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• How to use X11 forwarding with putty

  - by Neuquino

  I have a VM with RHEL 5 without an X server. My host has Windows 7. I need to connect to the VM and redirect the X11 output of the commands to my host. I know that if my host were a GNU/Linux machine it would be as easy as ssh -X . I'm ussing PuTTy to connect by SSH to the VM, I tried enabling X11 forward option in PuTTy config, but nothing happened. Have you ever done this? I'm quite advanced with GNU/Linux, but a newbie with this toy of Winbug$ 7.

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• How to set up a SSH tunnel and/or reverse SSH tunnel?

  - by bossytoe

  I'm located in Shanghai China and am trying to set up an SSH tunnel (or a reverse ssh tunnel?) to my brother's server located in the States. I'm using windows xp and he has a mac. We are both using wireless routers (not sure if this is relevant). He's given me the address and password (for his server, I think), and I've downloaded myentunnel (which he recommended), but am not sure what to do now. I've also downloaded the foxyproxy add-on for mozilla (my preferred browser), and am hoping there is someone out there who can help guide a newbie like me! Thanks in advance.

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• OS choice between: Debian, gNewSense, and OpenSolaris

  - by penyuan

  I am planning to migrate from Mac OS X and Windows to either a Unix or Linux distribution, i.e. I am a Linux/Unix beginner. Right now the following caught my interest: Debian: Well established with huge repository of 20000+ apps. gNewSence: "Totally free" version of Ubuntu, so it should be more beginner friendly? OpenSolaris: Also open-source, and built on "strong" Unix base. I do mainly basic tasks such as web browsing, office work, maintaining big photo collection, and a little bit of programming. Questions: How "free" are each of these distributions compared to each other, is this whole freedom thing a big deal? Will a binary labeled as for Ubuntu work on gNewSense? What are simple IDEs for Debian and gNewSense?

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• many partitions on a single filegroup?¿ does it make sense?

  - by river0

  Hi, I'm designing a datawarehouse solution and I'm a newbie in disk configuration issues, let me explain you. Our storage is spread over 6 storage enlosures having each of them 5 raid-1 disk arrays, and having 2 LUNS defined per each disk array, which makes a total 48 LUNS (this is following Microsoft fast track recommendations for datawarehouse architectures). I would like to partition my data, on other projects I have worked before, we always followed a 1 partition - 1 filegroup rule. On the microsoft fast track recomendations it is advised to create a filegroup and then for that filegroup a data file per each lun... but I pretend to have a week level partitioning... if I apply that rule I think that I'll get too many files and a complex layout. I'm thinking of just creating just one filegroup (with the 48 lun data files), but still create the partitions since I want to keep soem of the benefits of partitions like partition switching... Is this scenario not recommended? What would you suggest?

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• network design to segregate public and staff

  - by barb

  My current setup has: a pfsense firewall with 4 NICs and potential for a 5th 1 48 port 3com switch, 1 24 port HP switch, willing to purchase more subnet 1) edge (Windows Server 2003 for vpn through routing and remote access) and subnet 2) LAN with one WS2003 domain controller/dns/wins etc., one WS2008 file server, one WS2003 running Vipre anti-virus and Time Limit Manager which controls client computer use, and about 50 pcs I am looking for a network design for separating clients and staff. I could do two totally isolated subnets, but I'm wondering if there is anything in between so that staff and clients could share some resources such as printers and anti-virus servers, staff could access client resources, but not vice versa. I guess what I'm asking is can you configure subnets and/or vlans like this: 1)edge for vpn 2)services available to all other internal networks 3)staff which can access services and clients 4)clients which can access services but not staff By access/non-access, I mean stronger separation than domain usernames and passwords.

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• Is MySQL better than PostgreSQL in something?

  - by Massimiliano Torromeo

  I know the question sounds provocative but it really isn't. I'm lately finding MySQL limiting in a lot of areas and liking PostgreSQL more and more. It scales a lot better and it respects the SQL standards a lot more than MySQL. I'm still a newbie in the PostgreSQL world though and since I'm willing to move away from MySQL for all my future projects, what I want to know is: is there any particular feature of MySQL that it is done better (as in more performant or more user friendly etc..) than in PostgreSQL? I'm wondering what I'm gonna miss from MySQL. I already found that the AUTO_INCREMENT fields in MySQL are more handy than SEQUENCES in PostgreSQL and the deployment in windows was problematic in the past (not a problem anymore. never a problem for me). What else? Thanks.

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• SmartOS Virtualization with one public IP address

  - by matejkramny

  Is it possible? (title of this question) Googling Virtualization with one public IP address yields nothing useful What I have: SmartOS on a dedicated server. Dedicated server has one public IP address. What I want to do: Host multiple guest OS from that server Problem: Access to the guest through the (server that virtualizes the guest)'s IP address. Is this possible at all? Sorry, newbie to all this Research http://www.machine-unix.com/beginning-with-smartos/#comment-7256 Does not solve my problem - the guide sets up an internal IP http://blog.bgentil.fr/smartos-use-global-zone-as-gateway-for-guests.html Ideas Perhaps it is possible to do host-based translation like with nginx proxy?

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• How to set _optimizer_search_limit and _optimizer_max_permutations in Oracle10g.

  - by user52856

  I am working on a product that must support both MSSQL and Oracle (10g and 11g). I have some very complex queries that seem to run without issue on MSSQL 2005/2008, but very, very slow with Oracle. The CPU on the oracle server skyrockets for long periods of time, and it seems like the optimizer may be trying to find the best execution plan for the very complex query. I did some Googling to figure out how to limit the amount of time the optimizer spends on this, and came up with _optimizer_search_limit and _optimizer_max_permutations. Both of these parameters are hidden in Oracle 10g, and setting them in init.ora doesn't seem to make any difference. How do I set these parameters in Oracle. Or am I just totally barking up the wrong tree with the assumption that the optimizer is spending several minutes finding an execution plan? Thanks.

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• convert bat to sh

  - by Cris

  I am totally new to scripting in linux...so i want to port some simple window bat files to ubuntu. First file is easy setenv.bat set ANT_HOME=c:\ant\apache-ant-1.7.1 set JAVA_HOME=c:\java in linux i did this and it seems ok setenv.sh #!/bin/bash JAVA_HOME=/usr/lib/jvm/java-6-sun-1.6.0.24/ ANT_HOME=/usr/share/ant echo $JAVA_HOME echo $ANT_HOME but now i want to port this bat file: startserver.bat call ../config/setenv call %ANT_HOME%/bin/ant -f ../config/common.xml start_db call %ANT_HOME%/bin/ant -f ../config/common.xml start_server pause but i have no clue how can i do this in linux call ../config/setenv thank you for any help , direction given.

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• People Pane in Outlook 2010 doesn't show any emails, or does

  - by Eduardo Molteni

  People Pane in Outlook 2010 either does not show any emails, or only shows some emails for other folders. I've tried re-indexing and recreating the profile, to no avail. I really like the new People Pane in Outlook 2010. Not for the "Social" features, but for finding related emails and attachments. But it just does not work. It is totally broken. Do you know some trick to make it work? Using 32-bit Outlook local version, without Exchange.

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• Linux : Forward users mail using exim4 server (newbiw warning)

  - by llazzaro

  Hello, I have a network of linux server, one of them is running exim4 that server could send [email protected]. At exim4 server, I had setup an alias for the users accounts ...for example root : [email protected] But I have other server, if I put the alias email is marked as spam...since they arent using exim4 server. I want to configure the other server to use that exim4 server, in order to dont get the mails mark as spam. Well I know this is really newbie question, but searching at google is difficult since it confuses exim4 server configuration than the client configuration to use exim4 server. Remember, I want root@server1,root@server2,etc mails send via exim4 server!

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• Make PATH variable changes permanent on openSuse

  - by Marlon

  Okay, so I'm trying to do something that should be rather simple but for some reason I can't quite seem to make it work. All I simply want to do is add a path to the PATH environment variable in openSuse. So far, I've edited the following line in /etc/default/su : PATH=/usr/local/bin:/bin:/usr/bin with this line : PATH=/usr/local/bin:/bin:/usr/bin:/usr/local/php/bin:/usr/local/mysql/bin Basically, all I want to do is have access to php and mysqld regardless of how I log in directly from the command prompt without having to type trailing /usr/local/php/bin/ every time. Am I even editing the right file? I'm a bit of a Linux newbie and to achieve something as trivial as this is eluding me. Server gods out there, drop be a crumb, please? :-)

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• Nginx config rewriting subdomain name to 1st URI segment

  - by tim peterson

  I'm unable to do the following nginx.conf rewrite: test.mysite.info to: mysite.info/test here's what i've tried: server { server_name test.mysite.info; rewrite ^ https://mysite.info/test/$request_uri; } I know my DNS (Route53 AWS) is correct b/c: test.mysite.info redirects to mysite.info (just not mysite.info/test) I have an Apache server handling mysite.com which using .htaccess I can rewrite test.mysite.com to mysite.com/test. I haven't changed anything else from the default nginx.conf installation so I'm totally confused as to why such a simple thing isn't working. Here is my full nginx.conf file if that is helpful.

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• setting rpmforge repository for Linux (RHEL)

  - by Ashish

  Hello, I had a Linux centos(5.5) machine, on this i had deployed amavisd (with clamav and spamassassin). Referred these: http://wiki.centos.org/HowTos/Amavisd http://wiki.centos.org/PackageManagement/Yum/Priorities Now I have a linux RHEL machine, details are as follows: (Linux version 2.6.18-164.6.1.el5 ([email protected]) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-46)) x86_64 GNU/Linux Red Hat Enterprise Linux Server release 5.5 (Tikanga)) I want to set up the above mentioned software's on this(RHEL) machine, for that I do (as per the reference link): install yum-priorities but i am unable to install this on my said machine, because the default yum repository provided by RHEL doesn't contain this. How can i deploy the above software's on my RHEL machine, suggest any safe alternate. Please guide since i am a newbie in this matter. thanks in advance Ashish Sharma

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• OpenVPN vs. IPSec - Pros and Cons, what to use?

  - by jens

  interestingly I have not found any good searchresults when searching for "OpenVPN vs IPSec": I need to setup a private LAN over an untrusted network. And as far as I know, both approaces seem to be valid. But I do not know which one is better. I would be very thankfull If you can list the pro's and con's of both approaches and maybe your suggestions and experiences what to use. Update (Regarding the comment/question): In my concrete case the goal is to have any number of Servers (with static IPs) be connected transparently with each other. But a small portion of "dynamic clients like road warriors" (with dynamic IPs) should also be able to connect. The main goal is however having a "transparent secure network" run top of untrusted network. I am quite a newbie so I do not know how to correctly interprete "1:1 Point to Point Connections" = The solution should support Broadcasts and all that stuff so it is a fully functional network... Thank you very much!! Jens

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• Apache hanging with MaxClients is reached

  - by Ash White

  My Apache 2.2 (preform MPM) is hanging when MaxClients is reached, rather than queueing up requests and serving them when child processes become free. When this happens, the web server is totally unresponsive until it is manually restarted. The server stack is Ubuntu 8, MySQL 5, PHP 5. Hardware is Dual Xeons (2.8) with 2GB of RAM. It serves 30,000 - 50,000 pageviews per day. Static images, CSS, and JS are offloaded to a separate server and PHP is cached using eAccelerator. The HTML output of many pages is cached to the filesystem. Relevant Apache directives: KeepAlive On MaxKeepAliveRequests 50 KeepAliveTimeout 2 StartServers 2 MaxClients 150 MinSpareThreads 25 MaxSpareThreads 75 ThreadsPerChild 25 MaxRequestsPerChild 2000

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• User profile and desktop unclickable and unviewable from windows explorer

  - by Abel

  Situation: Windows Vista, latest updates. After restarting to complete an installation, I find myself looking at a totally black windows desktop without any icons. The start menu and taskbar, including quickstart icons, appears. Some, but not all task bar tray icons appear. The systems seems stable. When I open Windows Explorer and click "desktop" in the folder treeview, the cursor immediately jumps back to the previously selected item. No error. Same when clicking on my user's profile or my documents. When I try "save as" in, say, Notepad, nothing happens, the dialog box (which defaults to "my documents") doesn't even show. Again, no error. Nothing serious afaict in the event log. Typing something Start Search shows "Search failed to initialize". Anybody ever encountered such abomination?

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• IIS FTP Server works locally, but cannot connect from remote

  - by Mike Christensen

  I'm trying to setup an FTP server on Windows 2008 Server. I can connect locally: C:\>ftp localhost Connected to WebHead1 220 Microsoft FTP Service However, when I try to connect from remote, it doesn't work: ~>ftp x.x.x.x ftp: Can't connect to `x.x.x.x': Operation timed out ftp: Can't connect to `x.x.x.x' I've tried everything I can think of with the settings. The FTP server is bound to all unassigned IPs and listening on port 21. I've also checked "FTP Server" in the firewall settings. Nothing appears in the FTP log files. I'm totally out of ideas!

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• Root access on media temple.com dv server

  - by Chris M

  This may be a dumb question. I just purchased dv access at media temple.com. I set up root access as required, set up a root access password. Now, for the life of me I can not figure out how this password gets used. Everywhere i try to use the password it does not work. Even tried to ssh with Putty and that didnt work either. Can somebody possibly explain to me what this root access is and how I use it. Im a newbie just trying to learn something new.

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• No sound (USB speakers) in Ubuntu 9.04 Jaunty Jackalope

  - by Mike

  I just installed Ubuntu 9.04 and have been unable to get sound functioning. I have a set of USB speakers (not USB powered with a stereo plug... they are totally USB). I've tried plugging them directly into the tower as well as into the USB port on my Dell 2405FPW monitor. Both USB ports are functioning correctly (I tested by sticking a flash drive in there - they both read it), and the speakers are functioning correctly in Windows. If it's relevant, I have an SB Audigy 2 sound card that came with the computer, but is not being used. Any ideas? Thanks! EDIT: These are the speakers - Logitech S-150 USB Speakers

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• Ubuntu: How to login without entering username and password

  - by torbengb

  I'm a newbie running Ubuntu 9.10. I have two users (wife and me), and each user's screensaver is set to lock so that on wakeup, we get to choose which user's desktop to go to. However, Ubuntu requires a password, so this is pretty tedious. I'd like to switch users without entering any password. I know about this trick that works for the boot login, but it doesn't deal with multiple users. Is it possible to set empty passwords for users in Ubuntu, or skip the password in other ways? (I'm expecting real Linux users to suggest that passwordless users must not get any rights and there be an admin user with a strong password. Yes, you're right. But that's not what this question is about. Thanks.)

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• Looking for application performance tracking software

  - by JavaRocky

  I have multiple java-based applications which produce statistics on how long method calls take. Right now the information is being written into a log file and I analyse performance that way. However with multiple apps and more monitoring requirements this is being becoming a bit overwhelming. I am looking for an application which will collect stats and graph them so I can analyse performance and be aware of performance degradation. I have looked at Solarwinds Application Performance Monitoring, however this polls periodically to gather information. My applications are totally event based and we would like to graph and track this accordingly. I almost started hacking together some scripts to produce Google Charts but surely there are applications which do this already. Suggestions?

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• Wireless Access Point - Can't ping other machines on the wireless network

  - by Surfer513

  I have a wireless access point (Netgear), and I have it setup so that it has an IP address in the current subnet (let's say 192.168.2.0, subnet mask of 255.255.255.0). The machine that it is connected to via ethernet cable has an IP in the same subnet as the AP. The machines that are connected to the AP via the wireless connection also have an IP address in the same subnet as the rest of the network (192.168.2.0). All machines can ping the access point, but they cannot ping each other. I don't totally understand why, because there is connection and all of the machines are in the same subnet. I realize this is a layer 3 device, but is there an issue because of this AP's lack of gateway capabilities? (i.e. no routing table, etc.)

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• Primary domain controller has crashed, secondary does not log in

  - by Hosm

  Hi everybody, I had a primary domain controller on machine A and a secondary one on machine B in my AD domain. Due to some hardware/software problems, I decided to migrate the role of primary domain controller to machine B. Unfortunately, machine A has totally crashed and does not boot. Now I can not even log in to machine B (which itself was a controller in the domain). I need to log into machine B then choose it as the primary controller. I already have synced DNS and AD info. when machine A was alive. Anyone can provide an idea?

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• EBS full device confusion

  - by Mike

  I have a 500GB EBS device (/dev/xvdf) mounted to /vol and all data on the box seems to be writing to /vol correctly (see du output below). For some reason /dev/xvda1 is totally full. Any idea what's going on here? $ df -h Filesystem Size Used Avail Use% Mounted on /dev/xvda1 32G 30G 8.0K 100% / udev 34G 8.0K 34G 1% /dev tmpfs 14G 176K 14G 1% /run none 5.0M 0 5.0M 0% /run/lock none 34G 0 34G 0% /run/shm /dev/xvdb 827G 201M 785G 1% /mnt /dev/xvdf 500G 145G 356G 29% /vol $ du -sh * 8.7M bin 18M boot 8.0K dev 5.1M etc 48K home 0 initrd.img 80M lib 4.0K lib64 16K lost+found 4.0K media 20K mnt 4.0K opt 0 proc 40K root 176K run 7.1M sbin 4.0K selinux 4.0K srv 0 sys 4.0K tmp 414M usr 356M var 0 vmlinuz 145G vol

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