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• Cross-Forest Trust

  - by cdalley

  I am looking at testing a cross-domain trust we can have two domain controllers (with different forests and domain names) setup so we can move everyone onto the new domain. We do NOT run exchange on site and we do not have any links to O365 to AD currently. Onto the problem: I have setup two DCs in a Virtual Machine: They are on the same network 192.168.0.* The Windows 2003 server: Name: OLDSRVR "Clone" of our current Domain Controller IP: 192.168.0.1 Domain: internal.test.com The Windows 2012 server: Name: ADCTEST01 Brand new domain setup from scratch separate to internal.test.com Domain: internal.test2.com IP: 192.168.0.2 OLDSRVR can only see ADCTEST if it has dynamic IP set. If I set a static IP it cannot see it. If I try using the dynamic IP and try to join it gets to the end then complains "??The trust relationship between this workstation and the primary domain failed" Any ideas?

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• How to repair Java in Ubuntu after trying to switch to Java 6 using update-java-alternatives

  - by Kau-Boy

  I tried to switch from Java 5 to Java 6 using the "update-java-alternatives" command like explained on this page: https://help.ubuntu.com/community/Java But afterwards I get the following error when I tried to execute java: root@webserver:~# java Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine. I also tried to reinstall the java binaries using "apt-get" but I didn't succeed reinstalling it. I would like to post the "apt-get" errors, but unfortunately I don't know how to print out the error messages in English and not in German. My system is a Ubuntu 8.04 ROOT server.

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• How to write a ProxyPass rule to go from HTTPS to HTTP in IIRF

  - by Keith Nicholas

  I have a server which is running a web app that self serves HTTP. I'm wanting to use IIS6 (on the same server) to provide a HTTPS layer to this web app. From what I can tell doing a reverse proxy will allow me to do this. IIRF seems like the tool to do this job. There are no domain names involved.... its all ip numbers. So I think I want :- https:<ipnumber>:5001 to send all its requests to the same server but on a different port and use HTTP ( not exposed to the net ) http:<ipnumber>:5000 but not sure how to go about it with IIRF, I'm not entirely sure how to write the rules? I think I need to make a virtual web app on 5001 using HTTPS? then add a rules file.

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• How can I set up VLANs in a way that won't put me at risk for VLAN hopping?

  - by hobodave

  We're planning to migrate our production network from a VLAN-less configuration to a tagged VLAN (802.1q) configuration. This diagram summarizes the planned configuration: One significant detail is that a large portion of these hosts will actually be VMs on a single bare-metal machine. In fact, the only physical machines will be DB01, DB02, the firewalls and the switches. All other machines will be virtualized on a single host. One concern that has been is that this approach is complicated (overcomplicated implied), and that the VLANs are only providing an illusion of security, because "VLAN hopping is easy". Is this a valid concern, given that multiple VLANs will be used for a single physical switch port due to virtualization? How would I setup my VLANs appropriately to prevent this risk? Also, I've heard that VMWare ESX has something called "virtual switches". Is this unique to the VMWare hypervisor? If not, is it available with KVM (my planned hypervisor of choice)?. How does that come into play?

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• Set global handling for PHP scripts in NGINX + PHP-FPM

  - by Radio

  I have to define fastcgi_pass for every virtual host. How do I define it global-wise? server { listen 80; server_name www.domain.tld; location / { root /home/user/www.domain.tld; index index.html index.php; } location ~ \.php$ { fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME /home/user/domain.tld$fastcgi_script_name; include fastcgi_params; } }

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• Installing 2 DDR3 Sticks in MB with 4 Slots

  - by The Sasquatch

  Hey everyone, I just put together my first system that uses DDR3 memory. The motherboard I got is an ASUS M4A77T/USB3 and it has 4 DDR3 RAM slots. Looking in the manual for the MB it doesn't say anything about how to install the RAM as far as matching the pairs goes. I have 2 4GB sticks of RAM, and whether I put the sticks next to each other (of the 4 RAM slots, there are two blue ones next to each other and 2 black ones next to each other) or space them apart, The BIOS still shows that I have 8GB installed. I have been getting an IRQL_NOT_LESS_OR_EQUAL BSOD error, and have read in some other places that it could be hardware/RAM related. Does the RAM need to go in the A1, A2 slots (different colored but both A), or the A1 B1 slots? (A1 B1 are both the lovely blue color.) Any help would be awesome. THANKS!

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• How can one-handed work in Emacs be eased?

  - by N.N.

  My right hand is temporarily immobilized and I would like to do some minor work in Emacs, mostly in Org-mode, but also in AUCTeX. Are there ways to ease one-handed work in Emacs, such as some mode or particular work flow? For instance I noticed that for undoing it is easier to press C-x u than C-_ and that it is easier to mark text with methods involving C-Space than with combinations of S- and movement commands. I have found http://stackoverflow.com/questions/2391805/how-can-i-remain-productive-with-one-hand-completely-immobilized but that is not exactly what I am asking for. I want to ease whatever little time spent one-handed in Emacs (not in general) and this is also interesting for situations where there is no injury involved, such as when one hand is occupied. I do realize that I should avoid unnecessary strain. I am using GNU Emacs 23.3.1 in Ubuntu 11.04.

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• Active node stops resources when pasive node is shutdown

  - by Wakaru44

  2 nodes, active/pasive. 2 resources, a virtual ip, openLdap, and the nfs mount where openldap saves the data. When both nodes are up, things worked fine. You could move resources away and put the active in stanby. But when i rebooted the passive node, ( with the resources in the active node), and the passive node loses conectivity, all the resources in the active where stopped by pacemaker. I'm reading the documentation right now, but I just need a little quick tip to figure what could be hapenning here. Im using: corosync pacemaker RHEL 6

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• unusual webpage access problem

  - by user28163

  This is one of the weirdest problems I've ever seen and I'm out of ideas. I cannot access a couple of websites from my home pc (for 3-4 days now), or at least they go really really slow ~700b/s I can access these same websites fine from my laptop from same IP address. - The websites originate from different countries and are huge popular sites. - I have tried both my PC's network cards. - I have reformatted my PC. - I have reset my router to factory settings. - I have created virtual computers on my PC, and from inside those I cannot access the webpages. - I have flushed my dns. - I tried specifying my dns server addresses to 8.8.8.8 and 8.8.4.4. I can only access the webpages using my PC, if I first connect to an outside VPN. Again, these sites work fine on the 2 other pcs in this house (same ISP and internet connection). help plz :)

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• Need to Extend Volume

  - by Roger Galindo

  Ok Here is where I am... I have an HP Proliant with 8 Drives configured as RAID5, and C:\Drive Disk 0 and D:\ drive Disk 1. I need to add more space to Disk 0 (C:) and have 150GB available on Disk 1 (D:). I tested the Disk Mgmt on D:\ and freed up 4GB which now shows to be Unallocated. How do I add the 4GB of Unallocated to the c:\? When I click on C:\ the Menu shows "Extend Volume" as Grayed Out not Black but the D:\ Drive shows Extend Volume as selectable/black.

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• Thoughts on Apache log file sizes?

  - by Nathan Long

  Do you place any limits on the size of Apache log files - access.log and error.log? Specifically, can you give: Reasons to limit log file sizes Disk space Any other? Reasons NOT to limit log file sizes Research into performance issues or security breaches Any other? Methods of doing so Cron job that periodically deletes the file, or the first N lines? Any other? Anything you might salvage before deleting For example, grep out how many times a file was downloaded before deleting the access logs I'd like get the thoughts of experienced sysadmins before I do anything. (Marking as community wiki since this may be a matter of opinion.)

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• Postfix/dovecot remove LDAP user

  - by dove221

  I have to remove or blacklist an LDAP/dovecot user. The authentication is setup from active directory what I cannot manage so I thought there should be a way at least to disable this specific user on the mailserver locally. # Virtual Accoutns - LDAP - MS AD virtual_mailbox_maps = ldap:/etc/postfix/ldap_mailbox_maps.cf virtual_alias_maps = ldap:/etc/postfix/ldap_alias_maps_redirect_true.cf ldap:/etc/postfix/ldap_alias_maps_redirect_false.cf ldap:/etc/postfix/ldap_mailbox _groups.cf virtual_mailbox_domains = domain.com virtual_uid_maps = static:1000 virtual_gid_maps = static:1000 virtual_transport = dovecot dovecot_destination_recipient_limit = 1 Anybody knows how to do it? I followed this guide for disabling 1 user through postfixes access file: http://www.cyberciti.biz/faq/howto-blacklist-reject-sender-email-address/ Unfortunately it doesn't work. It's like the settings stored in LDAP are overruling the access rule. Instead of postfix rejecting the mail it keeps accepting it. Thanks!

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• How to combine wildcards and spaces (quotes) in an Windows command?

  - by Jan Fabry

  I want to remove directories of the following format: C:\Program Files\FogBugz\Plugins\cache\[email protected]_NN NN is a number, so I want to use a wildcard (this is part of a post-build step in Visual Studio). The problem is that I need to combine quotes around the path name (for the space in Program Files) with a wildcard to match the end of the path. I already found out that rd is the remove command that accepts wildcards, but where do I put the quotes? I have tried no ending quote (works for dir), ...example.com*", ...example.com"*, ...example.com_??", ...cache\"[email protected]*, ...cache"\[email protected]*, but none of them work. (How many commands to remove a file/directory are there in Windows anyway? And why do they all differ in capabilities?)

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• Is there anything that can be done to make X forwarding over LAN less painful?

  - by Earlz

  I have two *nix machines that I like to remotely do graphical things sometimes with. One of those machines is my Arch Linux media server, and another is my OpenBSD router/general server. My current task was installing a Windows XP over virtual box on my media server. I preferred to do the installation from my main workstation so that I could continue to watch TV from my media server on it's "actual" display. I soon noticed that X forwarding is quite painful though, even over low-latency LAN connections. Are there any settings I can tweak to make it a bit less painfully slow, jittery, and laggy? My LAN is rather small, 100Mbit, and ping times to the other box average at about 0.15ms. Also, I know Virtualbox has a VNC mode it can use instead of doing X forwarding, but this particular task was just an example

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• Moving data to lower sectors on an SSD without defragging

  - by David Freitag

  I bought an Intel SSD drive a while back and now I want to dual-boot with it. But for some reason there are sectors near the end of the drive filled and I can’t seem to find a way to remove the data so that I can safely shrink the partition. I know I have sectors near the end full because I am using Defraggler to analyze my drive (not to defrag it). I can see what files need to be moved/deleted but short of actually deleting some drivers and/or other necessary files, I am completely stuck. This the diskmap: I am only able to shave off that last 1.72GB of space from the drive which isn’t even enough for the most minimal Linux install.

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• Why is my ethernet interface in promiscuous mode

  - by nhed

  I read that seeing a flag of M in netstat -i is the way to tell which of your interfaces is in promiscuous mode I run it and I see that eth1 is in promiscuous mode $ netstat -i Kernel Interface table Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg eth1 1500 0 1770161198 0 0 0 57446481 0 0 0 BMRU lo 16436 0 97501566 0 0 0 97501566 0 0 0 LRU This seems to be the case on all the machines I checked (All Centos6.0, both virtual and physical), any idea why ethernet devices would be in such a mode unless someone was running any pcap based app (sudo lsof | grep pcap shows nothing)? I did not see any mention of promiscuous in any of the config files (sudo grep -r promis /etc) Any ideas what puts the interface into that mode and why? p.s. most of the posts I see seem to be security related, this is not that

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• Mac OS X: pushing all traffic through a VMWare VM

  - by bj99

  I want to set up an Astaro (Sophos) UTM in a Virtual Machine. The Setup should be at the end the following: Cable Modem (one IP adress) | [Ethernet] Sophos UTM (running as VM [VMWare Fusion 5] on the MacMini) | [WIFI] Airport Express v2 (for sharing Local Network to wireless and wired clients) 1)| [WIFI] 2)| [Ethernet over Thunderbolt Ethernet Adapter]* Clients MacMini (Local File Server) *To have the Mini also protected behind the UTM So the setup process for the UTM works fine, but then the problems start: I just have one external IP (from my cable modem provider)== So if I put the VM in briged mode my Internet connection drops, because the MacMini also has its IP adress. If I put the VM to NAT mode the Mini itself is not protected by the UTM So: is there a way to hide the en0 interface(Ethernet) and the en1 interface (Wifi) from the MacMini, so that they not even appear in System Preferences Network section but are available to the VM? That way the Mini must connect to the en2 interface (Thunderbolt adapter) to make any Internet/LAN connection and I just use the given single IP from the Cable Modem. Thaks for any suggestions... Sebastian

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• Best practice for scaling a single application source to multiple nodes

  - by Andrew Waters

  I have an application which needs to scale horizontally to cover web and service nodes (at the moment they're all on one) but interact with the same set of databases and source files (both application code and custom assets). Database is no problem, it's handled already with replication in MongoDB. Also, the configuration of the servers are the same (100% linux). This question is literally about sharing a filesystem between machines so that its content is always correct, regardless of the node accessing it. My two thoughts have so far been NFS and SAN - SAN being prohibitively expensive and NFS seeing some performance issues on the second node with regards to glob()ing in PHP. Does anyone have recommended strategies or other techniques that don't involved sharding data across nodes or any potential gotchas in NFS that may cause slow disk seek times? To give you an idea of the scale, the main node initialises it's application modules in ~ 0.01 seconds. The secondary is taking ~2.2 seconds. They're VM's inside a local virtual network in ESXi and ping time between them is ~0.3ms

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• Web Folder size/quota reporting tool?

  - by nctrnl

  I am currently using a Visual Basic script to determine how big the web folders are and what quota is decided for each folder. The quota is in no way a physical limit, just a value inserted by me to decide whether a user is using too much space or not. The script does the job quite neatly and sends an html file by mail on a regular basis. The problem is that it's such a hassle to insert new quotas since I have to fiddle around with the code. A central "control panel" with an overview and ability to insert new quotas would be more suitable. Is there any software that can do the following: Scan specified folder/subfolders Report the file size and present it in some sort of interface (could be a php/mysql solution) Ability to specify a quota and see the difference value ? It is really important that the quota handling is made simple so that some non-technician can handle this.

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• Web Folder size/quota reporting tool?

  - by nctrnl

  I am currently using a Visual Basic script to determine how big the web folders are and what quota is decided for each folder. The quota is in no way a physical limit, just a value inserted by me to decide whether a user is using too much space or not. The script does the job quite neatly and sends an html file by mail on a regular basis. The problem is that it's such a hassle to insert new quotas since I have to fiddle around with the code. A central "control panel" with an overview and ability to insert new quotas would be more suitable. Is there any software that can do the following: Scan specified folder/subfolders Report the file size and present it in some sort of interface (could be a php/mysql solution) Ability to specify a quota and see the difference value ? It is really important that the quota handling is made simple so that some non-technician can handle this.

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• Ubuntu 10.10: getting appropiate monitor resolution for lcd hdtv

  - by lurscher

  I'm running Ubuntu 10.10 x86_64 version, with Nvidia 9800 GT, installed 270.41.06 Nvidia drivers following this guide. I have a LG42LH30FR LCD TV connected with the dvi link - RGB PC input I'm able to get 1024x768 resolution without overscan (I can get 1080i = 1366x768 but there is a lot of hidden screen space to the right and I don't know what to do about it). I want to get full HD I can get full HD (1080p = 1920x1080) on Windows XP 64-bit with custom resolution created with Nvidia Control Panel, from reading over xorg.conf configurations it seems I need to add a certain modeling to the monitor configuration, but I don't know where to get the appropriate options for this task any suggestions?

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• Plesk hosting on MediaTemple DV

  - by David

  Hi there, We have a MediaTemple dedicated virtual running Plesk. The problem we're having is that changing the permissions of files on the server to be writable by server owner (apache) is conflicting with the ability to upload and overwrite files via the FTP user. Here's an example, I upload a file from user "serverftp" and they own the new file in the httpdocs folder. I then change the permission of an image upload folder to the apache user to that I can upload images via a PHP script. Uploading or changing that folder with the serverftp user is then locked out. Speaking to tech support didn't get very far because there are some strange group permissions going on and it would involve me adding every single domain FTP user to the pcantl group or something similar. I'm wondering how I can easily change things so that I don't have this problem anymore.

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• windows 7 frequently crashes when running 64 bit debian on virtualbox

  - by erin c

  I've been having some hard times with Virtualbox. I use it to run 64-bit Debian guest on a Windows 7 host to be able to code for linux systems. It generally crashes when I build my code in eclipse cdt, or if I am doing some intensive operations. Should I lower the memory and core usage? Is this some sort of virtualbox problem? I upgraded to virtualbox v4.1.8 and the problem still occurs. My virtual machine instance uses 1736MB out of 4GB of ram, and I use 2 out of 8 processor cores. But still, the whole thing crashes 1 or 2 times every single day.

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• data protector red tapes

  - by Caesar

  I am using HP Data Protector A.06.11 in my organization, with HP EML E-SeriesEML library, with 4 drives using LTO-4 tapes, and i am having some problems. Yesterday I put 5 new tapes in the robot and formatted them. At that time, the robot got just those empty 5 tapes with empty space. (all the rest of the tapes are red, or with protection) Today in the morning after the night (1 backup run at night), and 2 of the new tapes are red (the properties are): Writes : 2 Overwrites : 1 Errors : 9 I format one of them, and check for each drive if the tape become red, no one of the drives do it. In the main pool properties, in media condition got: Valid for : 36 (months) Maximum overwrites : 250

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• Our GoDaddy web server is drowning in temp files!!

  - by temp file guy

  We have a virtual dedicated server with a fairly large amount of traffic. We use GoDaddy using CPanel. We have 10GIG of space of which about 80% is not our content but logs and server utilities. Godaddy support is evasive and they are trying to encourage us to migrate to new service with 15GIG. Reviewing the large files we found the following: We have a ton old TMP files at this directory. /public_html/files/TMP/FILE_PERSISTANCE_PROVIDER: (no access) some large files in these directories. /usr/local/apache/logs/ - suphp_log (220M) - access_log (7M) - error_log (5M) /usr/local/apache/domlogs/ (no access) /usr/local/cpanel/ (no access) /usr/local/cpanel-rollback /tmp Questions: What can we safely delete or truncate? How can we change permissions on files with no access to delete? Is there utility to monitor and clean up temp files Other files/programs that we can delete? thanks!

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