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• How can I get ffmpeg to convert a .mov to a .gif?

  - by user29336

  I'm trying to convert a .mov to a .gif and I'm not having success. Here's the error: ffmpeg -pix_fmt rgb24 -i yesbuddy.mov output.gif ffmpeg version 0.11.1 Copyright (c) 2000-2012 the FFmpeg developers built on Jun 12 2012 17:47:34 with clang 2.1 (tags/Apple/clang-163.7.1) configuration: --prefix=/usr/local/Cellar/ffmpeg/0.11.1 --enable-shared --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-libfreetype --cc=/usr/bin/clang --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libass --enable-libvo-aacenc --disable-ffplay libavutil 51. 54.100 / 51. 54.100 libavcodec 54. 23.100 / 54. 23.100 libavformat 54. 6.100 / 54. 6.100 libavdevice 54. 0.100 / 54. 0.100 libavfilter 2. 77.100 / 2. 77.100 libswscale 2. 1.100 / 2. 1.100 libswresample 0. 15.100 / 0. 15.100 libpostproc 52. 0.100 / 52. 0.100 Option pixel_format not found. If I leave out the -pix_fmt rgb24 part it complains. Thoughts on how to fix?

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• Can a Windows Domain play along with a Hosted Exchange service?

  - by benzado

  I'm setting up a computer network for a small (10-20 people) company. They are currently using a Hosted Exchange service they are totally happy with. Other than that, they are starting from scratch (office doesn't even have furniture yet). They will need some kind of file sharing server set up in their office. If I set up a machine as a file server and nothing more, users will have three passwords to deal with: local machine, file server, and email. If I set up a Domain Controller, identities for local machine and file server will be the same. But what about the Hosted Exchange server? Must the users have a separate email password, or is it possible to combine the two? (I realize it might depend on the specific hosting provider, but is it possible?) If not, it seems like I have these options: Deal with it: users have a separate email password. Host Exchange on the local server: more than they want to manage in-house? Purchase a hosted VPS, make it part of the domain, and host Exchange there. (Or can/should a VPS be a domain controller?) I realize I have a lot of questions in there. The main one: is there any reason to use a Hosted Exchange service if I'm setting up other Windows services?

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• Print from Linux to Windows networked printer

  - by wonkothenoob

  I want to print from a Debian (Lenny) workstation to a Windows networked printer. I'm not even sure what type of Windows network this is. Our tech-support is friendly but doesn't want to get involved with supporting Linux. I need to use it for a variety of reasons and am completely stumped because I know nothing about Windows networking. They gave me URI smb://msprint.ourorg.edu as the "address" of the printer and further confirmed that the domain is "OURORG" and the share is "PHYS-PRI". I've installed CUPS and made sure that it's running as a daemon, I've clicked on the system-config-printer[1] icon, selected the printer as a Windows printer shared via SAMBA and entered the above URI. Attempting to print a testpage just sees it sit in the queue. I attempted to see if I could access the share using two other methods. Method 1. First I tried the "smbclient" from the CLI: $ smbclient -L //msprint.ourorg.edu -U user23 timeout connecting to 192.168.44.3:445 timeout connecting to 192.168.44.3:139 Connection to msprint.ourorg.edu failed (Error NT_STATUS_ACCESS_DENIED) Method 2. I tried to use the GUI tool Smb4K. This shows me four other toplevel (I'm assuming they're domains?) groupings one of which is the one which our IT department supplied to me. Clicking them shows a bunch of other machines with (what I assume are NetBIOS names?) including my own. I see all sorts of other networked printers belonging to other departments but none within mine. Certainly not the PHYS-PRI one suggested to me by the IT folks. I realize that I'm probably using the wrong terminology for the windows network, but can anyone help me with this? What steps should I be taking in debugging this? Do I need to actually run my machine as a SAMBA server to authenticate to the printer or should I just be able to communicate using CUPS? It's a GUI to CUPS configuration http://cyberelk.net/tim/software/system-config-printer/

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• High disk I/O activity in CentOS server

  - by triiim

  I have about 16 websites in a CentOS dedicated, and I am having some problems on high traffic hours, it seems to be a high disk I/O activity causing a general slowdown. I've installed atop and this is what I see on the bottom (the server has been restarted thats why the values are so low): *** system and process activity since boot *** PID RDDSK WRDSK WCANCL DSK CMD 1/18 2176 1.7G 7.3G 854.4M 39 mysqld 671 1248K 3.0G 0K 13 flush-8:0 566 0K 1.1G 0K 5 jbd2/sda2-8 2401 124.2M 529.1M 22408K 3 crond 2032 2.2G 502.0M 0K 12 nginx 2360 425.8M 115.3M 4188K 2 httpd flush-8:0 and jbd2/sda2-8 are the processes I see with iotop using 99% on the IO column, and they are the processes that write the most on the hdd (after mysql). From what I saw in google this could be caused by some ext4 related bug, the current kernel is: Linux srvr.com 2.6.32-71.29.1.el6.x86_64 #1 SMP Mon Jun 27 19:49:27 BST 2011 x86_64 x86_64 x86_64 GNU/Linux I asked the hosting support to update the kernel and they tried but they now say that the server wont boot with the new installed kernel and they had to go back to the previous, they are not helping very much. Does someone has any idea how could I solve the high disk usage caused by flush-8:0 and jbd2/sda2-8 processes?

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• Apache: Isn't chmod 755 enough to set up symlink or alias on Apache httpd on Mac OS 10.5?

  - by eed3si9n

  On my Mac OS 10.5 machine, I would like to set up a subfolder of ~/Documents like ~/Documents/foo/html to be http://localhost/foo. The first thing I thought of doing is using Alias as follows: Alias /foo /Users/someone/Documents/foo/html <Directory "/Users/someone/Documents/foo/html"> Options Indexes FollowSymLinks MultiViews Order allow,deny Allow from all </Directory> This got me 403 Forbidden. In the error_log I got: [error] [client ::1] (13)Permission denied: access to /foo denied The subfolder in question has chmod 755 access. I've tried specifying likes like http://localhost/foo/test.php, but that didn't work either. Next, I tried the symlink route. Went into /Library/WebServer/Documents and made a symlink to ~/Documents/foo/html. The document root has Options Indexes FollowSymLinks MultiViews This still got me 403 Forbidden: Symbolic link not allowed or link target not accessible: /Library/WebServer/Documents/foo What else do I need to set this up? Solution: $ chmod 755 ~/Documents In general, the folder to be shared and all of its ancestor folder needs to be viewable by the www service user.

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• Puppet write hosts using api call

  - by Ben Smith

  I'm trying to write a puppet function that calls my hosting environment (rackspace cloud atm) to list servers, then update my hosts file. My get_hosts function is currently this: require 'rubygems' require 'cloudservers' module Puppet::Parser::Functions newfunction(:get_hosts, :type => :rvalue) do |args| unless args.length == 1 raise Puppet::ParseError, "Must provide the datacenter" end DC = args[0] USERNAME = DC == "us" ? "..." : "..." API_KEY = DC == "us" ? "..." : "..." AUTH_URL = DC == "us" ? CloudServers::AUTH_USA : CloudServers::AUTH_UK DOMAIN = "..." cs = CloudServers::Connection.new(:username => USERNAME, :api_key => API_KEY, :auth_url => AUTH_URL) cs.list_servers_detail.map {|server| server.map {|s| { s[:name] + "." + DC + DOMAIN => { :ip => s[:addresses][:private][0], :aliases => s[:name] }}} } end end And I have a hosts.pp that calls this and 'should' write it to /etc/hosts. class hosts::us { $hosts = get_hosts("us") hostentry { $hosts: } } define hostentry() { host{ $name: ip => $name[ip], host_aliases => $name[aliases] } } As you can imagine, this isn't currently working and I'm getting a 'Symbol as array index at /etc/puppet/manifests/hosts.pp:2' error. I imagine, once I've realised what I'm currently doing wrong there will be more errors to come. Is this a good idea? Can someone help me work out how to do this?

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• centos install / partitioning

  - by ServerSideX

  I'm using NOC-PS to remotely install Centos 6.2 via KVM / IPMI. I'm going to install cPanel as well and they recommend this layout /boot (99MB) swap (2x server RAM) / (remainder) In the o/s install profile within NOC-PS software, it shows as this: part /boot --fstype ext2 --size 250 part pv.01 --size 1 --grow volgroup vg pv.01 logvol / --vgname=vg --size=1 --grow --fstype ext4 --fsoptions=discard,noatime --name=root logvol /tmp --vgname=vg --size=1024 --fstype ext4 --fsoptions=discard,noatime --name=tmp logvol swap --vgname=vg --recommended --name=swap By the time the default partition setup was done installing Centos, I get this [root@server005 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg-root 532G 907M 504G 1% / tmpfs 7.8G 0 7.8G 0% /dev/shm /dev/sda1 243M 28M 202M 13% /boot /dev/mapper/vg-tmp 1008M 34M 924M 4% /tmp [root@server005 ~]# cat /etc/fstab # # /etc/fstab # Created by anaconda on Fri Dec 7 18:47:24 2012 # # Accessible filesystems, by reference, are maintained under '/dev/disk' # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info # /dev/mapper/vg-root / ext4 discard,noatime 1 1 UUID=58b31aaf-5072-4fb1-a858-33bc316fa793 /boot ext2 defaults 1 2 /dev/mapper/vg-tmp /tmp ext4 discard,noatime 1 2 /dev/mapper/vg-swap swap swap defaults 0 0 tmpfs /dev/shm tmpfs defaults 0 0 devpts /dev/pts devpts gid=5,mode=620 0 0 sysfs /sys sysfs defaults 0 0 proc /proc proc defaults 0 0 My question is, how should the NOC-PS install profile look like to get the recommended cPanel partitioning? The server has 16GB RAM, dual 600GB SAS drives and will be used for cPanel shared hosting.

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• Inbox not updating in Exchange 2010, all users affected

  - by TuxMeister

  I'm battling against this darn issue this morning. We have the following setup: Big Hyper-V machine hosting the servers as VM's VM for CAS: WEB.XXX.local VM for Mailbox: EXC.XXX.local Servers are running Server 2008 R2 with Exchange 2010 SP1 Clients are all running Windows 7 Pro x64 with Outlook 2010 x64 The problem we're having is that nobody is able to see any emails received today (16th of October), but they are able to send externally. When I reply back to the email received externally, I don't get an NDR, yet the user cannot see my email. This is what I found and tried thus far: If we create a subfolder in Outlook 2010 and move any email from the inbox into that folder, changes will be immediately reflected in OWA We've been sending test emails to other users internaly and external email addresses and the sent items folder contains all those tests, synced properly to OWA as well Have tried crating a new profile, new emails are still missing Tried disabling Cache Mode, still no luck Also disabled "Download shared folders", still no luck Tried to setup a brand new Exchange mailbox and configured it on a VM that never had Outlook on it, still the same issue Tried restarting Exchange services on both CAS and Mailbox servers, no luck Tried rebooting both CAS and Mailbox servers, still no luck Performed a Mailbox Discovery on my admin account, emails from today are being found in the Discovery results, so the stuff is there, just not updating the user inboxes Any idea about what this hellish thing can be? I've done everything I can think of and also everything I could find out there. Let me know if you need any more details and thanks for reading this!

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• PHP on several servers with session-sharing

  - by Etu

  there's certanly other threads about this, but I have one more question. We are about to scale the website at work to have more than one server. And we need to share the sessions between the servers. We have been looking into different solutions, one in memcached and use Memcached as sessionhandler in PHP. That will probably work. And the idea would be to run memcached on every machine and let all webservers access all other servers memcached servers, and then we have shared sessions between the machines, yay. (we have no resources to setup with sticky-sessions yet, that's a later project. we need this running, and we need this running now. and we will loadbalance with DNS for a starter) But then... If I want to take one server down, say, for maintenance, or a server crashes, or whatever reason. I don't want the users to just loose their sessions and have to start from the beginning... That's why we need some kind of replication, which Memcached does not support. Then I found http://repcached.lab.klab.org/ -- which has multi-master replication of memcached, which is great, and is what I want. But does it work with 2 machines? Say 3, 5, 10? For future scaling. I also looked into redishttp://redis.io/ -- which also seems great, but is a bit more "shaky" with the php-session-handler support, and no multi-master-replication. The thing is that I like to use memcached, but I want to be able to power down one of two boxes without loosing half of the sessions. Any suggestions?

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• Handling emails on a web server - Making sure the FQDN is set correctly based on the website sending the email

  - by webnoob

  I have a Windows 2008 Web Edition server hosting multiple websites using IIS 7.5. At the moment, all the emails are sent via the IIS6 SMTP service. The FQDN of the SMTP service is set to the computer name at the moment which isn't correct as it doesn't resolve to a valid DNS entry and is not RFC compliant. Some questions: Is there any way I can change the FQDN of the SMTP service based on the site sending the email? Would it be Ok to just setup mailserver.mydomain.com and use that as the FQDN for all the sites on multiple domains. Should I be using some other mail server software to handle this better? The reason I am asking is lots of emails are hitting spam folders because the settings are incorrect. I have access to the code that is running the websites so if something needs to be done there then that shouldn't be a problem. The sites are written using ASP.NET 2.0. EDIT: I have just found an option to create an SMTP virtual service. Would this be the way forward? Create a virtual server for each site? Thanks.

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• SFTP, SCP, Secure Webdav: which is the most suitable ?

  - by Xavier Maillard

  Hi, currently, I am hosting a webdav share setup in order to store files I need anywhere I am. It is available via HTTPS. Things are that I do not need all the HTTP machinery -i.e. my nginx http server is only there for this webdav folder. I am not sure I made the best choice. My requirements on the client side are: secured transfers mountable as a network drive at work with 'near realtime sync' usable for any OS I could use (including my mobile (android)) At first, I chose webdav since it would pass through my work proxy (which refuses all that is not on HTTP/S (port 80 or 443)). Today, I am not satisfied with the setup and even if nginx memory footprint is pretty small, its webdav support is not really "clean" and full. What would you recommend between SFTP, SCP and the current webdav solution ? I think SFTP is the closest solution but I still have to find out how to pass through my proxy ;) SCP seems quite limited as I read about it (only file transfers if I read right). Cheers

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• Dealing with upgrade of libevent on Amazon AWS

  - by Dreen

  I am building an application (in Python) on Amazon EC2 that has a following dependency chain: gevent-websocket ---> gevent ---> libevent The last one (libevent) got upgraded on Sunday and my server is now generating this error: (...) File "/usr/lib/python2.6/site-packages/gevent-0.13.7-py2.6-linux-x86_64.egg/gevent/__init__.py", line 41, in <module> from gevent import core ImportError: libevent-1.4.so.2: cannot open shared object file: No such file or directory Not wanting to spend much time on the issue, I tried to mitigate it by creating a symlink to an always-recent version: $ sudo ln -s /usr/lib64/libevent.so /usr/lib64/libevent-1.4.so.2 But it didn't quite work: (...) File "/usr/lib/python2.6/site-packages/gevent-0.13.7-py2.6-linux-x86_64.egg/gevent/__init__.py", line 41, in <module> from gevent import core ImportError: /usr/lib/python2.6/site-packages/gevent-0.13.7-py2.6-linux-x86_64.egg/gevent/core.so: undefined symbol: current_base I am a bit stumped as to how to proceed. Should I create more symlinks? To what? Or is there a better way to solve this problem... PS. For the record I am using Amazon AMI.

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• Looking for issue tracker software for residential property management

  - by Rob

  This question is about a computer software (as per SU guidelines) application for centrally tracking issues concerning the management of a residental block of flats (apartments as they say in the US and France). Issues are incidents - and their resultant unplanned maintenance to address them, also planned one-off maintenance and also regular planned routine maintenance. I live in a block of flats (apartments), and along with other residents, are looking to more closely watch over issues with the communal, shared areas of the premises (corridors, courtyards, stairs, lifts, lights, trash/bin shed, bike stands, parking areas etc) and their maintenance, currently done by a property management company. Our own homes are our own affair internally, its the outside communal areas that I have the interest. The aim being to control costs and possibly reduce them, by proactively managing the property using historical data to predict issues and also to scrutinise maintenance charges against such data to ensure that the costs are as expected. Trending could also be established whereby recurrences of things can be detected and pre-empted to reduce costs. As a software professional, I'm aware of Bugzilla, eventum being free tools for software - which could be customised to fit this application, but wondered if there was something more appropriate. It might be useful for such software to be on a web server, with secure access, so that residents can log in and view the issues.

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• Synchronize Dreamweaver over an SSH tunnel using an SFTP connection

  - by Aeo

  Maybe... Just maybe... I'm asking too much here. Maybe I'm even barking up the wrong tree. I'm looking to essentially have Dreamweaver establish an SSH tunnel to one machine, and then use that connection to synchronize a site that is on another machine entirely. Now for some details: We've got two connections here at work. We've got our office connection for day to day business, and then we've got some fancy connection hosting our web servers upstairs. For the most part they've been mutually exclusive until recently. We had been establishing an SFTP connection to synchronize our web sites by going out over the office connection to the web and coming back in over the fancy connection to our servers upstairs. Recently -ish, we established a LAN connection to one of our servers that makes a pleasant change in VNC connection quality. Thanks to Vinagre, this makes it really easy to connect to any of our servers over this LAN connection via SSH tunnel for VNC. However, in spite of that new addition of a LAN connection, we still synchronize over the 'net. Out the office connection and in on the fancy one upstairs. I'm looking to change this. I'd like to get Dreamweaver to first tunnel over our LAN connection to the servers, and then go from there to whatever connection it needs to. Am I asking too much? The current set up: Dreamweaver is installed on Windows XP which is running within VirtualBox on top of Ubuntu 10.10. The network connection for VirtualBox is currently made in NAT mode, but could easily be switched to a Bridged Connection should it need be. The LAN connection is to 1 of 5 servers running CentOS 5.

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• Drowning in documents - recommend doc management solutions?

  - by Martin Day

  I've been researching document management lately. I want to organise my docs at home and also at the office. Finding affordable solutions one can actually test drive is quite hard. Some that I've downloaded just don't seem to work (testing on brand new Vista PC). I've seen some software on Amazon like Paperport but not really sure what they're like. For home I'd like something to organise files, full text search, good scanner integration, nice interface etc. But for the office it seems harder. I need something that does proper workflow and keeps versions. It will have an audit trail. Documents can be approved, checked in/out etc. I know a few clients who would like something similar. It would be great just to import thousands of documents from a shared drive and get them indexed with dupes killed. I'd like to be super clear about how/where the documents are being stored so that maintenance and backups are clear. My Google/twitter searches lead back to the same tired and vague webpages pushing what look like expensive and custom made solutions. Some might be very good I suppose but it's darn hard to tell. I don't mind a hosted package but all in all I don't think something like Google Docs, as good as it is now, will work. There are too many quirks and missing features (as compared to Office). Being able to work directly with the common Office file formats is important. I've noted a similar sounding question asked here back in August but it didn't seem to turn up too many solutions that I could easily and quickly apply. Also there could have been some changes since then so I feel it's worth asking.

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• Can Dovecot IMAP automatically create Maildir folders for new (virtual) users?

  - by user233441

  everyone. I am learning to set up a dovecot home IMAP server using a virtual Ubuntu 12.04 machine. My intention is eventually to have a home server that uses POP3 to take email from several addresses and remove them from my ISP's servers, while making them accessible through a home IMAP server (this is similar to the setup described at https://help.ubuntu.com/community/POP3Aggregator, which explains how to set up the system with dovecot version 1, and is thus outdated). I intend to use the ISP's server directly when sending messages, and to BCC all sent messages to myself. I've completed the basic set up of the test server: getmail uses POP3 to fetch messages from two test email accounts, and successfully delivers them to the respective Maildir-style new folders on the virtual machine. Dovecot then successfully sees these messages. I have two questions: 1) I had to set up new, cur, and tmp folders for both of the test accounts manually to get this setup to work. Is there a way to get dovecot to create these Maildir folders automatically when I create a new virtual user account (e.g., when I add a user and password combination to my dovecot password file), or is it expected that I write a bash script to automate that task? 2) I would welcome any comments you have on how this approach could be improved as I learn to set it up. My motivations with this approach are 1) to enable archiving/storing emails from several hosting providers that impose a cap on server storage, and 2) to give me somewhat greater control over email storage without requiring that I set up and administrate a mail server from scratch (which I'm not yet prepared to do) (this follows the recommendations at https://ssd.eff.org/tech/email). Thank you!

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• Why am I missing 4GB of RAM on Windows Server 2008 R2 64bit?

  - by Nick G

  I noticed today that a server was very low on memory. It physically has 8GB installed and runs Windows 2008 R2 Standard 64bit. It also hosts 2 virtual machines using HyperV. Server is Dell Poweredge R510. However the host OS reports in task manager that it only has 4GB of RAM, despite actually having 8GB and it being a 64bit OS. Computer properties shows Installed memory: 8.00GB (3.99GB usuable). Why would "usable" be half the real RAM installed under a 64bit OS? Additionally nearly all of the 4GB of visible RAM on the host OS is being used by something without anything showing up in task manager (presumably HyperV as it's allocated 3.6GB to the virtual machines its hosting). However that doesn't explain where the other 4GB has gone which Windows can't even see. Where is my missing 4GB of RAM? Update: Dell OpenManage says this: Total Installed Capacity 8192 MB Total Installed Capacity Available to the OS 4096 MB So looks like Nathan's suggestion of memory mirroring might be correct. I'll have to reboot to check this (I think?) Update 2 OK. So I reboot and I get a message saying "the amount of system memory has changed" (despite not having touched the hardware in a year). Once Windows has booted, all 8GB is visible again. Looks like I probably have a hardware RAM issue (I'll perhaps try reseating it whenever I can chuck everyone off the server next). Thanks for your answers and comments. I was hoping it was going to be the mirrored-RAM option but it seems not - that's not even mentioned in the BIOS.

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• Force delivery retry without restarting the SMTP Service on Windows Server 2008 R2

  - by Mathias R. Jessen

  I have a Windows Server 2008 R2 box hosting 3 virtual SMTP servers; vSMTP01, vSMTP02 and vSMTP03. The first two are configured to deliver all messages to dedicated smarthosts, while the last is set to just deliver the messages on its own. All other delivery settings are as default ----(vSMTP01)-----> {SMARTHST01} / ----Inbound mail--->---SMTPSRV01---[----(vSMTP02)-----> {SMARTHST02} \ ----(vSMTP03)-----> { Internet } Now I want to take SMARTHST01 out for maintenance, but I don't want to reject submissions to vSMTP01 while doing so, so I just let it continue running. When SMARTHST01 is no longer responding, vSMTP01 queues the messages and wait for the first retry interval to pass (15 minutes). So far so good. Let's say SMARTHST01 gets online again after 20 minutes. The first interval has passed, and I'll have to wait another 25 minutes for the second retry interval to pass. If I stop and start the SMTP Service (Services.msc - Simple Mail Transfer Protocol service - Stop), the server will retry all deliveries, but that would cause a service interruption for ALL virtual SMTP servers on the machine, which is highly undesirable. How can I manually force vSMTP01 to retry delivery of all queued messages without interrupting the service of vSMTP02 and vSMTP03?

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• Provider claiming "all web servers in the cloud are automatically kept in sync" - should I be skeptical?

  - by RobMasters

  I'm no expert in cloud computing - I've spent a fair bit of time researching it and various providers but am yet to get any hands-on experience with it. From what I've read about AWS and auto-scaling EC2 instances though, it seems as though each instance should be completely decoupled from all other instances. i.e. If content is uploaded to the web server's local filesystem from a custom CMS backend then that content won't be available if subsequently requested from a different web server in the auto-scaling group. Is that right? I met with a representative of our existing hosting provider recently and he was claiming that it isn't a problem that our legacy CMS system is highly dependent on having a local filesystem. He said that all web servers, regardless of how many, would be kept as exact duplicates so I shouldn't notice any difference compared to our existing setup of a single dedicated server. This smells a little too much like bull fecal-matter to me...should I be skeptical about this? I'm a little worried because my (non-technical) boss who ultimately makes the decisions is all for signing up to this cloud solution because it won't require any extra work. I'm sure that they must at least be able to provide this, otherwise they wouldn't be attempting to sell it to us. But at what cost? It sounds as though each web server will always need to be checking the other web server(s) for new static content, which to me sounds like unwanted overhead that'll slow things down. I'd really appreciate it if somebody could clear this up to me. I'm all for switching to AWS and using S3+CloudFront for all static content, but that isn't looking very likely to happen at the moment.

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• Web based KVM management for Ubuntu

  - by Tim

  We've got a single Ubuntu 9.10 root server on which we want to run multiple KVM virtual machines. To administer these virtual machines I'd like a web based KVM management tool, but I don't know which one to choose from the list of tools mentioned on linux-kvm.org. I've used virsh & virt-manager on my desktop, but would like a web interface for the server. I tested ConVirt on my desktop, but it failed to pickup KVM machines from virsh / virt-manager, and I could not get KVM virtual machine import to work (only Xen). oVirt looks good, but I can't find out if and how I can install it on Ubuntu 9.10.. (And I'd really rather not waste another few days on testing stuff that might not work in the end.) Can anyone recommend any good web based KVM management tools that are easy to install on Ubuntu 9.10? I'm looking for something that will also allow me to run other services like apache and postgresql besides hosting virtual machines, so preferably fairly lightweight & no dedicated OS installs. We don't need any professional clustering / migration or anything, just something that will let us create, start, inspect, administer & stop virtual machines from a web page. Best regards, Tim Update: Anyone have any suggestions? It's awfully quiet here..

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• Uninstallation of WSUS form SBS 2008

  - by Logik

  I am not much experienced system admin, but i came across the client who was having SBS 2008. The server was running out of HDD space. So to recover some, I removed its WSUS role (twas not needed).this removed WSUS 3.0 SP1 & freed a lot of space. This SBS is: Domian controller, DNS, DHCP, File server. After i removed WSUS i disabled windows update service & i rebooted serer & checked from one of client if the shared folders are accessible. they were. Next day all of sudden i got call from them saying they can't login into their domain. I looked into server, the Active directory service was stopped. I never remember touching any service other than windows update. How come AD service stopped running all of sudden. Is removing WSUS have such impact? I am not aware of any such thing.

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• SSH to remote host (edgemarc 4200 or 4500 series routers) and pull arp data

  - by MaQleod

  I've been trying to think of a method to do this for days, but have not come up with anything yet. Ideally, this is what I'm looking to do: From a windows XP machine, I need to open an SSH connection to a remote host, send the arp command, and pull the text results of the command back for use on the client. I will need to parse this data and preferably produce a 2D array of IPs and MAC addresses. There will be no shared keys, this is all done with a username and password that will always be different, they will need to be fed into the command via variables that will be pulled from a database using an autoit script based on the WAN ip of the remote host. Now the actual parsing of the data and creation of the array will be easy if I can just get the text of the arp table. Is there any way to ssh to a remote host, run a command and return the data from that command to the client in a batch script or perl script (it is ok if it writes the text to a file, I can read it out of the file later, I just need it to get to the client)?

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• Reset rc.d so software starts at boot again

  - by natli

  I ran the following 2 commands on my VPS box and now it boots without starting any software at all. According to rcconf it's still supposed to start my chosen software (ssh etc.) but it doesn't. update-rc.d vz defaults update-rc.d vzeventd defaults I already tried removing them again with update-rc.d -f vz remove update-rc.d -f vzeventd remove But that didnt't change anything. /etc/rc.local also still correctly lists some scripts I want to run at start-up, but they don't seem to be called either. I expect the top 2 commands to be responsible, but here's everything I did: mkdir /var/openvz-dl cd /var/openvz-dl wget http://download.openvz.org/kernel/branches/rhel6-2.6.32/042stab062.2/vzkernel-2.6.32-042stab062.2.x86_64.rpm wget http://download.openvz.org/kernel/branches/rhel6-2.6.32/042stab062.2/vzkernel-devel-2.6.32-042stab062.2.x86_64.rpm wget http://download.openvz.org/utils/vzctl/4.0/vzctl-4.0-1.x86_64.rpm wget http://download.openvz.org/utils/vzctl/4.0/vzctl-core-4.0-1.x86_64.rpm wget http://download.openvz.org/utils/ploop/1.5/ploop-1.5-1.x86_64.rpm wget http://download.openvz.org/utils/ploop/1.5/ploop-lib-1.5-1.x86_64.rpm wget http://download.openvz.org/utils/vzquota/3.1/vzquota-3.1-1.x86_64.rpm apt-get install fakeroot alien fakeroot alien --to-deb --scripts --keep-version vz*.rpm ploop*.rpm dpkg -i vz*.deb ploop*.deb --force-overwrite update-rc.d vz defaults update-rc.d vzeventd defaults reboot A huge part of that failed because I was running it on an OpenVZ VPS which has a shared kernel that can't be altered, so I also had to fix the dpkg like so (it was moaning about wanting to install vzkernel with a package not being found); rm /var/lib/dpkg/info/vzkernel* dpkg-reconfigure vzkernel --force dpkg --purge --force-all vzkernel But that didn't fix the boot issue either. How do I make my software start at boot again?

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• How do I change the default ftp folder in MacOS X 10.6?

  - by Wild_Eep

  I'm running WordPress 2.9.1 from a Mac running 10.6.3. WordPress is installed to the /Library/WebServer/Documents folder. WordPress has a feature called AutoUpdate. Clicking an autoupdate button will download and install updated versions of the WordPress software, or third-party plugin tools. It's a convenient way to keep things up to date. WordPress uses FTP to download the files. I've enabled FTP and set up a user account and opened the requisite ports in my firewall for FTP traffic. This doesn't seem to be enough for my self-hosted installation, though. I'm sure this feature was originally designed for someone who has access to a remote shared webserver, and that it's merely a configuration challenge related to the FTP setup. I feel that if I can adjust the initial directory that the FTP service presents to the AutoUpdate feature, everything else will work properly. So, my question is, how do I adjust what folder is presented when a given user connects to a Mac running 10.6.3 via FTP?

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• when to upgrade server to include more cores, versus more processors, versus additional server?

  - by gkdsp

  The server hosting market is separated into single, double, qual, etc., processors, where each processor has several cores, or CPUs. My company will offer a Linux-based web application that relies on an Apache web server and a middle tier for business logic. The middle tier is used to crunch math, and return result to a client. Many clients may access the application simultaneously. The company will start with one processor having 4 cores. I'm trying to understand how the app uses the cores and then how to scale the application as business grows, in terms of servers/processors/cores. For example, I'd assume initially one core would be used for Apache, and the other 3 used to process client's requests for math crunching... Question 1: does that mean, with the 3 cores available, I can handle 3 separate client requests simultaneously (e.g. 1 for each of 3 cores)? I mean, except for the shared RAM, is this effectively like having 3 individual machines (from pt of view or processing client requests simulaneously)? Or, only one client's request may be processed at any one time, but that client's request is divided up into up to 3 cores depending on the type of process running that does the math crunching and whether or not it can take advantage of multi threading (so the # of cores impacts how fast any one client request completes)? I'm confused about what the cores mean to the application here. Question 2: As the business grows and more client requests need to be processed, should the server be upgraded to (A) a new machine with more cores, (B) a new machine with two processors, 4 cores each, or (C) keep the original server and add another server with a single processor? Which route provides the most efficient way to scale the application, in terms of processing more client requests per time interval? Is the choice, for example, limited by RAM (when you need more RAM than box can handle it's time to add another server), or something else? Question 3: Is the total number of client requests processed simultaneously equal to the number of cores times the number of servers (minus the one core for Apache)?

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