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• Mac Grey/White Screen of Death

  - by cust0s

  The other night I updated my iTunes to the latest version (through Software Update) when I came to turn on my computer I was greeted with the dreaded white screen of death. I use an early 2008 iMac 24". I've tried the basic things, unplugging/turning off accessories, trying to boot from the install disk, reseting pram, etc, etc. Still no luck and no change what-so-ever. All I've been able to ascertain that my keyboard still works (by ejecting). I should point out that I did recently replace my Hard drive with a Western Digital Black 500GB (though the computer is well out of warrenty) and I'm a little concerned that the problem could be the screen. Update (18/05/10): I've been told that I could be getting the White/Grey screen of death because the optical flex cable is damaged (aparently this is common). Apparently the Optical Drive is part of the POST sequence, and an inability to read the drive can result in failure for the system to move on to other bootable volumes. More info here. I will disable the optical drive and see if that works.

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• sysctl.conf not running on boot

  - by Brian

  At what point is sysctl.conf supposed to be read during boot, and why might it not be running? I have the following settings which are not being applied when I reboot: net.bridge.bridge-nf-call-arptables = 0 net.bridge.bridge-nf-call-ip6tables = 0 net.bridge.bridge-nf-call-iptables = 0 net.bridge.bridge-nf-filter-pppoe-tagged = 0 net.bridge.bridge-nf-filter-vlan-tagged = 0 fs.nfs.nlm_udpport = 32768 fs.nfs.nlm_tcpport = 32768 The first section is needed for KVM bridging, and the second is to run the NFS lock manager on a known port. However, after booting, these values have not taken effect. If I run sysctl -p, then they do. This wouldn't be a huge issue, except that I can't figure out how to restart the lock manager without rebooting. I would really like to know why sysctl.conf isn't working at boot, but I'd settle for just being able to restart the lock manager. This is on Ubuntu server 10.04.2, kernel 2.6.32-31-server. I know some daemons check the permissions on their config files and refuse to work if they're too permissive, but sysctl.conf is 644 root:root, which I'm pretty sure is the default.

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• Sun T5120: Memory issue with 8GB DIMMs, "Unsupported memory configuration"

  - by watain

  I'm trying to upgrade RAM in a Sun T5120 server, replacing 2GB (Sun P/N: 501-7953-01) with 8GB DIMMs (Sun P/N: 511-1262-01). When bringing up the host system, I get the following errors on the ILOM: -> show faulty Target | Property | Value --------------------+------------------------+--------------------------------- /SP/faultmgmt/0 | fru | /SYS/MB /SP/faultmgmt/0/ | timestamp | Dec 14 15:29:42 faults/0 | | /SP/faultmgmt/0/ | sp_detected_fault | /SYS/MB/CMP0/MCU3 Forced fail faults/0 | | (IBIST) /SP/faultmgmt/0/ | timestamp | Dec 14 15:29:28 faults/1 | | /SP/faultmgmt/0/ | sp_detected_fault | /SYS/MB/CMP0/MCU2 Forced fail faults/1 | | (IBIST) /SP/faultmgmt/0/ | timestamp | Dec 14 15:29:13 faults/2 | | /SP/faultmgmt/0/ | sp_detected_fault | /SYS/MB/CMP0/MCU1 Forced fail faults/2 | | (IBIST) /SP/faultmgmt/0/ | timestamp | Dec 14 15:28:59 faults/3 | | /SP/faultmgmt/0/ | sp_detected_fault | /SYS/MB/CMP0/MCU0 Forced fail faults/3 | | (IBIST) /SP/faultmgmt/1 | fru | /SYS /SP/faultmgmt/1/ | timestamp | Dec 14 15:29:42 faults/0 | | /SP/faultmgmt/1/ | sp_detected_fault | Dec 14 15:29:42 ERROR: faults/0 | | Unsupported memory | | configuration As you can see, the only error message I get is "Unsupported memory configuration". Note that I'm absolutely sure that I placed in the DIMMs in the correct slots. Might this issue be related to the Voltage of the DIMMs? Any suggestions on how to trouble-shoot this issue? This issue seems to be similar to the one explained at "Inserted disabled" while upgrading Sun Sparc t5120 memory. However the given link http://docs.sun.com/source/820-4445-10/chapter1.html seems to point to an inexistent page...

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• Haproxy not properly passing on X-Forwarded-For header

  - by JesseP

  I have backend web servers that receive requests by way of haproxy-nginx-fastcgi. The web app used to see multiple ip's coming through in the X-Forwarded-For header, chained together with commas (most original IP on the left). At some point in the recent past (just noticed, so not sure what caused it) something changed, and now I'm only seeing a single IP passed in the header to my web application. I've tried with haproxy 1.4.21 and 1.4.22 (recent upgrade) with the same behavior. Haproxy has the forwardfor header set: option forwardfor Nginx fastcgi_params config defines this header to be passed to the app: fastcgi_param HTTP_X_FORWARDED_FOR $http_x_forwarded_for; Anyone have any ideas on what might be going wrong here? EDIT: I just started logging the $http_x_forwarded_for variable in nginx logs, and nginx is only ever seeing a single IP, which shouldn't ever be the case, as we should always see our haproxy ip added in there, right? So, issue must either be in nginx handling of the variable coming in, or haproxy not building it properly. I'll keep digging... EDIT #2: I enabled request and response header logging in HAProxy, and it is not spitting anything out for X-Forwarded-For, which seems very odd: Oct 10 10:49:01 newark-lb1 haproxy[19989]: 66.87.95.74:47497 [10/Oct/2012:10:49:01.467] http service/newark2 0/0/0/16/40 301 574 - - ---- 4/4/3/0/0 0/0 {} {} "GET /2zi HTTP/1.1" O Here are the options i set for this in my frontend: mode http option httplog capture request header X-Forwarded-For len 25 capture response header X-Forwarded-For len 25 option httpclose option forwardfor EDIT #3: It really seems like haproxy is munging the header and just passing on a single one to the backend. This is fairly impacting to our production service, so if anyone has an ideas it would be greatly appreciated. I'm stumped... :(

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• 403 Forbidden When Using AuthzSVNAccessFile

  - by David Osborn

  I've had a nicely functioning svn server running on windows that uses Apache for access. In the original setup every user had access to all repositories, but I recently needed the ability to grant a user only access to one repository. I uncommented the AuthzSVNAccessFile line in my httpd.conf file and pointed it to an accessfile and setup the access file, but I get a 403 Forbidden when I go to mydomain.com/svn . If I recomment out this line then things work again. I also made sure I uncommented the LoadModule authz_svn_module and verified that it was point to the correct file. Below is the Location section of my httpd.conf and my svnaccessfile httpd.conf (location section only) <Location /svn> DAV svn SVNParentPath C:\svn SVNListParentPath on AuthType Basic AuthName "Subversion repositories" AuthUserFile passwd Require valid-user AuthzSVNAccessFile svnaccessfile </Location> (I want a more complex policy in the long run but just did this to test the file out) svnaccessfile [svn:/] * = rw I have also tried just the below for the svnaccessfile. [/] * = rw I also restart the service after each change just to make sure it is taken.

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• Windows 8.1 - Won't boot (0xc000000f), bcdedit fails

  - by user3014097

  I’m pretty much stuck at this point. So, backstory: Windows was installed on one of the SSDs currently in my tower. I bought a new SSD to install Windows (8.1 64 bit) on. Windows installation went fine, booted up, and formatted the old SSD from within Windows (this seems to have been a mistake, but I didn’t realize that at the time). Despite formatting the old SSD, whenever I tried to boot I was told that there were 2 Windows installations. Apparently, when I formatted the old drive, not all of the partitions were removed. So, I booted up with the repair utility, went into cmd, and deleted the non-primary partitions on the old SSD (there were 2 – think they were system and recovery, although I’m forgetting now). Reboot – computer won’t boot. Getting the 0xc000000f “The boot selection failed because a required device is inaccessible” error. Troubleshooting so far: Automatic repair doesn’t fix anything (I’ve never had luck with it though) If I go to install a new version of Windows, the drives and partitions are all there. The SSD is functioning, I at least know that. I’ve essentially gone through this guide: https://neosmart.net/wiki/recovering-windows-bootloader/ Unfortunately, I’m not getting anywhere. I’m not even entirely sure how to describe the errors I’m getting, so I’ve just included pictures of every step (I can't actually post them though so I just included a photobucket link). http://s319.photobucket.com/user/DGalt11/library/Computer%20Issue Am I completely screwed here (i.e. reformat and reinstall?)? Thanks

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• IIS 7.5 Manager crashes when adding a custom error page

  - by dig412

  I'm running a local IIS 7.5 server in Win 7 Pro, and I'm trying to add a custom error page for 403 responses. When I click OK to add a custom error page for my site, IIS Manager just vanishes. The server is still running, and I can re-start IIS Manager, but the new page has not been saved. I've also tried adding it directly to web.config, but that just gives me The page cannot be displayed because an internal server error has occurred. Does anyone know why this might be happening? Edit: The event log implies that an invalid character in the path caused the crash, but It occured even when I copied & pasted a path from a valid entry. Application error log: IISMANAGER_CRASH IIS Manager terminated unexpectedly. Exception:System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. --- System.ArgumentException: Illegal characters in path. at System.IO.Path.CheckInvalidPathChars(String path) at System.IO.Path.IsPathRooted(String path) at Microsoft.Web.Management.Iis.CustomErrors.CustomErrorsForm.OnAccept() at Microsoft.Web.Management.Client.Win32.TaskForm.OnOKButtonClick(Object sender, EventArgs e) at System.Windows.Forms.Control.OnClick(EventArgs e) at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent) at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ButtonBase.WndProc(Message& m) at System.Windows.Forms.Button.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg) at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData) at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context) at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context) at System.Windows.Forms.Form.ShowDialog(IWin32Window owner) at Microsoft.Web.Management.Host.UserInterface.ManagementUIService.ShowDialogInternal(Form form, IWin32Window parent) at Microsoft.Web.Management.Host.UserInterface.ManagementUIService.Microsoft.Web.Management.Client.Win32.IManagementUIService.ShowDialog(DialogForm form) at Microsoft.Web.Management.Client.Win32.ModulePage.ShowDialog(DialogForm form) at Microsoft.Web.Management.Iis.CustomErrors.CustomErrorsPage.AddCustomError() --- End of inner exception stack trace --- at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at Microsoft.Web.Management.Client.TaskList.InvokeMethod(String methodName, Object userData) at Microsoft.Web.Management.Host.UserInterface.Tasks.MethodTaskItemLine.InvokeMethod() at System.Windows.Forms.LinkLabel.OnMouseUp(MouseEventArgs e) at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.Label.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg) at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData) at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context) at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context) at Microsoft.Web.Management.Host.Shell.ShellApplication.Execute(Boolean localDevelopmentMode, Boolean resetPreferences, Boolean resetPreferencesNoLaunch) Process:InetMgr

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• nginx error page and internal directives not working as expected

  - by Romain

  I'd like to setup my nginx server to return a specific error page on HTTP 50x status codes, and I'd like this page to be unavailable by a direct request from users (e.g., http//mysite/internalerror). For that, I'm using nginx's internal directive, but I must be missing something, as when I put that directive on my /internalerror location, nginx returns a custom 404 error (which isn't even my own 404 error page) when a page crashes. So, to summarize, here's what seems to happen: GET /Home nginx passes the query to Python I'm simulating an application bug to get the 502 error code nginx tries to return /InternalError from its error_page rule because of the internal rule, it finally fails back to a custom 404 error code <-- why? the documentation says error_page directives are not concerned by internal: http://wiki.nginx.org/HttpCoreModule#internal Here's an extract from nginx.conf with a few comments to point things out: error_page 404 /NotFound; error_page 500 502 503 504 =500 /InternalError; # HTTP 500 Error page declaration location / { try_files /Maintenance.html $uri @pythonbackend; } location @pythonbackend { include uwsgi_params; uwsgi_pass unix:///tmp/uwsgi.sock; } location ~* \.(py|pyc)$ { # This internal location works OK and returns my own 404 error page internal; } location /__Maintenance.html { # This one also works fine internal; } location ~* /internalerror { # This one doesn't work and returns nginx's 404 error page when I trigger an error somewhere on my site internal; } Thanks very much for your help!!

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• Apache2 - Hosting two sites on the same domain with different ports

  - by user1026361

  I am hosting a staging site (test.mydomain.com) which currently work well on port 80 for two sites (test.mydomain.com and test.FRmydomain.com) I am working on a new backend and I would like to deploy a third site on this server for testing. My hope is that it will live at test.mydomain.com:4204. I've got some experience with apache and quickly added statements: Listen 4204 NameVirtualHost *:4204 and created a new config for my site. What I imagine are the relevant parts of my config: <VirtualHost *:4204 > ServerAdmin [email protected] ServerName test.mydomain.com:4204 However, the site is not publicly available, by name or ip. If i curl localhost:4204 from the server, I get the expected page content At this point, I'm a bit of a loss on how to go forwards. It seems like my config is correct but not available to be served. Am I better off defining a proxy definition so that, for instance: test.mydomain.com/4204 proxies to my localhost server or is there a way to make the site available via the internet? EDIT: I have added an iptable rule after further Googling with the command: iptables -I INPUT -p tcp --dport 4204 -j ACCEPT I can see apache listening on 4204 and the rule is definitely in place but cant reach the site

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• BSOD during Cygwin install

  - by Mike Pennington

  I have been running Cygwin (1.7.7) under Windows Vista 64-bit, SP2 for at least a year, and had no problems with my installation at all until today. When I tried to install apt-cyg, I realized that I needed to get the svn client. During the installation of the package dependencies, Vista threw a blue screen of death. I hoped this was a one-time occurrence, so I rebooted into Vista and tried to install svn again; same result. Next I completely removed Cygwin's directory, and all Cygwin registry entries; at this point, I tried reinstalling the base Cygwin system again. During the installation of bash, I got another BSOD: Apologies for the fuzzy pic, I had to shoot with my phone camera. I googled for BSOD and Cygwin and found a post by Dave Korn mentioning that the only reasons Cygwin should cause a BSOD is because of either ioperm.sys or some USB utilities. I have neither on my system. Every time I have tried reinstalling, Vista BSODs; I have not had problems installing any other software packages on this Vista machine. How can I get Cygwin installed again (without reinstalling Vista)?

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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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• Linux Tuning for High Traffic JBoss Server with LDAP Binds

  - by Levi Stanley

  I'm configuring a high traffic Linux server (RedHat) and running into a limit I haven't been able to track down. I need to be able to handle sustained 300 requests per second throughput using Nginx and JBoss. The point of this server is to run checks on a user's account when that user signs in. Each request goes through Nginx to JBoss (specifically Torquebox with JBoss A7 with a Sinatra app) and then makes an LDAP request to bind that user and retrieve several attributes. It is during the bind that these errors occur. I'm able to reproduce this going directly to JBoss, so that rules out Nginx at least. I get a variety of error messages, though oddly JBoss stopped writing to the log file recently. It used to report errors about creating native threads. Now I just see "java.net.SocketException: Connection reset" and "org.apache.http.conn.HttpHostConnectException: Connection to http://my.awesome.server:8080 refused" as responses in jmeter. To the best of my knowledge, I have plenty of available file handles, processes, sockets, and ports, yet the issue persists. Unfortunately, I have very little experience tuning servers. I've found a couple useful documents - Ipsysctl tutorial 1.0.4 and Linux Tuning - but those documents are a bit over my head (and just entering the the configuration described in Linux Tuning doesn't fix my issue. Here are the configuration changes I've tried (webproxy is the user that runs Nginx and JBoss): /etc/security/limits.conf webproxy soft nofile 65536 webproxy hard nofile 65536 webproxy soft nproc 65536 webproxy hard nproc 65536 root soft nofile 65536 root hard nofile 65536 root soft nproc 65536 root hard nofile 65536 First attempt /etc/sysctl.conf sysctl net.core.somaxconn = 8192 sysctl net.ipv4.ip_local_port_range = 32768 65535 sysctl net.ipv4.tcp_fin_timeout = 15 sysctl net.ipv4.tcp_keepalive_time = 1800 sysctl net.ipv4.tcp_keepalive_intvl = 35 sysctl net.ipv4.tcp_tw_recycle = 1 sysctl net.ipv4.tcp_tw_reuse = 1 Second attempt /etc/sysctl.conf net.core.rmem_max = 16777216 net.core.wmem_max = 16777216 net.ipv4.tcp_rmem = 4096 87380 16777216 net.ipv4.tcp_wmem = 4096 65536 16777216 net.core.netdev_max_backlog = 30000 net.ipv4.tcp_congestion_control=htcp net.ipv4.tcp_mtu_probing=1 Any ideas what might be happening here? Or better yet, are there some good documentation resources designed for beginners?

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• Google-Bot fell in love with my 404-page

  - by 32bitfloat

  Every day my access-log looks kind of this: 66.249.78.140 - - [21/Oct/2013:14:37:00 +0200] "GET /robots.txt HTTP/1.1" 200 112 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)" 66.249.78.140 - - [21/Oct/2013:14:37:01 +0200] "GET /robots.txt HTTP/1.1" 200 112 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)" 66.249.78.140 - - [21/Oct/2013:14:37:01 +0200] "GET /vuqffxiyupdh.html HTTP/1.1" 404 1189 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)" or this 66.249.78.140 - - [20/Oct/2013:09:25:29 +0200] "GET /robots.txt HTTP/1.1" 200 112 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)" 66.249.75.62 - - [20/Oct/2013:09:25:30 +0200] "GET /robots.txt HTTP/1.1" 200 112 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)" 66.249.78.140 - - [20/Oct/2013:09:25:30 +0200] "GET /zjtrtxnsh.html HTTP/1.1" 404 1186 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)" The bot calls the robots.txt twice and after that tries to access a file (zjtrtxnsh.html, vuqffxiyupdh.html, ...) which cannot exist and must return a 404 error. The same procedure every day, just the unexisting html-filename changes. The content of my robots.txt: User-agent: * Disallow: /backend Sitemap: http://mysitesname.de/sitemap.xml The sitemap.xml is readable and valid, so there seems to be no reason why the bot should want to force a 404-error. How should I interpret this behaviour? Does it point to a mistake I've done or should I ignore it?

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• Adding a Second Wireless Router to an Existing Wired Network

  - by KVCrawford

  I apologize ahead of time, I know this has been asked before, but I'm still having problems...maybe you guys can help. I started out with the basic instructions from the highest-voted answer at http://serverfault.com/questions/41572/adding-a-second-wireless-router-to-my-network The new Wireless router in question is a Linksys Wireless-N Gigabit Router, Model # WRT310N Here are the steps I've taken in setting it up: Plug my laptop into LAN port #2 in the new router. Nothing else is connected at this point Configure the new router to be 192.168.1.200 (the original router is 192.168.1.1, and its DHCP clients are from 192.168.1.100-x.x.x.199) Set the internet connection on the new router to "DHCP Client" Turn off the DHCP server & NAT routing on the new router Plug in a LAN cable from the original router into the LAN port #1 on the new router (NOT the WAN port, nothing is plugged in there) Reset the new router Afterwards, I try to ping 192.168.1.1 from the laptop plugged into LAN port #2 on the new router, with no response. 192.168.1.200 garners no response either. Typing "ipconfig" tells me: Autoconfiguration IP Address: 169.254.198.113 Subnet Mask: 255.255.0.0 Default Gateway: 169.254.198.113 What's going wrong? I appreciate any help!

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• Successful login with iscsiadm on target still doesn't create block device

  - by Halfgaar

  I've set up an experiment to test iscsitarget and initiator, which at some point worked. Later, I turned the setup back on and much to my dismay, the initiator machine stopped making block devices for its successful logins. As far as I know, I haven't changed anything on either machine. Some details: # iscsiadm -m node --login Logging in to [iface: default, target: iqn.2010-12.nl.ytec.arbiter:arbiter.lun1, portal: 10.0.0.1,3260] Logging in to [iface: default, target: iqn.2010-12.nl.ytec.arbiter:arbiter.lun2, portal: 10.0.0.1,3260] Login to [iface: default, target: iqn.2010-12.nl.ytec.arbiter:arbiter.lun1, portal: 10.0.0.1,3260]: successful Login to [iface: default, target: iqn.2010-12.nl.ytec.arbiter:arbiter.lun2, portal: 10.0.0.1,3260]: successful Sessions: # iscsiadm -m session tcp: [3] 10.0.0.1:3260,1 iqn.2010-12.nl.ytec.arbiter:arbiter.lun1 tcp: [4] 10.0.0.1:3260,1 iqn.2010-12.nl.ytec.arbiter:arbiter.lun2 Netstat: # netstat -n -p|grep 3260 tcp 0 0 10.0.0.2:48719 10.0.0.1:3260 ESTABLISHED 1078/iscsid tcp 0 0 10.0.0.2:48718 10.0.0.1:3260 ESTABLISHED 1078/iscsid /var/log/syslog doesn't give errors: Jan 27 11:41:49 vmnode001 kernel: [ 378.041749] scsi7 : iSCSI Initiator over TCP/IP Jan 27 11:41:49 vmnode001 kernel: [ 378.044180] scsi8 : iSCSI Initiator over TCP/IP lsscsi doesn't show my devices: [0:0:1:0] cd/dvd TSSTcorp DVD-ROM TS-L333A D100 /dev/sr0 [4:0:0:0] disk ATA Hitachi HUA72105 A74A - [4:0:1:0] disk ATA Hitachi HUA72105 A74A - [4:1:0:0] disk Dell VIRTUAL DISK 1028 /dev/sda And there are no block devices in /dev for it: # ls -1 /dev/sd* /dev/sda /dev/sda1 /dev/sda2 /dev/sda3 /dev/sda4 I tried loading all scsi kernel modules I could find, but that doesn't seem to be the problem. I reall don't get this; it used to work. I found people with similar problems (here and here) but no solution. Initiator is Debian Sqeeuze (testing), target is Debian Lenny (stable). iscsitarget is 0.4.16+svn162-3.1+lenny1, open-iscsi (initiator) is 2.0.871.3-2squeeze1. Target kernel: 2.6.26-2-amd64, initiator kernel: 2.6.32-5-amd64

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• AWS Linux EC2: yum won't run with plugins

  - by Patrick

  Short Version: yum commands on my Amazon Linux EC2 AMI only work with --noplugins. Long Version: A couple of days ago, I ran yum update at the behest of the SSH Login MoTD telling me I had updates to install. About midway through the update (specifically while updating the kernel), the update abruptly ended (79 of 138 items completed). The website I host on EC2 got weird for a few minutes, but eventually seemed to stabilize back out (maybe EC2 restarted itself?), and I didn't have further issues (other than MySQL started running out of memory, but I think that's probably unrelated to this). Today, I went to install gcc-c++ (with yum install gcc-c++). When I did, I got the following message: Loaded plugins: priorities, security, update-motd, upgrade-helper Config error: Command "updateinfo" already defined and I get that for any command I can think to run using yum. However, If I throw in the --noplugins flag, then magically it seems to work. To be clear, when I installed a different package a week ago, it worked totally correctly, so the yum update is the only thing I can think of that changed. I could find nothing on Google with regard to "updateinfo" already defined (with and without quotes). I tried running yum update --noplugins which spit out a message telling me that I should have run yum-complete-transaction instead, but proceeded to try to update something on its own. When that completed, I tried yum-complete-transaction but that gave me a message about the transactions not lining up correctly, so it removed the old transaction (Probably since I should have completed the first transaction before trying to update again, if I had known). Based on the SF question "Linux EC2 Broken Yum", I've also tried yum clean all --noplugins (fails the same with plugins) which just gives me Cleaning repos: amzn-main amzn-updates rpmforge Cleaning up everything I also tried package-cleanup --problems Loaded plugins: priorities, update-motd, upgrade-helper No Problems Found and package-cleanup --dupes Gives a lot of dupes, so I pasted them here: http://pastebin.com/VVFQEkTT instead of inline. At this point, I'm not sure what else there even is to check.

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• IIS FTP 7.5 Data Channel Problem (SSL)

  - by user59050

  Hey there I wonder if anyone can get me in the right direction. I am setting up both a FTPS Client and Server, FTPS Server using Microsoft’s iis FTP 7.5. On the client side it will be running on Linux and I am using M2crypto for the openssl wrapping (python). I am worried the problem is on the server side (iis7.5) due to the following discovery : If I host using Filezilla with BOTH the control and data channel being forced to be encrypted it works 100% (100% file transmission), if i use iis as the server everything works up to the point when the data channel takes over... i.e. all data of the retrieved file is already received correctly in my basket! The ftp server just won't send the final '226 Transfer complete.' on the cmd socket. Why? If i force the client or server to close the connection the file is 100% intact....If i use iis 7.5 with forced encryption on control channel all works 100% as long as i don’t force data channel... Here are some screenshots to demo this... Client View after Kill Client : pics @ http://forums.iis.net/p/1172936/1960994.aspx#1960994 Summary : We can establish the connection, do directory listings, start the upload, see the file (0bytes) created on the server but then the client hangs. If we terminate the client, the uploaded file on the server suddenly jumps up to full size.

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• 3 Servers, is this is a cluster?

  - by Andy Barlow

  Hello, At the moment I have one Ubuntu server, 9.10, running with a simple Samba share, a mail server, DNS server and DHCP server. Mostly its just there for file sharing and email server. I also have 2 other servers that are exactly the same hardware and spec as the first, which have an rsync set up to retrieve the shared folders and backs them up. However, if the first server goes down, all of our shares disappear along with our mail and the system must be rebuilt. Also I tend to find if people are downloading a large amount from the file server, no-one can access there emails - especially in the morning when everyone is signing in at once. Would it be more beneficial for me to have all 3 servers, all running the same services, doing the same thing with some sort of cluster with load balancing? I'm not really sure where to begin looking, or how to go about such a setup where 3 servers are all identical, but perhaps one acts as the main load balancer?? If someone can point me in the right direction, or if this simply sounds like one of those Enterprise Cloud's that is now a default setup in Ubuntu Server 9.10+, then I'll go down that route. Cheers in advance. Andy

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• Windows XP error message: "Windows cannot find 'explorer.exe'"

  - by Meysam

  In Windows XP I can open "My Computer" and see all the hard drives. I can also see the explorer.exe process running among other processes in Task Manager. But after opening "My Computer", when I double click on one of the drives to open it, I get the following error message: Windows cannot find 'explorer.exe'. Make sure you typed the name correctly, and then try again. To search for a file, click the start button, and then click search. Although I could detect and remove several suspicious files using Malwarebytes & Microsoft Security Essentials, the problem still remains. The interesting point is that if I right click on one folder and select Open or Explore from the menu bar, I can open the folder! but if I double click on the folder, it does not open and I get the above error message. How can I fix this problem? Any advice would be appreciated! Update: I formatted the C: drive (NTFS), a deep format, and installed a fresh Windows XP on it. I am not getting this error when I double click on C drive icon anymore. But the same error appears when I double click on other drive names. Maybe I should format them too!

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• How to install pip/easy_install on debian 6 for python3.2

  - by atomAltera

  I'm trying to install pip or setup tools form python 3.2 in debian 6. First case: apt-get install python3-pip...OK python3 easy_install.py webob Searching for webob Reading http://pypi.python.org/simple/webob/ Reading http://webob.org/ Reading http://pythonpaste.org/webob/ Best match: WebOb 1.2.2 Downloading http://pypi.python.org/packages/source/W/WebOb/WebOb-1.2.2.zip#md5=de0f371b46554709ce5b93c088a11cae Processing WebOb-1.2.2.zip Traceback (most recent call last): File "easy_install.py", line 5, in <module> main() File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 1931, in main with_ei_usage(lambda: File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 1912, in with_ei_usage return f() File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 1935, in <lambda> distclass=DistributionWithoutHelpCommands, **kw File "/usr/local/lib/python3.2/distutils/core.py", line 148, in setup dist.run_commands() File "/usr/local/lib/python3.2/distutils/dist.py", line 917, in run_commands self.run_command(cmd) File "/usr/local/lib/python3.2/distutils/dist.py", line 936, in run_command cmd_obj.run() File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 368, in run self.easy_install(spec, not self.no_deps) File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 608, in easy_install return self.install_item(spec, dist.location, tmpdir, deps) File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 638, in install_item dists = self.install_eggs(spec, download, tmpdir) File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 799, in install_eggs unpack_archive(dist_filename, tmpdir, self.unpack_progress) File "/usr/lib/python3/dist-packages/setuptools/archive_util.py", line 67, in unpack_archive driver(filename, extract_dir, progress_filter) File "/usr/lib/python3/dist-packages/setuptools/archive_util.py", line 154, in unpack_zipfile data = z.read(info.filename) File "/usr/local/lib/python3.2/zipfile.py", line 891, in read with self.open(name, "r", pwd) as fp: File "/usr/local/lib/python3.2/zipfile.py", line 980, in open close_fileobj=not self._filePassed) File "/usr/local/lib/python3.2/zipfile.py", line 489, in __init__ self._decompressor = zlib.decompressobj(-15) AttributeError: 'NoneType' object has no attribute 'decompressobj' Second case: from http://pypi.python.org/pypi/distribute#installation-instructions python3 distribute_setup.py Downloading http://pypi.python.org/packages/source/d/distribute/distribute-0.6.28.tar.gz Extracting in /tmp/tmpv6iei2 Traceback (most recent call last): File "distribute_setup.py", line 515, in <module> main(sys.argv[1:]) File "distribute_setup.py", line 511, in main _install(tarball, _build_install_args(argv)) File "distribute_setup.py", line 73, in _install tar = tarfile.open(tarball) File "/usr/local/lib/python3.2/tarfile.py", line 1746, in open raise ReadError("file could not be opened successfully") tarfile.ReadError: file could not be opened successfully Third case: from http://pypi.python.org/pypi/distribute#installation-instructions tar -xzvf distribute-0.6.28.tar.gz cd distribute-0.6.28 python3 setup.py install Before install bootstrap. Scanning installed packages No setuptools distribution found running install running bdist_egg running egg_info writing distribute.egg-info/PKG-INFO writing top-level names to distribute.egg-info/top_level.txt writing dependency_links to distribute.egg-info/dependency_links.txt writing entry points to distribute.egg-info/entry_points.txt reading manifest file 'distribute.egg-info/SOURCES.txt' reading manifest template 'MANIFEST.in' writing manifest file 'distribute.egg-info/SOURCES.txt' installing library code to build/bdist.linux-x86_64/egg running install_lib running build_py copying distribute.egg-info/PKG-INFO -> build/bdist.linux-x86_64/egg/EGG-INFO copying distribute.egg-info/SOURCES.txt -> build/bdist.linux-x86_64/egg/EGG-INFO copying distribute.egg-info/dependency_links.txt -> build/bdist.linux-x86_64/egg/EGG-INFO copying distribute.egg-info/entry_points.txt -> build/bdist.linux-x86_64/egg/EGG-INFO copying distribute.egg-info/top_level.txt -> build/bdist.linux-x86_64/egg/EGG-INFO creating 'dist/distribute-0.6.28-py3.2.egg' and adding 'build/bdist.linux-x86_64/egg' to it Traceback (most recent call last): File "setup.py", line 220, in <module> scripts = scripts, File "/usr/local/lib/python3.2/distutils/core.py", line 148, in setup dist.run_commands() File "/usr/local/lib/python3.2/distutils/dist.py", line 917, in run_commands self.run_command(cmd) File "/usr/local/lib/python3.2/distutils/dist.py", line 936, in run_command cmd_obj.run() File "build/src/setuptools/command/install.py", line 73, in run self.do_egg_install() File "build/src/setuptools/command/install.py", line 93, in do_egg_install self.run_command('bdist_egg') File "/usr/local/lib/python3.2/distutils/cmd.py", line 313, in run_command self.distribution.run_command(command) File "/usr/local/lib/python3.2/distutils/dist.py", line 936, in run_command cmd_obj.run() File "build/src/setuptools/command/bdist_egg.py", line 241, in run dry_run=self.dry_run, mode=self.gen_header()) File "build/src/setuptools/command/bdist_egg.py", line 542, in make_zipfile z = zipfile.ZipFile(zip_filename, mode, compression=compression) File "/usr/local/lib/python3.2/zipfile.py", line 689, in __init__ "Compression requires the (missing) zlib module") RuntimeError: Compression requires the (missing) zlib module zlib1g-dev installed Help me please

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• Unable to connect to cable modem when connected to VPN

  - by Spuas

  the scenario is as follows: First I have a cable modem which gives the internet connection. The network is 192.168.0.0/24 and its IP is 192.168.0.1 Second line, I have a router connected to the cable modem. Its "outside" IP is 192.168.0.12. This router creates network 192.168.123.0/24 and its IP there is 192.168.123.254. My computer is wired to the router with IP 192.168.123.126. At this point I am able to access both devices web interfaces by their IPs on a browser (192.168.123.254 for the router and 192.168.0.1 for the cable modem). The problem I have is when I connect to a VPN from the computer. Then I am connected to a second network 10.0.0.0/24 and I get IP 10.0.0.200 (along with 192.168.123.126). I can connect to the router but then I loose connectivity to the cable modem: I cannot acces it through the browser, neither making a ping to it or a tracert. I have tried to add a new route to the windows routes by typing route ADD 192.168.0.1 MASK 255.255.255.0 192.168.123.254 but I cannot access it anyway... Am I missing something on the route adding? Which is the propper way of doing this? Thanks

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• Windows server 2008, Dns. I'm confused

  - by Dejan.S

  Hi. I recently setup a window server 2008 server at work. Keep in mind I have never worked with it before:). Background story is I try to host a couple of sites on the server through iis7, I got domains (currently hosted at other hosters for the moment). I want to point the domain NS to my server on all of them. I have read how to setup a DNS on the server, so far so good. now my dns is companyname.com in the server manager I got DNS / companyname.com in there I got ns.comanyname.com, in there I got Host(A) with the server ip now this is where I get confused about how things work with DNS, NS & Host(A). I dont know how to assign(so to speak) the Host(A) to one of my webapps hosted on the iis7, because that is the pointer right?. To leave an example to work with lets say, Hosted.com is hosted on my iis7, on port 81. You don't understand how great full I would be if somebody could explain this confusion. EDIT: Do I need to create a DNS for every site hosted on my server? Or just make a A Host/Record? Thanks guys

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• How to serve Rails application with Passenger/Apache without domain name?

  - by grifaton

  I am trying to serve a Rails application using Passenger and Apache on a Ubuntu server. The Passenger installation instructions say I should add the following to my Apache configuration file - I assume this is /etc/apache2/httpd.conf. <VirtualHost *:80> ServerName www.yourhost.com DocumentRoot /somewhere/public # <-- be sure to point to 'public'! <Directory /somewhere/public> AllowOverride all # <-- relax Apache security settings Options -MultiViews # <-- MultiViews must be turned off </Directory> </VirtualHost> However, I do not yet have a domain pointing at my server, so I'm not sure what I should put for the ServerName parameter. I have tried the IP address, but when I do that, restarting Apache gives apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName [Sun Jan 17 12:49:26 2010] [error] VirtualHost *:80 -- mixing * ports and non-* ports with a NameVirtualHost address is not supported, proceeding with undefined results apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName [Sun Jan 17 12:49:36 2010] [error] VirtualHost *:80 -- mixing * ports and non-* ports with a NameVirtualHost address is not supported, proceeding with undefined results and pointing the browser at the IP address gives a 500 Internal Server Error. The closest I have got to something sensible is with <VirtualHost efate:80> ServerName efate DocumentRoot /root/jpf/public <Directory /root/jpf/public> AllowOverride all Options -MultiViews </Directory> </VirtualHost> where "efate" is my server's host name. But now pointing my browser at the server's IP address just gives a page saying "It works!" - presumably this is a default page, but I'm not sure where this is being served from. I might be wrong in thinking that the reason I have been unable to get this to work is related to not having a domain name. This is the first time I have used Apache directly - any help would be most gratefully received!

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• PC won't boot after hanging during Windows 8 automatic repair [closed]

  - by Mun

  I've got a custom built PC using an ASUS P5E motherboard and Intel Q6600 CPU. I plugged in my mp3 player to the USB port yesteday, and when I came back to the machine after about an hour or so, the Windows 8 automatic repair message was on the screen. It seemed to stick there for an hour, after which I decided to just hit reset and try and figure out what was going on. However, the machine rebooted to a black screen before even getting to the BIOS, with the monitor lights just blinking indicating there was no signal. Tried powering down completely, waiting a few minutes and then powering back up again with no difference; black screen with monitor lights blinking. Tried leaving it on for a while and then pinging from another machine or accessing it via something like LogMeIn, but everything showed the machine as being offline. There were also no error beeps or anything like that. Also tried unplugging all of the memory and rebooting and that also caused no error beeps. Removed one of the display cards and left the other one in there, and still only a black screen. I'm inclined to think that the motherboard or CPU is fried, but there is no indication of damage on any components and the CPU fan seems to be working fine as it always has, so overheating seems unlikely. It's also plugged into a surge protector. The motherboard also has a green light which still lights up. As everything was still working fine before hitting the reset button during Windows 8 automatic repair screen, at which point everything stopped working, it seems unlikely that this problem is down to component failure. Has anyone else experienced anything like this or have any ideas on what could be causing this behavior?

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• Why do I get a DegradedArray event with mdadm

  - by azera

  Hello Just so we're clear on what's happening: I bought 4 new sata 2 drives, with the intent of using them in a raid5 all drive are fully recognised by both my bios and my linux box (gentoo) I created a raid5 array, fiddled a bit with it to understand how it works, how to monitor ect At some point, this triggered a degradedarray event, even though the array is brand new. I tried to stopping the array and recreating a new array with the same drive but the new array starts degraded too. here is what I used to create it mdadm --create -l5 -n4 /dev/md/md0-r5 /dev/sdb /dev/sdd /dev/sde /dev/sdf here are the output from my /proc/mdstat and mdadm --detail --scan **mdstat** Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md127 : active raid5 sdf[4] sde[2] sdd[1] sdb[0] 4395415488 blocks level 5, 64k chunk, algorithm 2 [4/3] [UUU_] [>....................] recovery = 2.8% (41689732/1465138496) finish=890.3min speed=26645K/sec unused devices: <none> **detail** ARRAY /dev/md/md0-r5 metadata=0.90 spares=1 UUID=453e2833:81f22a74:64188b84:66721085 As such I have a couple questions: does a raid5 array always start in degraded mode at first ? why does sdf have the number 4 between bracket instead of 3, why does it see a spare disk and why is the 4th drive marked with _ instead of U ? (bad configuration ?) How can I recreate the array from scratch, do i have to format each drive on its own before recreating it ? Thanks for any help, I'm not sure about what I should do at the moment

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