:05:20 2012] [debug] mod_deflate.c(615): [client 127.0.0.1] Zlib: Compressed 614 to 373 : URL /gonvaled/examples/jsonrpc/output/services/EchoService.py, referer: http://localhost/gonvaled/examples/jsonrpc/output/JSONRPCExample.safari.cache.html ==> /var/log/apache2/access.log <== 127.0.0.1 - - [20/Jun/2012:02:05:20 +0200] "POST /gonvaled/examples/jsonrpc/output/services/EchoService.py HTTP/1.1" 500 598 "http://localhost/gonvaled/examples/jsonrpc/output/JSONRPCExample.safari.cache.html" "Mozilla/5.0 (X11; Linux i686) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.162 Safari/535.19"

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• Installing Linux on an Asus p8z68-m PRO Motherboard

  - by Holland

  Here is a challenge: how is this done? I've tried disabling the ASM1061 controller in the Onboard Devices section, using Wubi, booting from USB (as I don't have a DVD drive, yet), and even booting from RAID/IDE (with AHCI as the default) to do this. Still, no dice. Google shows up virtually nothing related about Linux and this mobo, apart from a people just saying "disable ASMedia" (which, I assume is the ASM1061 controller, as that's all I see - apart from the USB 3.0, which I disabled already) and it hasn't really helped much. Thus, what is wrong here? Edit My problem is that I cannot boot Linux via USB or a simple Windows installer such as Wubi (for Ubuntu). I wind up getting error messages along the lines of write cache failed, along with many other cryptic error messages similar to the following: [ 1400.351374] sd 4:0:0:0: [sdb] Test WP failed, assume Write Enabled [ 1400.353433] sd 4:0:0:0: [sdb] Asking for cache data failed [ 1400.356601] sd 4:0:0:0: [sdb] Assuming drive cache: write through This seems to be common for Asus P8Z68-M Pro motherboards, with the only notable solution being to "disable ASMedia", which, as I said before, I'm guessing is the ASM1061 controller on the motherboard. Despite already disabling this, I have tried this with both Fedora and Ubuntu without any success. I need to know what I can do about this; has anyone ran into something similar or heard about this issue before? I know these motherboards are relatively new...

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• Why doesn't apache2 consistently load template fragments from memcached?

  - by Hobhouse

  I run a webserver on an ubuntu box in the rackspacecloud with django 1.0x, apache2/WSGI and memcached 1.2.2. Some of my templates make use of template fragment caching: {% load cache %} {% cache 604800 keyname %} <!-- cache: {% now "H:i, j. b" %} --> {{ my_content }} {% endcache %} When I reload apache2 everything is fine. If keyname is not set, my_content is generated and keyname is set in memcached. After that, my_content is served from memcached. My problem is that after some hours (notably less time than 604800 seconds ), apache2 seems to stop talking to memcached, and my_content is generated from scratch everytime. When this happens I can still set and get keys from memcached from my python shell. Memcached also has more than enough memory to store keys. But to get apache2 to start talking to memcached again I have to restart apache2, and then it will once again start to get the now several hours old keys from memcached. What can be the reason for this behaviour, and how do I fix it?

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• Can't mount FAT32 drive under Ubuntu Linux

  - by Josh

  I have a 320GB USB drive with a single large FAT32 partition. The volume mounts perfectly fine on my Mac OS X 10.5.8 machine and Disk Utility on the mac reports no issues with the volume. I can read/write all data on the drive. However when I connect the drive to my Ubuntu 9.10 Karmic system, the partition does not mount. dmesg|tail says: [ 2752.334822] scsi3 : SCSI emulation for USB Mass Storage devices [ 2752.335040] usb-storage: device found at 3 [ 2752.335044] usb-storage: waiting for device to settle before scanning [ 2757.330301] usb-storage: device scan complete [ 2757.331005] scsi 3:0:0:0: Direct-Access WD 3200AAK External 1.65 PQ: 0 ANSI: 0 [ 2757.331772] sd 3:0:0:0: Attached scsi generic sg2 type 0 [ 2757.355647] sd 3:0:0:0: [sdb] 625142448 512-byte logical blocks: (320 GB/298 GiB) [ 2757.360737] sd 3:0:0:0: [sdb] Write Protect is off [ 2757.360749] sd 3:0:0:0: [sdb] Mode Sense: 00 00 00 00 [ 2757.360755] sd 3:0:0:0: [sdb] Assuming drive cache: write through [ 2757.367618] sd 3:0:0:0: [sdb] Assuming drive cache: write through [ 2757.367631] sdb: sdb1 [ 2762.797622] sd 3:0:0:0: [sdb] Assuming drive cache: write through [ 2762.797636] sd 3:0:0:0: [sdb] Attached SCSI disk [ 2822.866228] FAT: bogus number of reserved sectors [ 2822.866237] VFS: Can't find a valid FAT filesystem on dev sdb1. When I run fsck.vfat -a /dev/sdb1 I get: root@cartman:~# fsck.vfat -a /dev/sdb1 dosfsck 3.0.3, 18 May 2009, FAT32, LFN Logical sector size is zero. Googling "vfat Logical sector size is zero" produced no consensus as to the solution. I would prefer not to have to completely reformat the disk if possible because it contains about 280GB of data I would rather not have to find a temporary home for. Any suggestions?

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• Extend RAID 1 (HP SmartArray P410i) running Linux

  - by Oliver

  I took over a fairly simple server setup with the following RAID 1 config running Ubuntu 11.10 (Kernel 3.0.0-12-server x86_64): => ctrl all show config Smart Array P410i in Slot 0 (Embedded) (sn: removed) array A (SAS, Unused Space: 1335535 MB) logicaldrive 1 (279.4 GB, RAID 1, OK) physicaldrive 1I:1:1 (port 1I:box 1:bay 1, SAS, 1 TB, OK) physicaldrive 1I:1:2 (port 1I:box 1:bay 2, SAS, 1 TB, OK) Initially there were two 300GB disks that got replaced by 1TB disks and I now have to extend the logical volume to use that extra space. However, when trying to do so I get the following warning: => ctrl slot=0 ld 1 modify size=max Warning: Extension may not be supported on certain operating systems. Performing extension on these operating systems can cause data to become inaccessible. See ACU documentation for details. Continue? (y/n) Is it safe to say yes or am I at risk of corrupting the file system / loosing data? Rearranging and extending the file system afterwards shouldn't be an issue as I can take the server offline and boot from a gparted live disk. Here's the config of the RAID controller in use: => ctrl all show detail Smart Array P410i in Slot 0 (Embedded) Bus Interface: PCI Slot: 0 Serial Number: removed RAID 6 (ADG) Status: Disabled Controller Status: OK Hardware Revision: Rev C Firmware Version: 5.12 Rebuild Priority: Medium Expand Priority: Medium Surface Scan Delay: 15 secs Surface Scan Mode: Idle Wait for Cache Room: Disabled Surface Analysis Inconsistency Notification: Disabled Post Prompt Timeout: 0 secs Cache Board Present: False Drive Write Cache: Disabled SATA NCQ Supported: True And the partition table: Number Start End Size Type File system Flags 1 1049kB 274GB 274GB primary ext4 boot 2 274GB 300GB 25.8GB extended 5 274GB 300GB 25.8GB logical linux-swap(v1)

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• performance wise htaccess

  - by purpler

  hese's the my htaccess template, i wonder if anything could be added to increase website performance.. # Defaults AddDefaultCharset UTF-8 DefaultLanguage en-US ServerSignature Off FileETag None Header unset ETag Options -MultiViews #Options All -Indexes # Force the latest IE version or ChromeFrame <IfModule mod_setenvif.c> <IfModule mod_headers.c> BrowserMatch MSIE ie Header set X-UA-Compatible "IE=Edge,chrome=1" env=ie </IfModule> </IfModule> # Proxy X-UA Setup <IfModule mod_headers.c> Header append Vary User-Agent </IfModule> #Rewrites Options +FollowSymlinks RewriteEngine On RewriteBase / # Redirect to non-WWW RewriteCond %{HTTPS} !=on RewriteCond %{HTTP_HOST} ^www\.(.+)$ [NC] RewriteRule ^(.*)$ http://%1/$1 [R=301,L] # Redirect to WWW RewriteCond %{HTTP_HOST} ^domain.com RewriteRule (.*) http://www.domain.com/$1 [R=301,L] # Redirect index to root RewriteRule ^(.*)index\.(php|html)$ /$1 [R=301,L] # Caching ExpiresActive On ExpiresDefault A0 Header set Cache-Control "public" # 1 Year Long Cache <FilesMatch "\.(flv|fla|ico|pdf|avi|mov|ppt|doc|mp3|wmv|wav|png|jpg|jpeg|gif|swf|js|css|ttf|eot|woff|svg|svgz)$"> ExpiresDefault A31622400 </FilesMatch> # Proxy Caching <FilesMatch "\.(css|js|png)$"> ExpiresDefault A31622400 Header set Cache-Control "private" </FilesMatch> # Protect against DOS attacks by limiting file upload size LimitRequestBody 10240000 # Proper SVG serving AddType image/svg+xml svg svgz AddEncoding gzip svgz # GZip Compression <IfModule mod_deflate.c> <FilesMatch "\.(php|html|css|js|xml|txt|ttf|otf|eot|svg)$" > SetOutputFilter DEFLATE </FilesMatch> </IfModule> # Error page ErrorDocument 404 /404.html # Deny access to sensitive files <FilesMatch "\.(htaccess|ini|log|psd)$"> Order Allow,Deny Deny from all </FilesMatch>

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• In spite of correct DNS, Exchange sending to wrong destination server for single outbound domain

  - by beporter

  My company uses an SBS 2003 server and makes use of Exchange to host our own email. We also have a linux server hosting domains for some of our clients. In order for us to send to those clients, we had internal DNS set up to shadow the client domains to provide "correct" MX records inside our network. For example, public DNS for a domain abc.com might point to 1.2.3.4, but internally we have MX records set up to route mail for abc.com to 172.16.0.4, which is the linux email server. This setup was entirely functional; this is just back story. We've recently moved one of our client domains from our internal linux server to an external email provider. When we did that, we naturally deleted our internal shadow DNS records so our Exchange server would fetch correct (public) DNS records and route mail out to the new external host. This has NOT had any effect on Exchange though. Even after rebooting the Exchange server and completely flushing the DNS cache (nslookups on the Exchange machine itself correctly resolve to the new external address) Exchange still attempts to deliver messages for the domain to our internal server! Exchange correctly routes to all other internal and external domains when sending email. Somehow Exchange is trying to deliver to a machine that by all accounts it has no business trying to use for just this one domain. Is there a DNS cache that Exchange uses internally? Is there a way to flush that internal cache? What else could I be missing?

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• preformance wise htaccess

  - by purpler

  hese's the my htaccess template, i wonder if anything could be added to increase website performance.. # Defaults AddDefaultCharset UTF-8 DefaultLanguage en-US ServerSignature Off FileETag None Header unset ETag Options -MultiViews #Options All -Indexes # Force the latest IE version or ChromeFrame <IfModule mod_setenvif.c> <IfModule mod_headers.c> BrowserMatch MSIE ie Header set X-UA-Compatible "IE=Edge,chrome=1" env=ie </IfModule> </IfModule> # Proxy X-UA Setup <IfModule mod_headers.c> Header append Vary User-Agent </IfModule> #Rewrites Options +FollowSymlinks RewriteEngine On RewriteBase / # Redirect to non-WWW RewriteCond %{HTTPS} !=on RewriteCond %{HTTP_HOST} ^www\.(.+)$ [NC] RewriteRule ^(.*)$ http://%1/$1 [R=301,L] # Redirect to WWW RewriteCond %{HTTP_HOST} ^domain.com RewriteRule (.*) http://www.domain.com/$1 [R=301,L] # Redirect index to root RewriteRule ^(.*)index\.(php|html)$ /$1 [R=301,L] # Caching ExpiresActive On ExpiresDefault A0 Header set Cache-Control "public" # 1 Year Long Cache <FilesMatch "\.(flv|fla|ico|pdf|avi|mov|ppt|doc|mp3|wmv|wav|png|jpg|jpeg|gif|swf|js|css|ttf|eot|woff|svg|svgz)$"> ExpiresDefault A31622400 </FilesMatch> # Proxy Caching <FilesMatch "\.(css|js|png)$"> ExpiresDefault A31622400 Header set Cache-Control "private" </FilesMatch> # Protect against DOS attacks by limiting file upload size LimitRequestBody 10240000 # Proper SVG serving AddType image/svg+xml svg svgz AddEncoding gzip svgz # GZip Compression <IfModule mod_deflate.c> <FilesMatch "\.(php|html|css|js|xml|txt|ttf|otf|eot|svg)$" > SetOutputFilter DEFLATE </FilesMatch> </IfModule> # Error page ErrorDocument 404 /404.html # Deny access to sensitive files <FilesMatch "\.(htaccess|ini|log|psd)$"> Order Allow,Deny Deny from all </FilesMatch>

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• ddclient to update namecheap subdomain?

  - by LF4

  I have a subdomain that I want to update with ddclient. I configured the ddclient to get the IP from dyndns but it's not updating the subdomain on namecheap. They said to use yourdomain.com as the login instead of my actual domain. Has anyone been able to get namecheap DNS updated with ddclient? I'm running CentOS 6.2 with ddclient 3.7.3. When I run ddclient I get the following. CONNECT: checkip.dyndns.org CONNECTED: using HTTP SENDING: GET / HTTP/1.0 SENDING: Host: checkip.dyndns.org SENDING: User-Agent: ddclient/3.7.3 SENDING: Connection: close SENDING: RECEIVE: HTTP/1.1 200 OK RECEIVE: Content-Type: text/html RECEIVE: Server: DynDNS-CheckIP/1.0 RECEIVE: Connection: close RECEIVE: Cache-Control: no-cache RECEIVE: Pragma: no-cache RECEIVE: Content-Length: 106 RECEIVE: RECEIVE: <html><head><title>Current IP Check</title></head><body>Current IP Address: IPADD</body></html> Use of uninitialized value in string ne at /usr/sbin/ddclient line 1998. WARNING: skipping update of lf4bot from <nothing> to IPADD WARNING: last updated <never> but last attempt on Fri Jun 15 22:46:21 2012 failed. WARNING: Wait at least 5 minutes between update attempts. ddclient.conf File daemon=300 # check every 300 seconds syslog=yes # log update msgs to syslog mail=root # mail all msgs to root mail-failure=root # mail failed update msgs to root pid=/var/run/ddclient.pid # record PID in file. ssl=yes # use ssl-support. Works with use=web, web=checkip.dyndns.org/, web-skip='IP Address' # found after IP Address protocol=namecheap \ server=dynamicdns.park-your-domain.com \ login=yourdomain.com \ password=PASSWORD \ lf4bot

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• Squid: The request or reply is too large

  - by Ueli

  I have done a reverse proxy with an Apache in the background (on the same server). All works great but I can't open one page. I get the error "The request or reply is too large." In my cache.log contains: 2010/12/09 15:28:29| WARNING: http.c:971: HTTP header too large 2010/12/09 15:29:03| ctx: enter level 0: 'http://server/admin/cms/nav' 2010/12/09 15:29:03| httpProcessReplyHeader: Too large reply header 2010/12/09 15:29:03| ctx: exit level 0 In my squid.conf i disabled the limitations of the request and reply header, without success: reply_body_max_size 0 allow all request_body_max_size 0 Does someone know why that don't work? Thank you very much. Squid Version: Squid Cache: Version 2.7.STABLE3 configure options: '--prefix=/usr' '--exec_prefix=/usr' '--bindir=/usr/sbin' '--sbindir=/usr/sbin' '--libexecdir=/usr/lib/squid' '--sysconfdir=/etc/squid' '--localstatedir=/var/spool/squid' '--datadir=/usr/share/squid' '--enable-async-io' '--with-pthreads' '--enable-storeio=ufs,aufs,coss,diskd,null' '--enable-linux-netfilter' '--enable-arp-acl' '--enable-epoll' '--enable-removal-policies=lru,heap' '--enable-snmp' '--enable-delay-pools' '--enable-htcp' '--enable-cache-digests' '--enable-underscores' '--enable-referer-log' '--enable-useragent-log' '--enable-auth=basic,digest,ntlm,negotiate' '--enable-negotiate-auth-helpers=squid_kerb_auth' '--enable-carp' '--enable-follow-x-forwarded-for' '--with-large-files' '--with-maxfd=65536' 'amd64-debian-linux' 'build_alias=amd64-debian-linux' 'host_alias=amd64-debian-linux' 'target_alias=amd64-debian-linux' 'CFLAGS=-Wall -g -O2' 'LDFLAGS=' 'CPPFLAGS='

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• HP DL185 - very slow disk read speed

  - by fistameeny

  Hi, I have a HP DL185 G6 Server (12 disk model) with the following spec: Quad Core Xeon 2.27GHz 6GB RAM HP P212 RAID controller with battery backup 2 x 128GB 15K SAS 3.5" (RAID-1 for the operating system) 4 x 750GB 7.5K SAS 3.5" (RAID-5 for the data, 2TB usable space) The operating system is Ubuntu Server 9.10. Both drives have been formatted as EXT4. We are finding that read speed of the RAID-5 array is poor. Disk test results below: sudo hdparm -tT /dev/cciss/c0d1p1 /dev/cciss/c0d1p1: Timing cached reads: 15284 MB in 2.00 seconds = 7650.18 MB/sec Timing buffered disk reads: 74 MB in 3.02 seconds = 24.53 MB/sec For info, the RAID-1 array performs as follows: sudo hdparm -tT /dev/cciss/c0d0p1 /dev/cciss/c0d0p1: Timing cached reads: 15652 MB in 2.00 seconds = 7834.26 MB/sec Timing buffered disk reads: 492 MB in 3.01 seconds = 163.46 MB/sec We thought this was because with no battery, read/write cache is disabled. We have bought and installed the battery backup and have used the HP bootable CD to change the cache settings to 50% read / 50% write and check cache is enabled on the drives and the controller. Is there something I'm missing?

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• memory tuning with rails/unicorn running on ubuntu

  - by user970193

  I am running unicorn on Ubuntu 11, Rails 3.0, and Ruby 1.8.7. It is an 8 core ec2 box, and I am running 15 workers. CPU never seems to get pinned, and I seem to be handling requests pretty nicely. My question concerns memory usage, and what concerns I should have with what I am seeing. (if any) Here is the scenario: Under constant load (about 15 reqs/sec coming in from nginx), over the course of an hour, each server in the 3 server cluster loses about 100MB / hour. This is a linear slope for about 6 hours, then it appears to level out, but still maybe appear to lose about 10MB/hour. If I drop my page caches using the linux command echo 1 /proc/sys/vm/drop_caches, the available free memory shoots back up to what it was when I started the unicorns, and the memory loss pattern begins again over the hours. Before: total used free shared buffers cached Mem: 7130244 5005376 2124868 0 113628 422856 -/+ buffers/cache: 4468892 2661352 Swap: 33554428 0 33554428 After: total used free shared buffers cached Mem: 7130244 4467144 2663100 0 228 11172 -/+ buffers/cache: 4455744 2674500 Swap: 33554428 0 33554428 My Ruby code does use memoizations and I'm assuming Ruby/Rails/Unicorn is keeping its own caches... what I'm wondering is should I be worried about this behaviour? FWIW, my Unicorn config: worker_processes 15 listen "#{CAPISTRANO_ROOT}/shared/pids/unicorn_socket", :backlog = 1024 listen 8080, :tcp_nopush = true timeout 180 pid "#{CAPISTRANO_ROOT}/shared/pids/unicorn.pid" GC.respond_to?(:copy_on_write_friendly=) and GC.copy_on_write_friendly = true before_fork do |server, worker| STDERR.puts "XXXXXXXXXXXXXXXXXXX BEFORE FORK" print_gemfile_location defined?(ActiveRecord::Base) and ActiveRecord::Base.connection.disconnect! defined?(Resque) and Resque.redis.client.disconnect old_pid = "#{CAPISTRANO_ROOT}/shared/pids/unicorn.pid.oldbin" if File.exists?(old_pid) && server.pid != old_pid begin Process.kill("QUIT", File.read(old_pid).to_i) rescue Errno::ENOENT, Errno::ESRCH # already killed end end File.open("#{CAPISTRANO_ROOT}/shared/pids/unicorn.pid.ok", "w"){|f| f.print($$.to_s)} end after_fork do |server, worker| defined?(ActiveRecord::Base) and ActiveRecord::Base.establish_connection defined?(Resque) and Resque.redis.client.connect end Is there a need to experiment enforcing more stringent garbage collection using OobGC (http://unicorn.bogomips.org/Unicorn/OobGC.html)? Or is this just normal behaviour, and when/as the system needs more memory, it will empty the caches by itself, without me manually running that cache command? Basically, is this normal, expected behaviour? tia

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• Why is MySQL table_cache full but never used

  - by Jeremy Clarke

  I have been using the tuning-primer.sh script to tune my my.cnf settings. I have most things working well but the part about TABLE CACHE makes no sense: TABLE CACHE Current table_cache value = 900 tables. You have a total of 0 tables You have 900 open tables. Current table_cache hit rate is 1% , while 100% of your table cache is in use. You should probably increase your table_cache When I do SHOW STATUS; I get the following table-related numbers: Open_tables = 900 Opened_tables = 0 It seems like something is going wrong. I have some extra memory I could use on increasing the table_cache size, but my sense is that the 900 tables already available aren't doing anything, and increasing it will just waste more energy. Why might this be happening? Are there other settings that could cause all my table_cache slots to be used even though there are no hits to them? I have 150 max connections and probably no more than 4 tables per join, FWIW. Here is the tuner script output for temp tables, which I've also been tuning: TEMP TABLES Current max_heap_table_size = 90 M Current tmp_table_size = 90 M Of 11032358 temp tables, 40% were created on disk Perhaps you should increase your tmp_table_size and/or max_heap_table_size to reduce the number of disk-based temporary tables. Note! BLOB and TEXT columns are not allow in memory tables. If you are using these columns raising these values might not impact your ratio of on disk temp tables.

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• What to look for in a switch with LAN/WAN verses an iSCSI SAN?

  - by Luke

  I'm setting up a VMWare ESXi 5 environment with 3 server nodes. Dell recommended 2x Force10 S60 switches shared (iSCSI SAN, LAN/WAN). The S60 switches are extremely powerful. They have 1.25 GB of buffer cache, < 9us latency. But they are very expensive (online price ~$15k per switch, actual quote a little less). I've been told that "by the book" you should at least have 2 internal switches for SAN, and 2 switches for LAN/WAN (each with a redundant). I know some of the pros and cons of each approach. What I'm wondering is, would it be more cost effective to disjoin the SAN from LAN with less expensive switches? The answer to this question highlights what I should be looking for in a switch for the SAN. What should I be looking for in a LAN/WAN switch, in comparison to the SAN? With the above linked question for the SAN: How is buffer latency measured? When you see 36 MB of buffer cache, is that shared or per port? So 36 MB would be 768kb or 36MB per port? With 3 to 6 servers how much buffer cache do you really need? What else should I be looking at? Our application will be heavily using HTML5 websockets (high number of persistent connections). The amount of data being sent is small; Data sent between client <- server isn't broadcasted (not a chat/IM service). We will be doing some database reporting too (csv export, sums, some joins). We are a small business and on a budget. We'd probably only be able to spend no more than $20k on switches total (2 or 4).

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• DNS resolve .com domain on local domain

  - by Joost Verdaasdonk

  I'm building a local 2008 R2 domain as a test case to be able to write a roadmap for the real new domain that needs to be created soon. What I would like to know if I'm able to make a record in DNS that will point the domain name: www.example.com and example.com to one of the servers in my network. I tried creating an a-record for it but that doesn't work. To be honest I'm not even sure if this is possible? So can I do this? That way I would be able to fully test all our services (and webb app) offline before I build the real domain and switch the DNS records at the provider. Some advice if possible and where to start is appreciated. The solution (Thanks Brent): Create new Forward lookup zone pointing to example.com Create empty A record pointing to IP of the webserver you are targeting If www is needed create A record with Name: www and IP of your webserver sub domains repeat the process but then with names for example: sub or www.sub (and ip your webserver) Be aware of the DNS Cache while you are in this process. Things can take time or do the following: Right click the server and choose clear cache in CMD: ipconfig /flushdns (to flush the client cache)

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• squid bypass for a domain

  - by krisdigitx

  i am using squid with adzap, it possible that squid/adzap does not cache for a particluar domain eg. cnn.com this is my squid.conf file # # Recommended minimum configuration: # acl manager proto cache_object acl localhost src 127.0.0.1/32 #acl localhost src ::1/128 acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 #acl to_localhost dst ::1/128 # Example rule allowing access from your local networks. # Adapt to list your (internal) IP networks from where browsing # should be allowed acl localnet src 192.168.1.0/24 acl localnet src 192.168.2.0/24 acl SSL_ports port 443 acl Safe_ports port 80 # http acl Safe_ports port 21 # ftp acl Safe_ports port 443 # https acl Safe_ports port 70 # gopher acl Safe_ports port 210 # wais acl Safe_ports port 1025-65535 # unregistered ports acl Safe_ports port 280 # http-mgmt acl Safe_ports port 488 # gss-http acl Safe_ports port 591 # filemaker acl Safe_ports port 777 # multiling http acl CONNECT method CONNECT # # Recommended minimum Access Permission configuration: # # Only allow cachemgr access from localhost http_access allow manager localhost http_access deny manager # Deny requests to certain unsafe ports http_access deny !Safe_ports # Deny CONNECT to other than secure SSL ports http_access deny CONNECT !SSL_ports # We strongly recommend the following be uncommented to protect innocent # web applications running on the proxy server who think the only # one who can access services on "localhost" is a local user #http_access deny to_localhost # # INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS # # Example rule allowing access from your local networks. # Adapt localnet in the ACL section to list your (internal) IP networks # from where browsing should be allowed http_access allow localnet http_access allow localhost # And finally deny all other access to this proxy http_access deny all # Squid normally listens to port 3128 http_port xxx.xxx.xxx.yyy:3128 transparent visible_hostname proxyserver.local # We recommend you to use at least the following line. hierarchy_stoplist cgi-bin ? # Uncomment and adjust the following to add a disk cache directory. cache_dir ufs /var/spool/squid 1024 16 256 # Leave coredumps in the first cache dir coredump_dir /var/spool/squid # Add any of your own refresh_pattern entries above these. refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 refresh_pattern . 0 20% 4320 access_log /var/log/squid/squid.log squid access_log syslog squid redirect_program /usr/local/adzap/scripts/wrapzap fixed using acl allow_domains dstdomain www.cnn.com always_direct allow allow_domains

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