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• Removing Phantom Registry Entries

  - by shedd

  First, some background: I'm trying to install an HP OfficeJet 6500. I've got the printer setup on my network fine, but the driver software installation on Windows XP (SP3) is a PITA. The installation program keeps dying with the following error: Product: Network -- Error 1324. The folder path 'WD Sync Data' contains an invalid character. WD Sync Data is a program on external Western Digital harddrives, which I used to use on this computer, but no external drive is current mounted. I've searched my registry for those keywords, but haven't found anything. I also ran CCleaner on the registry just to make sure, but no loose ends detected there, either. There are a number of Google results for the error, but no solutions. One post pointed me to the Windows Installer Cleanup Utility, but this utility doesn't even run - it dies with the same error before even starting. Any thoughts on where I could look to clean up this invalid character so I can get the HP installation wizard to successfully run? Many thanks in advance!

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• Why host and vmware guests fail to get MAC of each other?

  - by Georgiy Nemtsov

  I have Windows 7 64bit host running VmWare Workstation 8 with two CentOS 6.3 guests. All guests adaptors are bridged with statically assigned ip's. Connectivity bitween host and guests was fine for many days running this setup. And today while I was working suddenly host and guests became unreachable for each other. While both host and guests could connect to internet and connect to other mashines in my networks. On guests arp -a showed for host ip address: ? (192.168.1.3) <incomlete> on eth0 On host arp -a showed for guests ip 192.168.1.19 00-00-00-00-00-00 192.168.1.20 00-00-00-00-00-00 All other arp records was OK. Deleting arp-caches didn't help neither on guests nor on host. After that I disabled and reenabled network adaptor on my Windows 7 host. And the problem was gone. arp -a now shows correct MACs on all instances. As I suppose the issue was about expiry of arp cache. For some reason host and guests couldn't get their MACs. Hope somebody knows what it is all about? I am preparing guests to work in production and don't want to face such problems in future! Also I was supprised while investigating this issue from another mashine that could connect both on guests and host. On that mashine arp -a showed same MAC for host and two guests.

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• 2.6.9 Kernel on virtual server (non upgradable) - any expected problems?

  - by chris_l

  Hi, I'm considering to rent a virtual server (for me personally). The product I'm currently looking at offers IMO fair pricing, very good hardware etc. The only problem is, that I won't be able to do an upgrade to a newer kernel than 2.6.9 (running Debian Etch). Also, I can't install my own kernel modules. (The server runs with Virtuozzo, so as far as I understand it, it just does some chroot instead of a real virtualization (?)) I want to run GlassFish, Postgres, Subversion, Trac and maybe some other things on it. It will also have to employ a firewall, and provide OpenSSL for https. Ideally, it would also be able to do AIO (asynchronous IO), which could speed up some server I/O. Should I expect problems with that old kernel version, in conjunction with the software I want to install (I'd like to use current versions of the software)? One thing I already found out, is that you can't do everything with iptables, since some kernel modules are missing/things are not build into the kernel. GlassFish v3 appears to run fine at first glance. I was able to test the server for a few hours. Installing my whole setup wasn't feasible in that time, but what I can say is, that it's amazingly fast for an entry-level vserver, especially hard disk and network performance (averaging at ca. 400MBit/s). So if the kernel won't be a problem, I'd really like to take it. Thanks, Chris PS Exact kernel version: 2.6.9-023stab051.3-smp

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• Wireless Internet Connection Sharing in Ubuntu

  - by klutch2

  As the title states, I need to share a wireless connection with a laptop running Ubuntu as the AP. The setup will be as follows: Corporate WiFi <<== Laptop <<== Other Devices i.e. (iPad, iPhone) I want to be able to connect the "Other Devices" via WiFi to the laptop. I have thought of setting up an ad-hoc network by connecting to the Corporate WiFi and then setting up a new network and hoping the connection to both would stay, but that doesn't seem to work. If I set up the ad-hoc network by itself, I can see it from my "Other Devices". The reason I need this is because for some reason, my iPad and my iPhone will not connect to my corporate WiFi and I need to use them so I want to use my laptop to share the connection and act as an AP for my "Other Devices". My laptop is a Chrome CR-48 running Ubuntu and as some of you might know, it does not have an ethernet port, so having a wired connecting and then setting up a network is out of question. I want to connect to the Corporate WiFi and share that connection by having the laptop act as an AP for other devices.

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• Remote Desktop svchost (networkservice) & lsa.exe high cpu usage, hangs on welcome screen

  - by Rohan1

  We have deployed an RDS Farm with 12 virtual RDS servers using Hyper V. Currently some users are not able to log on. After passing credentials to the connection broker, the session hangs on the "Welcome" screen. Using resource monitor we've seen that svchost (with the "networkservice" service) has a CPU usage of 50%, when viewing the wait chain on the process it displays that it's waiting for a lsa.exe to finish. We can't kill any of the users processes, even when trying with taskkill /f. Suspending lsa.exe did work but didn't have any effect. The networkservice also couldn't be restarted. Also, if this happens, the current users logged on to the RDS server can't be displayed. Task manager crashes when viewing the users, RDS service manager crashes when viewing the users (even remotely) and the cmd command "query session" doesn't work. No antivirus is installed on the RDS server. The only thing we can do is rebooting the server, which is not an option because of the fact that other users are in active sessions. Does anyone have ANY idea what's going on? We didn't encounter this in our pre-production setup.

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• What's Keeping My Computer Awake?

  - by phantomdata

  Hey guys, First the question; How do I figure out what is preventing my Windows 7 computer from going into sleep mode? Second; some background... I've been struggling with this for a few days and am utterly perplexed. I setup sleep mode on my Windows 7 PC a few weeks ago, and all was well. The PC would sleep as expected and I was snuggly in knowing that my computer was saving power and some wear and tear on the components (we'll leave the 'is it better to sleep' debate for another thread/day, please don't start it). Well, I noticed the other night that my system stopped ever going to sleep. I set the sleep time down to 1 minute and wandered fully away from the PC (ensuring that no errant mouse or keyboard movements would occur) and the PC never went to sleep. I've also observed this over longer intervals as well, such as overnight. I have sleep mode enabled, of course "multimedia settings - When Sharing Media" is set to allow the computer to sleep. "powercfg -lastwake" show nothing of interest, since it never goes to sleep and can't wake up. "powercfg /requests" shows 3 entries - all "[DRIVER] ?". I assume that 2 of these are my mouse and keyboard - as I've recently used them to run the powercfg command. I'm at a loss for the third though. I've unhooked all USB peripherals save for my keyboard and mouse. Wake on LAN is disabled in my BIOS. I know that you can disable all apps from waking/preventing sleep - but I want the ability to remain for those apps that do legitimately need to keep the system awake. So; does anyone know of a way to figure out what the 3rd phantom "[DRIVER] ?" is in powercfg /requests?

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• How to set up multi users on dev server with git and github

  - by Derek Organ

  I'm working on lamp application. We have 2 servers (Debian) Live and Dev. I constantly work on dev main to add new features and fix bugs. When happy all works well I scp the relevant code to the Live system. Database (mysql) is local to each machine. Now this is pretty basic setup really and I want to improve the workflow a bit. I use git and github for version control. Admittedly I've only really used one branch. Their can be 3 different developers who work on the code at different times. We all use the same linux username to connect to the dev server and edit the code directly when needed. I usually then commit and push the code at the end of the day to github. One thing to bare in mind is it isn't easy to run this code on a local machine as there are many apache and subdomain configurations that wouldn't work on a local machine so it is important to work on the dev server not locally. I need to create a new process because we need to have a main trunk now and a branch with a big code re-write. What is the best way to do this. Should I create different unix logins for each developer and set up different working areas on the dev server for there changes? e.g. /var/www/mysite_derek /var/www/mysite_paul /var/www/mysite_mike my thinking is they can do a pull from the main branch and then create there own branch and merge it back in. I'm not sure how this will work though with git locally and with github. will i need to create different github user accounts as well. I'd like to do this the 'right' way and future proof for having lots of potential developers but I also don't want to over complicate it. I simple and elegant solution is preferred. any recommendations or suggestions?

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• how to export VARs from a subshell to a parent shell?

  - by webwesen

  I have a Korn shell script #!/bin/ksh # set the right ENV case $INPUT in abc) export BIN=${ABC_BIN} ;; def) export BIN=${DEF_BIN} ;; *) export BIN=${BASE_BIN} ;; esac # exit 0 <- bad idea for sourcing the file now these VARs are export'ed only in a subshell, but I want them to be set in my parent shell as well, so when I am at the prompt those vars are still set correctly. I know about . .myscript.sh but is there a way to do it without 'sourcing'? as my users often forget to 'source'. EDIT1: removing the "exit 0" part - this was just me typing without thinking first EDIT2: to add more detail on why do i need this: my developers write code for (for simplicity sake) 2 apps : ABC & DEF. every app is run in production by separate users usrabc and usrdef, hence have setup their $BIN, $CFG, $ORA_HOME, whatever - specific to their apps. so ABC's $BIN = /opt/abc/bin # $ABC_BIN in the above script DEF's $BIN = /opt/def/bin # $DEF_BIN etc. now, on the dev box developers can develop both ABC and DEF at the same time under their own user account 'justin_case', and I make them source the file (above) so that they can switch their ENV var settings back and forth. ($BIN should point to $ABC_BIN at one time and then I need to switch to $BIN=$DEF_BIN) now, the script should also create new sandboxes for parallel development of the same app, etc. this makes me to do it interactively, asking for sandbox name, etc. /home/justin_case/sandbox_abc_beta2 /home/justin_case/sandbox_abc_r1 /home/justin_case/sandbox_def_r1 the other option i have considered is writing aliases and add them to every users' profile alias 'setup_env=. .myscript.sh' and run it with setup_env parameter1 ... parameterX this makes more sense to me now

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• How to set up multiple video cards in Windows XP

  - by Swish

  All I am trying to do is run a three monitor setup, two widescreens on the good card at high res and a third smaller monitor at 1024x768 that I watch continuously updating info in. I have a Dell Vostro 200 with an HIS Radeon HD 4670 video card in the PCI-e slot. I need an additional video card that will work in an available PCI slot. I Had a Nvidia GeForce 5200 that was installed but due to what I'm assuming was a compatible driver issue (because it was Nvidia not ATI) it wouldn't run at more than 640x480 4bit color when installed simultaneously with the HIS card. Previously I used the Nvidia with the onboard Intel video to run a third monitor, but now that the HSI uses PCI-e the onboard has to be disabled. I tried a Radeon 9200 PCI card that I found (microsoft made I think) with it and only that or the HIS card could be enabled at the same time. When both were in the HIS card said "The device cannot start". SO, based on the fact that I got the Nvidia to work (although very poorly) with the new HIS Radeon HD 4670 PCI-e I know it's possible, just don't know what type of card I need to use. Any ideas?

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• One Apache server, multiple clients - best practices for config files?

  - by OttaSean

  First time user; please be gentle. :-) (And if you don't like my question I'd be grateful for a comment as to why...) I am doing a contract at a government server shop that provides web services for multiple client groups in other areas of the government. My employer has asked me to look into how other shops, in similar situations, handle configuration files, and whether there are any best practices on the subject. I'm pretty sure there are lots of installations out there running multiple VirtualHosts out of one Apache installation, but surprisingly I couldn't find anything online about how people handle config file layout, so was hoping some of you wise folks on ServerFault might have some thoughts or pointers for me. The current setup - which seems logical to me - is that each client site has its own directory off the root - so: /client/tps-reports/ /client/silly-walks/ /client/ministry-of-magic/ and so on - and each of those directories has a /htdocs, /cgi-bin, and /conf (among others). The main /etc/apache/httpd.conf only contains Include statements (and lots of comments), the last of which is: Include /etc/apache/vhosts/*.conf The vhosts directory contains symlinks: tpsrept.conf - /client/tps-reports/conf/tpsrept.conf sillywk.conf - /client/silly-walks/conf/sillywk.conf mom.conf - /client/ministry-of-magic/mom.conf Each of those .conf files contains the actual NameVirtualHost definition and a gigantic <VirtualHost 192.168.12.34> stanza - which contains all the stuff about the specific site. The idea is that clients have access to what's in their own /client/xx directory, so they can change stuff in the section of the config that is relevant to them. As I mentioned above, that seems fairly logical to me, but I'm wondering if any of you wise folks are aware of potential gotchas with this sort of layout, or any other thoughts on why it is or isn't a good idea. In particular, how do other places do it? Is there a "best practice" for this sort of thing? Many thanks in advance for your time and any thoughts you all might have.

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• Receiving and processing SMS messages through a script?

  - by ShankarG

  I am attempting to setup a system to receive and process SMS messages automatically. The system is intended for use in a context (an unfunded migrant workers' union in India) where both finances and sysadmin skills are extremely constrained (I would be the only person, in the near future, who would be administering the system). The intention is to make some functions - registration of members, generation of ID cards, communication of alerts and other information - easier. However, for receiving and sending SMS, I have not been able to find any email to SMS or other kind of gateway that functions in India. Perhaps there is one (edit: apparently Clickatell does have an India service, but the prices appear astronomical). If not, can one rely on a USB mobile modem (such as those provided by many mobile providers in India)? It seems like, with utilities such as gammu or bitpim, SMS operations on such a modem could be scripted. Is this actually feasible, though? Thanks in advance for your thoughts and suggestions. edit: Original first question removed since the two questions had little to do with each other. The original first question has been asked separately here

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• 20 1TB drives vs. 10 2TB drives in RAID5/6 server

  - by Hunter

  Hi everyone, I will be setting up a server at work and I need some advice on some details. The setup will be one blade-type server (8-core, 16GB RAM) with two subsystems - one for the main storage the other to back it up. I'm shooting for a 20TB array (I know it'll be less after formatting and parity drives). So is there any advantage one way or the other with either 20 1TB drives or 10 2TB drives? I'm not sure right now how many controllers I should have either (in the quote I have is a dual-port controller). I would think two controllers for a server of this size would be a better choice than the dual-port controller (but I really don't know). And would an array of this size have any performance issues in RAID 5 or 6 (I know RAID 5 or 6 are "slower" because of all the parity calculations). Also, these will be either WD RE3 (1TB) or the RE4 (2TB). Oh, also, for the backup array would it be ok to use the WD 2TB green drives (also in RAID5 or 6)?

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• PHP mail() function stopped working on Windows 2008 R2 IIS 7.5. Why?

  - by Karl

  PHP 5.3.13 and as noted IIS 7.5. PHP mail() was working fine until I did 3 things (at the same time). (a) added memory to the server taking it from 4gb to 5gb; (b) ran Windows Update and applied all available updates; (c) removed SQL server installation. Windows 2008 R2 SMTP server still works fine. I know this because I can drop a file in the pickup folder and the mail is delivered. This PHP test script: <?php $to='my_name@another_domain.com'; $subject='Test email using PHP'; $message='This is a test email message'. "\r\n"; $headers='From:[email protected]' . "\r\n" . 'Reply-To:[email protected]' . "\r\n" . 'X-Mailer: PHP/' . phpversion(); mail($to, $subject, $message, $headers, '[email protected]'); ?> creates this entry in the PHP log file: mail() on [C:\www\pgs.com\store\admin\test_php_mail.php:1]: To: my_name@another_domain.com -- Headers: From:[email protected] Reply-To:[email protected] X-Mailer: PHP/5.3.13 PHP's mail.log. When using PHP now, I never see a file dropping on the IIS pickup folder. And on other thing, when using previouly working features on the site (such as password recovery), there is no entry made in the mail.log. (The mail log has just been setup to help solve this problem.) How do I fix this? Or at least how do I diagnose the problem? Thanks.

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• Is NFS capable of preserving order of operations?

  - by JustJeff

  I have a diskless host 'A', that has a directory NFS mounted on server 'B'. A process on A writes to two files F1 and F2 in that directory, and a process on B monitors these files for changes. Assume that B polls for changes faster than A is expected to make them. Process A seeks the head of the files, writes data, and flushes. Process B seeks the head of the files and does reads. Are there any guarantees about how the order of the changes performed by A will be detected at B? Specifically, if A alternately writes to one file, and then the other, is it reasonable to expect that B will notice alternating changes to F1 and F2? Or could B conceivably detect a series of changes on F1 and then a series on F2? I know there are a lot of assumptions embedded in the question. For instance, I am virtually certain that, even operating on just one file, if A performs 100 operations on the file, B may see a smaller number of changes that give the same result, due to NFS caching some of the actions on A before they are communicated to B. And of course there would be issues with concurrent file access even if NFS weren't involved and both the reading and the writing process were running on the same real file system. The reason I'm even putting the question up here is that it seems like most of the time, the setup described above does detect the changes at B in the same order they are made at A, but that occasionally some events come through in transposed order. So, is it worth trying to make this work? Is there some way to tune NFS to make it work, perhaps cache settings or something? Or is fine-grained behavior like this just too much expect from NFS?

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• Windows 7 Sharing issue on RAID 5 Array(s)

  - by K.A.I.N

  Greetings all, I'm having a very odd error with a windows 7 ultimate x64 system. The network system setup is as follows: 2x XP Pro 32 Bit machines 1x Vista ultimate x64 machine 2x Windows 7 x64 Ultimate machines all chained into 1x 16 port netgear prosafe gigabit switch, the windows 7 & vista machines are duplexed. Also there is a router (netgear Rangemax) chained off the switch I am basically using one of the windows 7 machines to host storage & stream media to other machines. To this end i have put 2x 3tb hardware RAID 5 arrays in it and assorted other spare disks which i have shared the roots of. The unusual problems start when i am getting Access denied, Please contact administrator for permission blah blah blah when trying to access both of the RAID 5 arrays but not the other stand alones. I have checked the permission settings, i have added everyone to the read permission for the root, i have tried moving things into sub directories then sharing them. I have tried various setting combinations in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa and always the same. I have tried flushing caches all round, disabling and re-enabling shares & sharing after restart as well as several other things & the result is always the same... No problem on individual drives but access denied on both the RAID arrays from both XP & Vista & Windows 7 machines. One interesting quirk that may lead to an answer is that there is no "offline status" information regarding the folders when you select the RAID 5s from a windows 7 machine yet there is on the normal drives which say they are online. It is as if the raid is present but turned off or spun down but as far as i was aware windows will spin an array back up on network request and on the machine itself the drives seem to be online and can be accessed. Have to admit this has me stumped. Any suggestions anyone? Thanks in advance for any fellow geek assistance. K.A.I.N

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• My server is taking too long to respond when I connect to it outside the local network [closed]

  - by Buzu

  I have my local server online most of the time because it is easy for clients to access a url and see how their project is coming along. They can see updates in real time. However, I got a message from one of my clients saying that the server was not responding. I have a hosts file, and in that file I have my server's address pointed to the local ip. This is because some problem with the ftp. Due to this setup, I had not noticed that the server was not accessible from outside the local network. The address is http://imbuzu.dyndns.info SSH works fine, I can connect from my windows machine to the server, but HTTP does not. The server is taking too long to respond. Looking at the logs, I see that the last incoming connection to the server from outside the network is this: 77.242.153.180 - - [04/Dec/2012:12:11:01 -0800] "\xce\x89\x8d\x85b\ro" 400 317 "-" "-" I'm going to restart the server, but I doubt that will have any effect on it. --EDIT-- I restarted the server, and it did not help. Also, I pinged the server and it seems to be resolving correctly.

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• what is best multi-server configuration with OpenVPN

  - by sebut

  We have a number of Database severs running MongoDB on Debian plus a number of Application servers also on Debian. The db servers hold replicating db clusters, so they need to talk to each other. Application servers need to talk to all db servers (for reasons of fault tolerance). The servers are potentially spread across multiple hosting centers, so we need secure channels between all servers. The number of servers is bound to grow, so we need a VPN solution that's easy to maintain and expand. This is why I feel that SSH that we use for testing might not be up to the task and OpenVPN seems the way to go. I have ruled out TAP, since I understand that this would mean all traffic going to all the servers - perhaps this is a misunderstanding and TAP acts more like a switch? With TUN devices I imagine that all DB servers would live in their own separate subnet, they would also need a client configured to be able to connect to each of their peers. The application servers could live in a common subnet range with a client config only. Does this sound like a reasonable setup? Strangely, on the web I did not find anything about multi-server with OpenVPN. Thanks for all insights and ideas!

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• How to chain GRUB2 for Ubuntu 10.04 from Truecrypt & its bootloader (multi boot alongside Windows XP partition)?

  - by Rob

  I want Truecrypt to ask for password for Windows XP as usual but with the standard [ESC] option, on selecting that, i.e via Escape key, I want it to find the grub for the (unencrypted) Ubuntu install. I've installed Windows XP on the 120Gb hard drive of a Toshiba NB100 netbook then partitioned to make room for Ubuntu 10.04 and installed that after the Windows XP install. When I encrypt Windows XP, Truecrypt will overwrite the grub entry in the master boot record (MBR), I believe (?) and I won't be able to choose between XP and Ubuntu anymore. So I need to restore it back. I've searched fairly extensively for answers on Ubuntu forums and elsewhere but have not yet found a complete answer that covers all eventualities, scenarios and error messages, or otherwise they talk of legacy GRUB and not GRUB2. Ubuntu 10.04 uses GRUB2. My setup: Partitions: Windows XP, NTFS (to be encrypted with Truecrypt), 40Gb /boot (Ext4, 1Gb) Ubuntu swap, 4Gb Ubuntu / (root) - main filesystem (20gb) NTFS share, 55Gb I know that the Truecrypt boot loader replaces the GRUB when boot up because I've already tried it on another laptop. I want boot loader screen to look something like the usual: Truecrypt Enter password: (or [ESC] to skip) password is for WindowsXP and on pressing [ESC] for it to find the Ubuntu grub to boot from Thanks in advance for your help. The key area of the problem is how to instruct Truecrypt when escape key is pressed, and how the Grub/Ubuntu can be made visible to the truecrypt bootloader to find it, when the esc key is pressed. Also knowing as chaining.

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• moving from WinXP to WinServer in VmWare

  - by Alex

  I have a Vmware machine for.Net application testing. Current setup: Host OS: win7 Guest OS: Right now the guest OS is Win Xp Pro x64, which runs great with just 1 gigabyte of RAM and 10 gigs of disk space. * This part can be skipped * As I said, there was a program that I needed to test, but unfortunately, by default, Vmware installs crappy display drivers(called SVGA II) on XP machines and there is NO way to upgrade them! This resulted in my program's error (the program used SlimDX (DirectX wrapper) to do some stuff..). Eventually I found out that display drivers most certainly is the problem. For example, Windows 7 virtual machine uses SVGA 3D drivers and I have NO problems running my SlimDX-based program. Now, regarding Windows Server 2008! Apparently, WDDM driver is supported by WS2008, which means that I'll be able to install SVGA 3D and to test my DX apps. * end of skip * The questions are: Will WS2008 be as smooth with just 1 gig of RAM just like Win XP was? Will 10 gigs of HDD be enough? Or the server requires more? Will I be able to install .Net ver. 4 on WS2008? Are there any limitations that I need to be aware of as a .Net programmer? EDIT: I was hoping that WS2008 is XP-based, not Vista-vased/W7-based. In comparison, W7 virtual machine with 2 gigs of RAM and 2 proc cores nearly kills my Host OS. Whereas, WinXp runs extremely fast even with 1 core and 1 gig of RAM. That's the main reason why I want to try WS2008..

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• Apache Virtualhosts with PHP and custom logs - how to isolate PHP errors?

  - by Repox

  I'm trying to setup a simple hosting enviroment for my application on an Ubuntu server. I created a virtualhost like this: <VirtualHost *:80> ServerAdmin [email protected] ServerName www.example.com ServerAlias example.com DocumentRoot /home/owner/example.com/docs <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /home/owner/example.com/docs/> 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 /home/owner/example.com/logs/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog /home/owner/example.com/logs/access.log combined php_flag log_errors on php_value error_log /home/owner/example.com/logs/php-error.log </VirtualHost> Now, my problem is that PHP errors and warnings are thrown in the error.log - not the php-error.log as I was hoping. How can achieve this?

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• SSH with public/private key to iMac fails.

  - by bennedich

  I'm trying to connect to my iMac (server) from my macbook (client) on my LAN. Both have Mac OS X 10.6.4. Server running on a new clean install of the OS. When just activating Remote Login in System Preferences everything works fine. But when setting up ssh to only work with public/private key I get the following error messages from the server log depending on if I use a rsa passphrase or not: With passphrase (case 1): PAM: user account has expired for <myServerUserName> from 192.168.X.X via 192.168.X.Y Without passphrase (case 2): Failed publickey for <myServerUserName> from 192.168.X.X port AAAAA ssh2 This is my setup algorithm: Create a private and public key on client with command ssh-keygen -t rsa. In case 1 I also set a passphrase. Move the id_rsa.pub to the server path /Users/<myServerUserName>/.ssh/ In this folder I execute cat id_rsa.pub > authorized_keys Making sure Remote Login isn't active, I now execute sudo /usr/sbin/sshd -d on the server. Back on the client I now type ssh -v -v -v <myServerUserName>@192.168.X.Y and get prompted to accept RSA key fingerprint. This is NOT the same fingerprint as the one from when I created the private/public key (should it be?). I accept. Depending on case: CASE 1: Client gets halted for password and the response is permission denied even though correct password is given. Back on the server I can read the error message I stated above for case 1: PAM: user account has expired... CASE 2: Client gets message Connection closed by 192.168.X.Y. Back on the server I can read the error message I stated above for case 2: Failed publickey... What could possibly cause this?

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• mdadm: Replacing array with entirely new drives

  - by hellfur

  I have a server with three 500GB drives, with most of my data in a RAID5 configuration spanning the three of them. I just purchased and installed four 1TB drives, and the intention is to move off of the old drives and onto the new ones. I have enough SATA ports and power connectors to power all seven of my drives at once, so I've kept the old RAID running while I figure out what to do with the new drives. My question is: Should I create a whole new array on the 1TB drives, then move everything over and reconfigure linux to boot from the new md arrays? Or should I just expand the array, swapping out each of the three 500GBs with the 1TB, then adding the final drive? I've read up on the mdadm extending drive setup, and it makes sense, but I imagine I would use one of the drives as a full backup while I move things over, then add that drive back into the array once things are up and running on three of the 1TB drives, so there's some complication in going that route as well... I'm just not sure which is safer/recommended.

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• Disk (EXT4) suddenly empty without any sign of why

  - by Ohnomydisk

  I have a Ubuntu 10.04 server with several disks in it. The disks are setup with a union filesystem, which presents them all as one logical /home. A few days ago, one of the disks appears to have suddenly 'become empty', for lack of better explanation. The amount of data on the /home mount almost halved within minutes - the disk appears to have had just over 400 GB of data prior to 'becoming empty'. I have absolutely no idea what happened. I was not using the server at the other time, but there are half a dozen other users who may have been (without root access and without the ability to hose a whole disk). I've ran SMART tests on the disk and it comes back clean. The filesystem checks fine (it has 12 GB used now, as some user software continued downloading after the incident). All I know is that around around midnight on October 19, the disk usage changed dramatically: The data points are every 15 minutes, and the full loss occured between captures: 2012-10-18 23:58:03.399647 - has 953.97/2059.07 GB [46.33 percent] 2012-10-19 00:13:15.909010 - has 515.18/2059.07 GB [25.02 percent] Other than that, I have not much to go off :-( I know that: There's nothing interesting in log files at that time Nobody appeared to be logged in via SSH at the time it occured (most users do not even use SSH) The server was online through whatever occured (3 months uptime) None of the other disks were affected and everything else on the server looks completely normal I have tried using "extundelete" on the disk and it didn't really find anything (some temporary files, but they looked new anyway) I am completely at a loss to what could have caused this. I was initially thinking maybe root escalation exploit, but even if someone did maliciously "rm" the disk contents, it would take more than 15 minutes for 400 GB?

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• What could cause a dual-monitor PC to suddenly stop using one of the screens?

  - by raldi

  I've got a dual-monitor setup using a GeForce 7900GT that was working fine for over a year... then suddenly, only one of the screens works. It's not OS-related, because even on startup, only one screen displays the BIOS checks. In the past, both screens would show it together. I didn't change anything to trigger this The monitor that gets a signal is random -- sometimes the one on the left goes black, sometimes the one on the right. The monitors and their cables are good -- I can switch both or either, and I get a signal just fine. They're plugged in, too. It's not the video card, either -- I have an identical 7900GT in another machine, and swapping the two didn't fix anything. It's not dust on the motherboard -- I pulled everything out, cleaned it off, checked for obvious damage, put it all back together, and no change. My next two steps are going to be to reset the CMOS info and to try swapping out the motherboard. Before I do that, does anyone have any other ideas?

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• DNAT from localhost (127.0.0.1)

  - by pts

  I'd like to set up a TCP DNAT from 127.0.0.1, port 4242 to 11.22.33.44, port 5353 on Linux 3.x (currently 3.2.52, but I can upgrade if needed). It looks like the simple DNAT rule setup doesn't work, telnet 127.0.0.1 4242 hangs for a minute in Trying 127.0.0.1..., and then it times out. Maybe it's because the kernel is discarding the returning packets (e.g. SYN+ACK), because it considers them Martian. I don't need an explanation why the simple solution doesn't work, I need a solution, even if it's complicated (e.g. it involves creating may rules). I could set up a usual DNAT from another local IP address, outside the 127.0.0.0/8 network, but now I need 127.0.0.1 as the destination address. I know that I can set up a user-level port forwarding process, but now I need a solution which can be set up using iptables and doesn't need helper processes. I was googling for this for an hour. It was asked multiple times, but I couldn't find any working solutions. Also there are many questions about DNAT to 127.0.0.1, but I don't need that, I need the opposite.

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