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  • How can I unfreeze an SSD connected to a remote server?

    - by chmac
    I don't have physical access to the machine, so I can't unplug the drive. # hdparm -I /dev/sda | grep frozen frozen The advice I've read elsewhere is to hotplug the drive, pull the power / sata cables while the machine is running. Those are not possible in this situation as I don't have physical access. I've tried power cycling the machine through the host's control panel a few times, but that hasn't worked. Is there any way I can unfreeze (unfrozen?) the drive without physical access?

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  • Why would the 'show processlist' command speed up normally slow requests to my remote DB? (connected via VPN)

    - by Hakan B.
    I am running a local Django development server that connects to a remote MySQL server via a VPN (IPSec). Request times are awfully slow and I consistently see timeouts. Attempting to diagnose the problem, I logged in to the remote database and ran: show full processlist Immediately, the local server went from idle to working. The page had not yet completely loaded, but progress had been made (debug logs confirm this). When I ran 'show full processlist' several times more in succession, the request completed quickly. I can currently reproduce this - unless I run 'show full processlist' over and over on the remote server, my local request usually times out. Does anyone have any idea why this would happen? I'm running Django 1.3 and OS X 10.7. Note: I realize this may be entirely not be a question with a clear-cut answer and is probably my fault, but it is odd and reproducable, so I hope someone can at least point me the right direction. Thanks in advance.

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  • Cannot log on to a remote server using rdp from windows 7 machine when I am remotley connected to th

    - by Gary
    Bear withe me, here is my set up. I use my 27" iMac 3.06GHz Core 2 Duo 4GB Ram to connect to my work desktop running Windows 7. From there I can administer other remote servers. Here is the problem. Using the Remote Desktop Client on my Mac I can connect to my work machine no problem. But when I then use the work machine to open a remote desktop session with another Windows server (usually SBS 2003 but applies to all) I get the log in prompt, I enter the user name password ensure i'm connecting to the domain, but it wont log me in. The error message is the same, as though I had typed the wrong password (i know this is not the case). Does anyone have a solution? Thanks in advance. Gary

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  • Microphones not working on Apple macbook Air 1,1 (Early 2008) under Linux

    - by jj_p
    I'm running Linux on an mba. I can't make the microphones (neither external nor internal) work. I test using alsamixer and arecord -d 5 test-mic.waw together with aplay test-mic.waw It seems there is a problem with kernel trying to decipher Apple (intentionally) corrupted 'bios', in particular the mic pins are wrongly assigned. As far as we are concerned here, is there any difference between using EFI and BIOS-compatibility mode? (see https://wiki.archlinux.org/index.php/MacBook where they claim to have everything working out of the box on mba1,1) A nice proposal would be to compile the latest Linux kernel and run hda-jack-retask to find the right configuration (in the case of Realtek codec, the missing things I'm supposed to check are either some vendor-specific COEF verbs, EAPD or GPIO setup.), and then come up with a kernel patch to address the issue. Since I'm not that familiar with this last part of the story, can anyone help me through this process? Some useful data: The output from alsa script run as root http://www.alsa-project.org/db/?f=adae8ebee1007043fe83414ac4972319e02255fa The command hda-jack-sense-test -a (with external mic in) Pin 0x14 (Internal Speaker): present = No Pin 0x15 (Green HP Out): present = Yes Pin 0x16 (Not connected): present = No Pin 0x17 (Not connected): present = No Pin 0x18 (Not connected): present = No Pin 0x19 (Not connected): present = No Pin 0x1a (Not connected): present = No Pin 0x1b (Not connected): present = No Pin 0x1c (Not connected): present = No Pin 0x1d (Not connected): present = No Pin 0x1e (Not connected): present = No Pin 0x1f (Not connected): present = No Most likely the chip is Realtek ALC885 (compare also ALC889A) http://guide-images.ifixit.net/igi/bBTSqaeK5JpQ1AWe.large , although at the moment alsa reads it as ALC889A Takashi Iwai's tutorial https://www.kernel.org/doc/Documentation/sound/alsa/HD-Audio.txt Some people researched the original files from a running OS X installation on this same model (I think the relevant files are AppleHDA.kext/Contents/MacOS/AppleHDA AppleHDA.kext/Contents/PlugIns/AppleHDAHardwareConfigDriver.kext/Contents/Info.p????list AppleHDA.kext/Contents/Resources/layout12.xml.zlib AppleHDA.kext/Contents/Resources/Platforms.xml.zlib) http://www.insanelymac.com/forum/topic/220090-alc889a-pin-configuration/#entry1554954 Datasheet http://www.realtek.info/pdf/ALC885_1-1.pdf (from the same Realtek, one can also try to download Linux driver, but this is just taken from ALSA project, as stated in the readme file.) Compare with this Arch guy http://www.alsa-project.org/db/?f=3ca8243c0626844f0264a3faad0aa72018bc14f4 Here for the first time support to audio (except mics) for mba1,2 (which is morally the same as 1,1) is patched into the kernel http://www.alsa-project.org/pipermail/alsa-devel/2010-February/025511.html The same jack supposedly works both for HP and ext MIC, I think it's called TRRS, and it's the same as the one used e.g. for iphones This guy might have done a similar job, though to a more recent version and for sound globally, not just mics: http://blogs.aerys.in/jeanmarc-leroux/2013/09/15/fixing-2013-macbook-air-ubuntu-sound-issue/ (this is mirror to http://unix.stackexchange.com/questions/73044/microphones-not-working-on-apple-macbook-air-1-1-early-2008-under-linux )

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  • Is Apache 2.2.22 able to sustain 1.000 simultaneous connected clients?

    - by Fnux
    For an article in a news paper, I'm benchmarking 5 different web servers (Apache2, Cherokee, Lighttpd, Monkey and Nginx). The tests made consist of measuring the execution times as well as different parameters such as the number of request served per second, the amount of RAM, the CPU used, during a growing load of simultaneous clients (from 1 to 1.000 with a step of 10) each client sending 1.000.000 requets of a small fixed file, then of a medium fixed file, then a small dynamic content (hello.php) and finally a complex dynamic content (the computation of the reimbursment of a loan). All the web servers are able to sustain such a load (up to 1.000 clients) but Apache2 which always stops to respond when the test reach 450 to 500 simultaneous clients. My configuration is : CPU: AMD FX 8150 8 cores @ 4.2 GHz RAM: 32 Gb. SSD: 2 x Crucial 240 Gb SATA6 OS: Ubuntu 12.04.3 64 bit WS: Apache 2.2.22 My Apache2 configuration is as follows: /etc/apache2/apache2.conf LockFile ${APACHE_LOCK_DIR}/accept.lock PidFile ${APACHE_PID_FILE} Timeout 30 KeepAlive On MaxKeepAliveRequests 1000000 KeepAliveTimeout 2 ServerName "fnux.net" <IfModule mpm_prefork_module> StartServers 16 MinSpareServers 16 MaxSpareServers 16 ServerLimit 2048 MaxClients 1024 MaxRequestsPerChild 0 </IfModule> User ${APACHE_RUN_USER} Group ${APACHE_RUN_GROUP} AccessFileName .htaccess <Files ~ "^\.ht"> Order allow,deny Deny from all Satisfy all </Files> DefaultType None HostnameLookups Off ErrorLog ${APACHE_LOG_DIR}/error.log LogLevel emerg Include mods-enabled/*.load Include mods-enabled/*.conf Include httpd.conf Include ports.conf LogFormat "%v:%p %h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" vhost_combined LogFormat "%h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" combined LogFormat "%h %l %u %t \"%r\" %>s %O" common LogFormat "%{Referer}i -> %U" referer LogFormat "%{User-agent}i" agent Include conf.d/ Include sites-enabled/ /etc/apache2/ports.conf NameVirtualHost *:8180 Listen 8180 <IfModule mod_ssl.c> Listen 443 </IfModule> <IfModule mod_gnutls.c> Listen 443 </IfModule> /etc/apache2/mods-available <IfModule mod_fastcgi.c> AddHandler php5-fcgi .php Action php5-fcgi /cgi-bin/php5.external <Location "/cgi-bin/php5.external"> Order Deny,Allow Deny from All Allow from env=REDIRECT_STATUS </Location> </IfModule> /etc/apache2/sites-available/default <VirtualHost *:8180> ServerAdmin webmaster@localhost DocumentRoot /var/www/apache2 <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /var/www/> Options Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny allow from all </Directory> ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> AllowOverride None Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch Order allow,deny Allow from all </Directory> ErrorLog ${APACHE_LOG_DIR}/error.log LogLevel emerg ##### CustomLog ${APACHE_LOG_DIR}/access.log combined Alias /doc/ "/usr/share/doc/" <Directory "/usr/share/doc/"> Options Indexes MultiViews FollowSymLinks AllowOverride None Order deny,allow Deny from all Allow from 127.0.0.0/255.0.0.0 ::1/128 </Directory> <IfModule mod_fastcgi.c> AddHandler php5-fcgi .php Action php5-fcgi /php5-fcgi Alias /php5-fcgi /usr/lib/cgi-bin/php5-fcgi FastCgiExternalServer /usr/lib/cgi-bin/php5-fcgi -host 127.0.0.1:9000 -pass-header Authorization </IfModule> </VirtualHost> /etc/security/limits.conf * soft nofile 1000000 * hard nofile 1000000 So, I would trully appreciate your advice to setup Apache2 to make it able to sustain 1.000 simultaneous clients, if this is even possible. TIA for your help. Cheers.

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  • connecting to bsnl wll, with huawei fixed wireless modem with connected to usb port on linux mint.

    - by Rakesh
    On windows, when I plugged in the usb connector, to the device was recognized as a mass storage device and installed all the drivers, to my computer, then the device, automatically restarted and started behaving like a modem, I'm writing this post, using the same modem, through windows... On linux mint (debian kernel, similar to ubuntu 8.10), the device is recognized as a mass storage device, some times, but, has no programs, useful for linux... When I use the modem on windows and restart the computer and login to linux, the device shows up as "not yet configured" in the terminal command "lsusb"... I googled a lot for solutions, tried many things, atlast, configured it and run the command "wvdial". But, get the error, that the modem is not responding, at last ! :'( Please help me out... Many more people are facing this problem, as I could discover, when I googled for it. this is the website address of huawei, the company of my modem... "www.huawei.com" Specification: model: ETS1220 FEQ: 800M Thank you.

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  • How to get a new-pssession in PowerShell to talk to my ICS-connected laptop for Remoting

    - by Scott Bilas
    If I have my laptop on the LAN, then Powershell remoting works fine from my workstation to the laptop. However, the LAN is wireless, and so sometimes I will connect on a wire to my workstation. It has two ethernet ports so I have the secondary wired up to share to the laptop using Win7's Internet Connection Sharing. (Btw I know that avoiding ICS would solve the problem, but that's not an option right now.) So my question is: what magic registry bits or command line options do I need to flip to get remoting to work to my laptop through ICS? Here's what happens when I try it: new-pssession -computername 192.168.137.161 [192.168.137.161] Connecting to remote server failed with the following error message : The WinRM client cannot process the request. Default authentication may be used with an IP address under the following conditions: the transport is HTTPS or the destination is in the TrustedHosts list, and explicit credentials are provided. Use winrm.cmd to configure TrustedHosts. Note that computers in the TrustedHosts list might not be authenticated. For more information on how to set TrustedHosts run the following command: winrm help config. For more information, see the about_Remote_Troubleshooting Help topic. + CategoryInfo : OpenError: (System.Manageme....RemoteRunspace:RemoteRunspace) [], PSRemotingTransportException + FullyQualifiedErrorId : PSSessionOpenFailed I'm having a hard time understanding the documentation for PowerShell and WinRM. I've tried messing with allowing ports in the firewall and setting TrustedHosts to * on my workstation (don't think this is a good idea on the laptop). I have no idea where to go from here, would appreciate any help.

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  • Send option/alt key press to OS X connected from Windows via VNC?

    - by sohocoke
    I recently started using a mac running Leopard Server remotely at work, using the RealVNC client to connect from my Windows XP workstation via the Leopard VNC server. As I need to do a fair amount of editing, I would like to have the keys mapped to the same positions as the macs I have been using for a long time. The Ctrl key works as Ctrl, and the Alt key works as Cmd, which is good, but I have had no success getting the Windows logo key to work as Option/Alt. It's seriously affecting my productivity in XCode and Terminal. Has anybody with the same setup solved this question, either by configuring Windows and/or the VNC client, or otherwise?

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  • RAID0 array of USB 2 disks, both connected to a single hub. Any benefit?

    - by Josh
    I have two unused USB 2 drives. I wanted to stripe them in a RAID0 configuration for fast disk access for virtual machines. (I find running a VMware virtual machine off a USB2 drive to be painfully slow. Especially Windows Vista) If I have both USB drives attached to the same USB2 hub, will that negate any benefit I gain by creating a RAID0 array? That is to say, is the speed of USB2 the limiting factor or is the speed of the drives? Would I get better performance by attaching one or both drives directly to my computer?

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  • How to fix display on external Samsung Syncmaster shifted to the right when connected to Macbook Pro?

    - by joe larson
    Is there something special I need to do to be able to use external LCD displays with my new MacBook Pro? Do I need extra software, or do I possibly need a different cable? I'm attempting to use an external display with my MBP. I've got a "Mini DisplayPort to VGA Female Adapter for Mac", plugged into the thunderbolt port on my MBP, which I understood should be compatible with thunderbolt. I've tried this with three different SyncMaster models: a B2330 (21.5"), a EX2220 (22"), and a third (also 22" ish) which I don't have the model # for -- but all are 1920x1080 resolution; plus an additional HP monitor of similar size and resolution. In all four cases, the MBP recognizes the screen and choses the correct resolution. However, the display is shifted over about 1 inch. This is true no matter if I change screen resolutions also. The controls on the monitor for horizontal position don't help. Also, sometimes (especially if I drag an app over into the second screen), the screen starts skipping left to right and having bands of fuzz. Additionally, the monitor will periodically blink off for a moment, trying to switch from Digital to Analog and back (the Syncmaster shows text on the screen to tell you it's trying to do this). Often when it comes back from one of these blank-outs, it will show OK (no skipping or fuzz) but still shifted right; then after a few seconds it will go wrong again skipping and fuzzy. This photo shows the worst of it. I've added red rectangles to show the physical edge of the screen, and a yellow rectangle to show the empty space on the left of the screen. (Sorry for the awful quality and lighting!) Also, it's worth noting I am on Mac OS X 10.6.7, and yes I have this update 1.4 installed.

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  • 2D Grid Map Connectivity Check (avoiding stack overflow)

    - by SombreErmine
    I am trying to create a routine in C++ that will run before a more expensive A* algorithm that checks to see if two nodes on a 2D grid map are connected or not. What I need to know is a good way to accomplish this sequentially rather than recursively to avoid overflowing the stack. What I've Done Already I've implemented this with ease using a recursive algorithm; however, depending upon different situations it will generate a stack overflow. Upon researching this, I've come to the conclusion that it is overflowing the stack because of too many recursive function calls. I am sure that my recursion does not enter an infinite loop. I generate connected sets at the beginning of the level, and then I use those connected sets to determine connectivity on the fly later. Basically, the generating algorithm starts from left-to-right top-to-bottom. It skips wall nodes and marks them as visited. Whenever it reaches a walkable node, it recursively checks in all four cardinal directions for connected walkable nodes. Every node that gets checked is marked as visited so they aren't handled twice. After checking a node, it is added to either a walls set, a doors set, or one of multiple walkable nodes sets. Once it fills that area, it continues the original ltr ttb loop skipping already-visited nodes. I've also looked into flood-fill algorithms, but I can't make sense of the sequential algorithms and how to adapt them. Can anyone suggest a better way to accomplish this without causing a stack overflow? The only way I can think of is to do the left-to-right top-to-bottom loop generating connected sets on a row basis. Then check the previous row to see if any of the connected sets are connected and then join the sets that are. I haven't decided on the best data structures to use for that though. I also just thought about having the connected sets pre-generated outside the game, but I wouldn't know where to start with creating a tool for that. Any help is appreciated. Thanks!

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  • How to detect/list rogue computers connected to a WIFI network without access to the Wifi Router interface?

    - by JJarava
    This is what I believe to be an interesting challenge :) A relative (that leaves a bit too far to go there in person) is complaining that their WIFI/Internet network performance has gone down abysmally lately. She'd like to know if some of the neighbors are using her wifi network to access the internet but she's not too technically savvy. I know that the best way to prevent issues would be to change the Router password, but it's a bit of a PITA having to re-configure all wifi devices... and if the uninvited guest broke the password once, they can do it again... Her wifi router/internet connection is provided by the telco, and remotely managed so she can log-on to their telco account's page and remotely change the router's Wifi password, but doesn't have access to the router status page/config/etc unless she opts out of the telco's remote support and mainteinance service... So, how could she check if there are guests in the wifi with this restrictions and in the most "point and click way"? In this case I'd probably use nmap to look for other devices in the network, but I'm not sure if that's the easiest way to do it. I'm not a wifi expert, so I don't know if there are any wifi-scanning utils that can tell us who's talking to the router... Lastly, she's a Windows user as I guess that'll influence the choice of tools available Any suggestions more than welcome Regards!

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  • What are potential reasons a user could be connected to a home network, but not to the internet?

    - by Matthew
    I have a friend that recently started using Ubuntu, and I've been answering his questions via the internet. However, I'm stuck on this one. He bought Linksys WPC11 wireless card, and says he was able to create a network connection, but was unable to ping or use a browser. I'm not quite sure where to start in figuring this out--what are some common causes of this sort of problem?

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  • How to maximise performance in computers connected into LAN via Gigabit ethernet router?

    - by penyuan
    Our group is setting up a server (which might just be a NAS, but we're not sure yet), which shares files, so that it connects to all other computers in the room (about 10 of them). I am thinking just hooking all of them up via a gigabit router/switch. Is there anything I should watch out for, in terms of cables, connections, or the connection capabilities of each computer in the network? For instance, I don't want a slow computer in the LAN to slow down everyone else's connection, etc., etc. Thanks for the education.

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  • When disabling the firewire-driver in Windows will this too disable firewire connected through a PCMCIA device?

    - by Christoffer
    The broader overarching question (not seeking an answer to this, but wanted to provide context) is how do I ensure that laptops running Microsoft Windows 7 and exposing DMA-ports (eg. firewire) are disabled once the operating system have loaded. Preventing the Firewire-driver from loading once Windows have booted works as expected, but I've been unable to confirm whether this too will disable a Firewire-port exposed through a PCMCIA-card. My question is hence whether disabling the Firewire-driver will also prevent a Firewire-port exposed through a PCMCIA from functioning?

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  • Ubuntu networking issue: two specific machines cannot browse web while connected to network at the same time.

    - by jensendarren
    I have setup a secure wireless network which works very well except for two laptops running Ubuntu 10.10 that can't access the Internet via a browser at the same time. They can both ping sites, wget sites, use skype but when using a browser the page never loads (in Firefox the status bar just sits there saying "Connecting" until it times out.) Here is what we have tried so far (nothing has fixed this issue): OpenDNS Restart networking services Using wired connection rather than wireless Removing all other nodes from the network except the two machines that have this issue Swapped out the router Factory reset the router Reformatted one of the machines and re-installed Ubuntu 10.10 Other things that we have checked: The two machines can connect simultaneously without any issues to other wireless networks in different locations (say in an Internet Cafe or another office) The two machines have unique IP addresses The two machines have unique MAC addresses The two machines can communicate on the network using Skype, wget, ping etc We are not using a proxy on either machine FYI: I have attached output from wireshark. For the test we turned both machines on and pointed them both to the same website. The content loaded on one and not the other. Here is the output from wireshark- (speedyshare.com/files/26228631/machine_output_1 && speedyshare.com/files/26228649/machine2). As you can see the first one worked, the second one didn't. I don't fully understand the output and would appreciate if someone could shed some light on what might be causing this and how we can fix it! Many thanks! Darren

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  • What methods are available for updating a non-Internet-connected VMWare ESXi host?

    - by romandas
    I have a stand-alone installation of VMWare vSphere Essentials, with a vCenter Server and 3 ESXi 4.0 host servers. The environment is intended to remain as a stand-alone network, with the exception that I can "float" a workstation or server between the 'Net and the VMWare network for patches and maintenance. With other installations, where the Internet is available, I've used the vSphere Host Update utility to connect to VMWare and then apply the patches to the ESXi hosts. My problem is that this utility does not seem to function if it cannot connect to both VMWare and the ESXi host at the same time, as the scan for patches function will not scan the server without connecting to VMWare's site to sync its repository first. Even if I sync it, disconnect from the 'Net and connect to the VMWare network, it still won't scan hosts for required patches -- it will prompt for syncing with VMWare and if you click No to syncing, the scan does not occur. Does anyone know of other options for updating the ESXi hosts in some automated fashion? I believe I can manually pull down required patches and apply them, but this will not scale well, and in the future I'm sure I'll want something a bit more scalable.

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  • Is it possible to run an Automator workflow when a USB device is connected?

    - by pkaeding
    I would like to run an Automator workflow every time I connect a certain thumbdrive to my OS X Snow Leopard system. This workflow will copy certain files from my hard drive onto the thumb drive. I have the workflow part figured out, but I don't know how to trigger it. Ideally, I wouldn't need to do anything; it would run as soon as the drive is mounted. Is this possible? Am I approaching this from the wrong angle? The solution only really needs to work on Snow Leopard. Thanks!

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