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• IP not detected in terremark enteprise cloud server - how to install VMware on instance?

  - by JohnMerlino

  Using terremark enteprise cloud, when you create a server, you assigned an IP address to them and that IP is visible under Detected IP when selecting the server. However, I created a server, with IP address and I created an internet service and connected it with a node. I used protocol TCP and mapped it to port 3001. But I notice when I select my server, the IP address doesnt dsplay under Detected IP and then I VPN Connect, launch terminal and try to SSH with the IP to my server, and I get connection timed out. I presume the reason lies in that the IP address is not being detected. Someone suggested that my VMware-Tools is out of date and in fact on the server instance for VMware-Tools it does say "out of date". I'm not sure how to mount the instance and install VMware-Tools. I am using Mac OSX. Someone said that it will only work on PC running IE.

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• Twitter widget stops page from rendering in IE 8, anybody know why?

  - by ro

  The widget works fine in Firefox but it completely stops the page from being rendered in IE8. This is the error report it gives me: Webpage error details User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; Media Center PC 3.0; .NET CLR 1.0.3705; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.04506.648; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729) Timestamp: Fri, 23 Apr 2010 20:12:25 UTC Message: 'document.getElementsByTagName(...).0' is null or not an object Line: 9 Char: 8365 Code: 0 URI: http://widgets.twimg.com/j/2/widget.js Can anybody help?

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• Color highlights have vanished in emacs

  - by Jim Kiley

  I'm using emacs on a remote Linux server that I access via ssh. I'm editing C files that have a non-standard suffix, so I have had to manually enter c-mode with M-x c-mode every time I open one of those files. I found this to be annoying so I started monkeying with my .emacs to make that problem go away. This made all the color highlights in c-mode go away instead. Correction: All my color highlights are gone. I've removed the .emacs file, logged out and logged back in, but now, the color highlights are gone. I miss them! They were very helpful How do I get them back?

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• rsync windows to linux permission denied

  - by user64908

  Using Command rsync -avzP --delete --omit-dir-times ../../ [email protected]:/var/www/mysite/ I'm getting rsync: mkstemp "/var/www/mysite/.." failed: Permission denied (13) If ext is in the www-data group should I still set all the files to be owned by user www-data? I am trying to publish the files with rsync and then set the permissions using sudo chown -R www-data doc sudo chgrp -R www-data doc but I can't even rsync because of the permission denied. The SSH works fine, the rsync too except when it tries to write over or update some of the files in /var/www Client * Windows 7 * Cygwin 1.7.16 (GNU bash, version 4.1.10(4)-release (i686-pc-cygwin)) * rsync version 3.0.9 protocol version 30 Server * Ubuntu 12.04 * Apache2 * Root Accounts [ubuntu,ext] * Groups [www-data] * sudo vigr has www-data:x:33:ubuntu,ext I have already configure this http://stackoverflow.com/questions/2124169/cwrsync-ignores-nontsec-on-windows-7 This article has also managed to confuse me http://unix.stackexchange.com/questions/41687/how-should-i-rsync-files-in-var-www-if-i-want-them-to-be-owned-by-www-data What is the right procedure?

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• Registering VPS server: some newbie questions [closed]

  - by Angstrem

  I'm new to VPS in particularly and to servers in general. But it turns out that I need to raise and maintain a VPS server. I've decided to register it at https://nodedeploy.com/ but I have lot's of questions, conducted with it. Does that site provide VPS hosting or it is just a web-site hosting? Will the payments for the VPS be done automatically, or I'll have to do them manually? How do I select a VPS OS that will be installed? How do I get the root password? Will it be available after payment? Is ssh access supported there? How can I cancel my account if something goes wrong with my project? What VPS-hosting service would you recommend for using? Maybe, the questions are really full and newbie, but It's really important for me to know that points. I'll be very grateful for any answers.

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• Is it possible to pick out what applications that should run through a VPN in Ubuntu 9.10

  - by user31257

  Hi, I'm using Ubuntu 9.10 and I'm wondering if it is possible to pick out what applications that should use a VPN. Say for example that I want to route Transmissions connection through a VPN, but I also want to be able to access my computer over SSH via my usual static IP-adress ( running the SSH- deamon over my normal internet connection) . Is there anyway to do this? As I've been searching the web I found that at least it is possible to set whether you want both your internet connection and your "local network" to go through the VPN or if you want just the "local network" to go through it. I'm using the network-manager-pptp with the pptp- protocol.

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• Windows port forwarding

  - by carlesso

  This is the scenario: A Windows XP client A Linux Server The client is natted/firewalled/unreacheable from outside, the linux server is public. I need to allow the client, once upon some conditions, to expose the remote desktop port (3389) on the Linux Server, somethig like ssh -R 3389:localhost:3389. I dream it as a service, or something like that so I can start and stop the "forwarding-session" on my needs. I've to pilot this session from some program-language (python or ruby mostly). Any hint? Thanks in advance.

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• xm console command is not working in XEN

  - by stillStudent

  I have XEN 4.0.x.x rpm with CENT OS. I have set it up and have many VMs on it. But problem is when I execute 'xm console ' command from dom0, command just hangs dom0 and some 'y' comes up in next line but nothing really happens. Is it a bug in xen 4.0 and I need to upgrade it or I can tweak some configuration file in /etc/xen/ to make it work. I found following at some site but its not working: In order to be able to login to your domU from the console using: xm create {your hostname}.cfg -c (to the set root password for ssh, for instance, or to see more output than just kernel output when debugging) it may be necessary to add the following line to your /etc/xen/{your hostname}.cfg extra='xencons=tty' Is there any other way to solve it?

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• Can't unlock locked screen, in Ubuntu 12

  - by Camille Goudeseune

  After locking the screen (with a keystroke bound to xlock -nice 8 -mode blank), I can unlock the screen as expected, but only within a few minutes. After being locked overnight, when I hit a key (even Ctrl+Alt combos), the screen stays black with just a brief white flash across the middle of both monitors. The workaround is to ssh in from another host and restart X. Some months ago, this happened every few weeks. By now it happens almost every morning. How do I even start to diagnose this? What might I look for in log files? (The intermittency is particularly troubling.) Failing that, is there an alternative to xlock aka xlockmore? Hardware: 3-year-old HP minitower, GEForce 9800 GT, two Asus LCD monitors. Software: Ubuntu 12.04.2 LTS. Window manager awesome-wm. NVidia driver 304.88. XLock version xlockmore-5.31.

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• Getting started with VNC

  - by Stephen

  I have subscribed to a VPS service for the purpose of running some remote applications. To do this I'm going to need a remote desktop of one sort or another. With this in mind it was suggested that I try Ubuntu. The installation that was prepared for me was Ubuntu 11.10 64 bit (Ubuntu 11.10 (GNU/Linux 2.6.18-348.4.1.el5.028stab107.1 x86_64)) From here I used apt-get install ubuntu-desktop which completed successfully. I rebooted the machine and reconnected via ssh. When I attempt to connect from TightVNC on my Windows machine I get a message about the session being actively refused. What should I do to confirm the service is running? Do I need to setup a firewall rule to allow the ports to pass through? (I am a linux newb so explicitness is appreciated)

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• Virtualbox VM (spawned by Vagrant) running but inaccessible. What now?

  - by Matt V.

  I have a Virtualbox VM running Ubuntu that was started by Vagrant. At some point my ssh session connected to the guest stopped responding. I tried "vagrant halt" from a terminal window on the host (OS X). The shutdown process seemed to also hang. Shutting down the Oracle VM VirtualBox Manager doesn't shut down the VMs themselves. Is there a way in either Vagrant or VirtualBox to force the running VM to shutdown? When running desktop guest OSes, closing the GUI window presents several options for shutting down the guest, but I don't know how to do the equivalent when the guest is running headless.

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• In CQRS (event-sourced), do you need a global sequence counter in the event store?

  - by Jon M

  In trying to get my head around CQRS (and DDD in general) I have come across situations when two events occur on different aggregates but the order of them has domain meaning. If so then they could happen so close together that a timestamp (as used by the sample implementations I have seen) cannot differentiate them, meaning the event store doesn't contain a 'complete' representation of the domain as there is ambiguity over the order in which events occurred. As an example, the domain could fire a CustomerCreatedEvent which applies to the Customer aggregate, and then a CustomerAssignedToAgent event on the Agent aggregate. The CustomerAssignedToAgent event doesn't make sense if it occurs before the CustomerCreatedEvent, but typically both of these might be fired as a result of one operation which makes it likely that the timestamps would effectively be the same. So am I just modelling things badly? Should there ever be a situation where the sequence of events across different aggregates is important? Or should you keep a global sequence number on your event store, so that you can identify the exact sequence in which events occurred?

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• Issues connecting to a pix 501 via console cable

  - by Bourne

  Have a pix 501 that was set up to do filtering and I was working on setting the vpn up when I lost ssh connectivity. Looking at the front, all 4 lan lights blink intensely green but in a very repetitive pattern. The funny thing is there are only 3 devices connected to the 4 ports so that's the first element that doesn't look right to me. Console cable light doesn't turn on when cable is plugged in and have tried rebooting it many many times to see the bootup sequence with no result. Also, I cannot connect to it via pdm or console but the traffic is permitted through. Are there any additional troubleshooting steps I could do or should I count it as dead? Thank you.

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• Server installation logging / logbook / diary?

  - by The MYYN

  Are there some ways field-tested ways to keep a kind of logbook for a server? Including: software installations (and de-installations) custom configurations (e.g. of a webserver, ssh daemon, etc.) personal notes The big picture. I am preparing a server and would like to extensively document the state and how it was established over time, so that a new person can easily see, what's going on and why. The setup is not too complicated, but I would like to do it anyway. I once used something like Maintain /etc with mercurial on Debian and it was nice, but I am looking for a little more flexible solution. Addendum: So I am interested in logging and documentation first. In an ideal world however, I would like to have a command, which in a few steps would take me from a bare newly installed unix system to a functional environment with all the components setup and in place by the means of, say an 'executable' log. But that would be very ideal, I imagine.

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• iphone app store rss failed to open

  - by suvendu

  I write this, $opts = array( 'http' = array( 'user_agent' = 'PHP libxml agent', ) ); $context = stream_context_create($opts); libxml_set_streams_context($context); $doc = new DOMDocument(); $doc-load("http://ax.itunes.apple.com/WebObjects/MZStoreServices.woa/ws/RSS/toppaidapplications/limit=25/xml"); foreach ($doc-getElementsByTagName('item') as $node) { $title = $node-getElementsByTagName('title')-item(0)-nodeValue; $desc = $node-getElementsByTagName('description')-item(0)-nodeValue; $link = $node-getElementsByTagName('link')-item(0)-nodeValue; $date = $node-getElementsByTagName('pubDate')-item(0)-nodeValue; echo $title; echo '<br>'; echo $desc; } ?

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• Do TCP connections work differently within the same subnet?

  - by Dean

  I've encountered some network behaviour that confuses me while trying to get Java RMI working. I use netcat to connect to a local machine: [my_machine]$ nc -w 1 192.168.0.100 60000 && echo success success I try to do the same to my server: [my_machine]$ nc -w 1 my-servers-ip 60000 && echo success This doesn't work, unless I explicitly listen on the server socket: [amazon_ec2]$ nc -l 60000 [my_machine]$ nc -w 1 my-servers-ip 60000 && echo success success For the version that fails, the SYN packet receives a RST, ACK in response. I'm not too knowledgable about this stuff, at this point I only have wild theories such as the one in the question. Any ideas? Potentially useful details: Local Machine (192.168.0.100) - Macbook Remote Machine (Amazon EC2) - Amazon Linux AMI 2012.03 Security Group Settings: 22 (SSH) 0.0.0.0/0 1099 0.0.0.0/0 49152-65535 0.0.0.0/0 "iptables -L" shows no rules set

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• Running php and java in parallel on the same server

  - by manni

  I have got a java server from Rackspace. and I am already running a java application on the server. Now I want to run a php application on the same server. What should I do? When I asked Rackspace people, they said, apache is already installed on the server so I can run the php on it. I have also tried installing php on the server and then copied my php files in var/www/xxx but when I hit the url it is saying giving the page not found error. They have given me the ssh server root username and password. Thanks in advance.

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• Setting up linux server with multiple access rights

  - by Mark

  I am a graduate student and want to set up a linux server (preferably Ubuntu) in my office. I also want to give my friends SSH access to that box. My question is can I set up my server such that I can give one of my friends rights to install software on my machine but he cannot brows around outside the directory he is allowed to? Can I set up multiple apache instances (on different ports) for different people? so each has access to their own apache instance?

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• How to move mail accounts when migrating webhosting

  - by pkswatch

  I am migrating my website abc.com from one webhosting company to another in a shared hosting environment. Both have cpanel. And the second hosting account i am preparing to move is my multi-domain hosting account with 3 domains already in it. The problem is, i have many email accounts associated with my website abc.com, which are accessed using webmail. So if i move it to the other host, will i lose all those accounts and their emails? If yes, then how should i synchronise the email accounts so that all the accounts and the contained emails remain intact? I saw some several sync tools like IMAP Sync, etc. But these require two hosts while synchronizing, and as you see, i have just one domain name to be synchronized over 2 servers. PS, i do not have any ssh access on either of them, and i have made complete backup of all files using backup wizard in cpanel.

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• Best practice for administering a (hadoop) cluster

  - by Alex

  Dear all, I've recently been playing with Hadoop. I have a six node cluster up and running - with HDFS, and having run a number of MapRed jobs. So far, so good. However I'm now looking to do this more systematically and with a larger number of nodes. Our base system is Ubuntu and the current setup has been administered using apt (to install the correct java runtime) and ssh/scp (to propagate out the various conf files). This is clearly not scalable over time. Does anyone have any experience of good systems for administering (possibly slightly heterogenous: different disk sizes, different numbers of cpus on each node) hadoop clusters automagically? I would consider diskless boot - but imagine that with a large cluster, getting the cluster up and running might be bottle-necked on the machine serving the OS. Or some form of distributed debian apt to keep the machines native environment synchronised? And how do people successfully manage the conf files over a number of (potentially heterogenous) machines? Thanks very much in advance, Alex

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• Linux freezes every few seconds

  - by Zeppomedio

  We're having an issue where one our Linux boxes (Ubuntu 10.04 LTS, running on EC2 with a quadruple-large size, 68GB of RAM and 8 virtual cores with 3.25GHz each) freezes up every few seconds. Typing in an ssh session will freeze, and running strace on one of the Postgresql processes that's running usually shows: 02:37:41.567990 semop(7831581, {{3, -1, 0}}, 1 for a few seconds before it proceeds (it always gets stuck at that semop). OProfile shows that most of the time is spent in the kernel (60%) versus 37% in Postgresql. The result of these halts (which began suddenly a day ago) is that load on the box has gone from 0.7 to 10+, and causes our entire stack to slow done. Any ideas on how to track down what's going on? iostat doesn't show the disks being particularly slow or overloaded, and top shows user cpu % spike from 8% to about 40% whenever these back-ups happen.

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• How to make a secure MongoDB server?

  - by Earlz

  Hello, I'm wanting my website to use MongoDB as it's datastore. I've used MongoDB in my development environment with no worries, but I'm worried about security with a public server. My server is a VPS running Arch Linux. The web application will also be running on it, so it only needs to accept connections from localhost. And no other users(by ssh or otherwise) will have direct access to my server. What should I do to secure my instance of MongoDB?

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• Amazon EC2 Socket connection not being accepted

  - by Joseph

  I am trying to run a java application on my EC2 instance. The application accepts socket connections on port 54321. If I try and connect to it, it times out. My Security Group is set as: TCP Port (Service) Source Action 21 0.0.0.0/0 Delete 22 (SSH) 0.0.0.0/0 Delete 80 (HTTP) 0.0.0.0/0 Delete 20393 0.0.0.0/0 Delete 54321 0.0.0.0/0 Delete Is there anything else I need to do? # iptables -nvL Chain INPUT (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination Chain FORWARD (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination # iptables -nvL -t nat Chain PREROUTING (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination Chain INPUT (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination Chain POSTROUTING (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination #

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• ubuntu server refusing connections via port forwarding

  - by Matt

  Getting some really weird behavior from our Ubuntu server... it's behind a Verizon router firewall with port forwarding (port 8080 to port 80 on the server), and we've been having issues accessing it via this external IP. From within the network, it appears to respond normally (I can access it via web browser and SSH), but refuses connections through port forwarding (using our static external IP). The strangest thing is that it actually responds to external port-forwarded connections right after being restarted, but quickly lapses back into this pattern of refusing external connections. I'm a bit of a server newbie (I'm actually a programmer in a small startup that just lost their server ops guy, urgh) so this is all trial by fire for me. Does anyone have any advice on what could be going wrong here? Any help would be appreciated, thanks.

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• Cisco: changing VTP mode server/client to transparent

  - by J. Smith

  I have around 40 L2 switches (2960, 3560, 3500, 3750) running in VTP client mode and one L3 switch (6500) running in VTP server mode, all connected together. I would like to switch everything in VTP transparent mode without any interruption of service. I've already test on a poc version with 3 switches (Catalyst 2950, 3560 and 3750). Using serial and SSH connection, it is seems working but i'm not sure it is enough representative compare to the real network. Knowing that the VTP Pruning is enabled, I am wondering what would be the best procedure to proceed the changement. I've read that we could lost connection by keeping it enabled. Should I change the server or clients first? Is it important to change the VTP domain and VTP Pruning parameters?

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