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• How do I migrate Exchange 2007 to new hardware?

  - by Graeme Donaldson

  As per my previous question, I have an Exchange 2007 box which is also a DC. Since I can't demote it while Exchange is installed, I want to move Exchange to a different server. Does anyone have any articles, tips or experiences to share on this? The last time I did this it was with Exchange 2003 and even that is a little rusty in my head. The setup is a single Exchange 2007 Hub/Edge/Mailbox/CAS server. Its currently on Windows Server 2008, I can migrate it to the same OS, or I can go to 2008 R2, I'm not really picky on that. We're running OWA/ActiveSync/POP3(S)/IMAP(S) for client access. I already have another fully functional DC/GC/DNS box in the same site and clients in the site are already using that for DNS. It's also the preferred site bridgehead for AD replication. Update: After reading Evan's answer I realised that my original question wasn't worded correctly. I'm not looking to do a swing migration, I actually need to move Exchange completely over to a new box. I have done swing migrations in the past, i.e. moving over to a temporary box and back to the original hardware afterwards, and I'm not really sure why I used that term in the original question since it's not what I intended. Any tips?

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• Postfix (delivery temporarily suspended: conversation with mydomain.net [private/lmtp] timed out while receiving the initial server greeting)

  - by Paul

  I'm running Debian 7.1, Postfix version 2.9.6, Dovecot Version 2.1.7 To set it up I followed mostly this (without the spamass-clamav-greylist bit) I have also got setup smart host relaying via gmail postconf -n reveals: alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases append_dot_mydomain = no biff = no config_directory = /etc/postfix inet_interfaces = all inet_protocols = ipv4 mailbox_size_limit = 0 milter_default_action = accept mydestination = MyDomain, localhost.net, localhost myhostname = MyDomain.net mynetworks = 127.0.0.0/8 myorigin = /etc/mailname readme_directory = no recipient_delimiter = + relay_domains = mysql:/etc/postfix/mysql_relay_domains.cf relayhost = [smtp.gmail.com]:587 smtp_connect_timeout = 120s smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/relay_passwd smtp_sasl_security_options = noanonymous smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtp_use_tls = yes smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU) smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_non_fqdn_hostname, reject_non_fqdn_sender, reject_non_fqdn_recipient, reject_unauth_destination, reject_unauth_pipelining, reject_invalid_hostname smtpd_sasl_auth_enable = yes smtpd_sasl_path = private/auth smtpd_sasl_security_options = noanonymous smtpd_sasl_type = dovecot smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtpd_use_tls = yes virtual_alias_maps = mysql:/etc/postfix/mysql_virtual_alias_maps.cf virtual_gid_maps = static:3000 virtual_mailbox_base = /home/vmail virtual_mailbox_domains = mysql:/etc/postfix/mysql_virtual_mailbox_domains.cf virtual_mailbox_maps = mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf virtual_transport = lmtp:unix:private/lmtp virtual_uid_maps = static:3000 I am able to send emails to the outside world but all emails sent to me are getting stuck. mailq is showing numerous lines: A69C2414C4 2621 Fri Dec 27 14:57:03 [email protected] (conversation with MyDomain.net[private/lmtp] timed out while receiving the initial server greeting) [email protected] AB78B414BE 3796 Fri Dec 27 14:56:50 [email protected] (delivery temporarily suspended: conversation with MyDomain.net[private/lmtp] timed out while receiving the initial server greeting) [email protected] /var/log/mail.log is showing: Dec 28 09:50:09 hostname postfix/lmtp[10828]: E947C414CD: to=, relay=localhost[private/lmtp], delay=64012, delays=63712/0.25/300/0, dsn=4.4.2, status=deferred (conversation with localhost[private/lmtp] timed out while receiving the initial server greeting) Any help would be greatly appreciated. Thank you

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• Looking for comprehensive computer monitoring software

  - by cornjuliox

  Summer in this country is insanely hot. So hot in fact, that I think we just lost a machine due to overheating (last recorded CPU/GPU temp was close to 100 C, now it wont start and lets out a long series of short beeps on power up), but that's not my concern here. Since heat is such a problem for me, I use several different pieces of software to monitor temperatures in my machine. I use MSI Afterburner to monitor GPU temp, control GPU fan speed and for some light overclocking, and then I use Speccy and SpeedFan to monitor the rest of the system, CPU temp and everything. The setup works fine for now, but I want to consolidate all this into one program so I'm not juggling several windows at once. Is there any program out there that will let me monitor the following from a single window: CPU Temp and Fan Speed CPU clock GPU Temp and Fan Speed GPU clock, both core and memory Additionally, mobo temp (Speccy lists both CPU and Motherboard temp, I assume that the latter is referring to North and Southbridge temperatures. I'm also looking for the ability to chart these data points on a graph over time, basically to see just how high the temperatures spike under load and for general analysis. It'd be nice if it could handle overclocking of both CPU and GPU in real time too. Any suggestions? Edit: I forgot to mention that I'm on Windows 7, 64-bit

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• JBossMQ - Clustered Queues/NameNotFoundException: QueueConnectionFactory error

  - by mfarver

  I am trying to get an application working on a JBoss Cluster. It uses Queues internally, and the developer claims that it should work correctly in a clustered environment. I have jbossmq setup as a ha-singleton on the cluster. The application works correctly on whichever node currently is running the queue, but fails on the other nodes with a: "javax.naming.NameNotFoundException: QueueConnectionFactory not bound" error. I can look at JNDIview from the jmx-console and see that indeed the QueueConnectionFactory class only appears on the primary node in the Global context. Is there a way to see the Cluster's JNDI listing instead of each server? The steps I took from a default Jboss 4.2.3.GA installation were to use the "all" configuration. Then removed /server/all/deploy/hsqldb-ds.xml and /deploy-hasingleton/jms/hsqldb-jdbc2-service.xml, copying the example/jms/mysq-jdbc2-service.xml file into its place (editing that file to use DefaultDS instead of MySqlDS). Finally I created a mysql-ds.xml file in the deploy directory pointing "DefaultDS" at an empty database. I created a -services.xml file in the deploy directory with the queue definition. like the one below: <server> <mbean code="org.jboss.mq.server.jmx.Queue" name="jboss.mq.destination:service=Queue,name=myfirstqueue"> <depends optional-attribute-name="DestinationManager"> jboss.mq:service=DestinationManager </depends> </mbean> </server> All of the other cluster features of working, the servers list each other in the view, and sessions are replicating back and forth. The JBoss documentation is somewhat light in this area, is there another setting I might have missed? Or is this likely to be a code issue (is there different code to do a JNDI lookup in a clusted environment?) Thanks

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• Triple-monitor set-up (2 unique, 1 cloned): Can a VGA splitter be used on one output of a dual-head

  - by stakx

  Background: I'm currently researching hardware components for some kind of information terminal we're building. This application of ours makes use of three output screens: (1) A touch screen where all user input is made; (2) A regular LCD monitor where the requested information is being displayed; and (3) A projector which displays exactly the same signal as screen (2) does. (All screens will run at the same resolution of 1024x768 btw.) Now I figured that using a dual-head video card would be sufficient, let's say a Matrox P690 low-profile PCI card. This would involve having a Y cable connected to the graphics card itself, then two DVI-to-VGA adapters at each end of the Y cable, and then having a VGA splitter on one of the VGA outputs. The following shows the setup in question: 0--1---------2-> VGA (DSUB-15) \ \ ----2-3---------> VGA (DSUB-15) \ \ -----------------> VGA (DSUB-15) 0: graphics card (LFH60 jack) 1: LFH60 to DVI-I dual monitor Y cable 2: DVI-to-VGA adapters 3: VGA splitter cable Question(s): Will this work? I'm particularly concerned about the following points: Can a low-profile PCI video card output a signal which is strong enough for three monitors (even if it's a dual-head card)? Does the combination of so many adapters and splitter cables work? (The LFH-to-DVI cable comes with the video card) Will the VGA splitter cable degrade the signal on the output screen & projector significantly? (If so, would a USB-powered splitter cable remedy this problem?) I can't possibly expect anyone to answer all those questions, but any input is appreciated.

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• Mac computers unable to connect to samba

  - by tan-ce

  I have a Ubuntu 9 server with samba 3.3 installed. This server has two network interfaces, one to a "public network" which I do not have any control over and another to a private LAN. On the private LAN, samba is the Domain Controller and nmbd is the WINS server on that network. On the "public network", I have configured a second instance of nmbd to run as a WINS client. The setup seems to work fine for Windows XP (on the domain or otherwise) as well as other Ubuntu machines. Finally, my question: Mac computers seem unable to connect to the samba server. As far as I can tell, it is as if samba is invisible to the MAC computer. Could my configuration of nmbd be causing this problem? Or is this simple a Mac oddity and is there anything I can do about it? New updates/info: We tried to connect through the Finder - Connect to Server, we entered smb://servername where servername is the netbios and DNS name. (There is also a DNS entry for the same name on the network) We also tried connecting by IP address Also, I just realized that there is at least one Mac which can connect. (Leopard 10.5.8) I will try to get the Mac OS versions of the computers which couldn't connect as soon as I can. The Mac which could not connect was running Mac OS X 10.4.11. Was there a change to samba on Mac OS between 10.4 and 10.5?

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• Multiple static WAN IP addresses to single LAN subnet

  - by Jessy Houle

  Below is my home network topology. I currently have 5 static IP addresses, 3 of which are in use by 3 routers. These routers in-turn subnet internal networks and port forward. I use my SSL VPN appliance to remote home from work or on the road. At this point I can remotely administer my Windows Server. I know the network is setup wrong, I was matching existing hardware the best I knew how. http://storage.jessyhoule.com.s3.amazonaws.com/network_topology.jpg Ok this said, here is the problem... One of my websites on my Windows Server now needs to be secure (SSL using port 443). However, I'm already port forwarding port 443 to my VPN appliance. Furthermore, if I'm going to have to reconfigure the network, I would really like to be able to use the SSL VPN to remotely administer all machines. I mentioned this to a friend of mine, who said that what I was looking for was a firewall. Explaining that a firewall would take in multiple static (WAN) IP addresses, and still allow all internal devices to be on the same network. So, basically, I could supply my SSL VPN appliance it's very own static (WAN) IP address routing, and yet have it on the same internal network (192.168.1.x) as all my other devices. The first question is... Does this sound right? Secondly, would you suggest anything different? And, finally, what is the cheapest way to do this? I am started down the road of downloading/installing untangle and smoothwall to see if they will do the job, hoping they take multiple static (WAN) IP addresses. Thank you in advance for your answers. -Jessy Houle

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• Inconsistent SMTP Access

  - by Mike Hanson

  I have a mail server setup on Windows Server 2008. All was working fine, until I wanted to map a drive on the server so that I can access files on another machine. Windows prompted me to configure Network Discovery, which I did with the "Home/Office" option rather than "Public". After that, several access points that worked before stopped working, like VNC, SMTP, etc. After reinstalling those packages, things appeared to be working again. Unfortunately, problems have returned with my SMTP server. I can use an web-based SMTP tester, and it connects in 62msec (as expected). However, if I telnet from my machine on the same LAN, it takes more than 20 seconds to connect! When I try to send messages from Outlook, it times out entirely with the message: Sending' reported error (0x80042109) : 'Outlook cannot connect to your outgoing (SMTP) e-mail server. If you continue to receive this message, contact your server administrator or Internet service provider (ISP).' I've checked the firewall settings, I've tried configuring it to use port 587 instead of 25, but nothing gets around this problem. Does any have any useful insights? Thanks in advance!

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• Network Load Balancing, intermittent port problem on Windows Server 2008

  - by Jimmy Chandra

  Trying to troubleshoot an intermittent problem on a Windows Server 2008 NLB. I think it might be related to an NLB issue. We are using Windows Network Load Balancing to balance load for our multiserver SharePoint front ends. Say... Web Front End 1 IP is 192.168.1.100 and Web Front End 2 IP is 192.168.1.101, the NLB is setup to load balance both WFE servers on any incoming traffic to the IP 192.168.1.200. Sometimes we got an intermittent issue where when we try to access the SharePoint site using 192.168.1.200:8080 (say the site is set up to run on port 8080) from a remote client, it will display page not found. Pinging the 192.168.1.200 will give responses, but when trying to telnet to 192.168.1.200:8080 it just won't connect. However, browsing the SharePoint site directly on individual WFE (192.168.1.100 and 192.168.1.101) show no problem whatsoever. My guess also (we didn't get a chance to try it yet, but I think it should work), if I try connecting remotely to individual server, it will respond just fine. But any attempt on trying to connect using the virtual IP (192.168.1.200) will fail miserably. Funny thing is, after a while it will return back to normal. Anyone had similar experience with this type of problem while implementing NLB before? We are doing this in a virtual environment.

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• Error setting up Data Protection Manager 2010 Agents / Network "Unauthenticated" in network settings

  - by Bowsa

  I'm not sure if the two are connected but i suspect they are. Basically I'm tring to setup Data Protection Manager 2010 on a fresh install of Server 2008 R2 in a SBS 2003 domain. Everything went fine until trying to install agents across the network. Upon clicking add, i get the following error message: Unable to connect to the Active Directory Domain Services Database. Make sure that the DPM server is a member of a domain and that the controller is running. Also verify that there is network connectivity between the DPM server and the domain controller. ID: 7 As usual (worryingly) the MSDN support for 2010 products is nearly non existant, clicking the error ID simply gives a page not found error. So after 2 days of Googling and trying various fixes (DNS settings, adding permissions to AD objects, rejoining the domain and many more) I thought I'd ask here in the hope that someone out there may have had this issue before. Any help greatly appreciated! Some further info: Firewalls are disabled on the Server 2008, SBS, and client machines. Manually installing and adding the client in also fails, as the DPM server tries to contact the DC first. Edit: I tried creating a new protection group instead, and it gives a different error upon adding the machines: Following machines are not found in AD: COMPUTERNAME.COMPANYNAME.LOCAL Is there a certain directory structure it follows in AD?

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• Samba4/Ubuntu Shares Incorrectly Available to All Users

  - by Dan

  I've got my Ubuntu server working with Samba4 and got it set up as the Primary domain controller on my network with AD and all that goodness. However, I'm trying to get my Samba configuration to work with the users and groups I've defined with the Active Directory tools from Windows. For instance, I've got a share X which I want users A and B (as part of the 'management' group, known as LLGrpManager in my setup) to see, but no body else. However, after making changes to the configuration, restarting Samba, I test by connecting to the share with my Mac over Samba as user 'C' which isn't part of the management group, and I can, incorrectly, see the X share. I've tried alsorts of combinations of specifying the group with no luck at all. I've got a feeling that my global config might be too lenient or something to do with file permissions but being a bit green, I'm without clue. My /etc/samba/smb.conf # Global parameters [global] server role = domain controller server string = Office Server workgroup = LLDOMAIN realm = lldomain.local netbios name = DUMBO passdb backend = samba4 logon path = \\%L\profiles\%U logon drive = L: log file = /var/log/samba/%m.log max log size = 50 security = ads domain logons = yes domain master = auto usershare allow guests = no valid users = %S [netlogon] path = /var/lib/samba/sysvol/lldomain.local/scripts read only = no guest ok = no [sysvol] path = /var/lib/samba/sysvol read only = No guest ok = no valid users = @LLDOMAIN\LLGrpManager [ShareX] path = /data comment = Entire Data Volume guest ok = no comment = Entire Data Volume guest ok = no valid users = @LLDOMAIN\LLGrpManager admin users = @LLDOMAIN\LLGrpManager browsable = no inherit acls = yes inherit permissions = yes ... My /etc/nsswitch.conf I've also instructed the system to use the nss winbind library when searching for users or groups by adding the stanza passwd and group in /etc/nsswitch.conf: passwd: compat winbind group: compat winbind shadow: compat Permissions on the folder in question drwxrwxrwt 8 root root 4.0K Oct 28 19:11 data

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• Home Server: cpu virtualisation, what to choose?

  - by Huygens

  I'm looking for virtualisation solutions for storage and OS for a home server. A sort of private cloud where I manage the storage space independently of the VM one. This question focus on VM (or compute instance) management and what would best suit my needs. (I have another question related to the storage management). My use cases are: A backup server: rsync and other services running. A personal cloud server: a kind of owned dropbox system, à la ownCloud. " users foreseen. A media server: streaming videos and displaying photos. Here my environement and wishes: Server: HP Proliant MicroServer with 8 GB RAM (AMD Turion dual core with AMD-V technology) OS types: only Linux (perhaps a *BSD VM in the future) Linux distributions do not matter, I'm familiar with RHEL, Fedora, Suse, Ubuntu, but any other recommandation will be fine 2-3 VMs foreseen: backup server, owncloud server and media server (optional). Those are only servers, so no graphical console needed (I don't need VirtualBox) By VM I mean a virtualised environment like KVM, Xen, etc. or a compute instance like with OpenStack storage should be "virtualised/cloudified" see my other question. VM should be able to be migrated to another server in the future if performance cannot be fullfilled anymore by the current server It does not matter if installation of such setup is complicated as long as management tools allow for easy maintenance I don't have Windows at home, so solution should be Linux friendly and would be nice to be web based. But native apps are OK too. System should be easy to enhance: by adding a new server to migate some of the VMs to it. So it's really a kind of private cloud on which I could run some Linux OS. I would prefer free (libre, as in a free speach) and open source tools. But it does not have to be free as in a free beer. So Xen, KVM, VitualBox or OpenStack? What would you recommend?

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• convert a logical partition to a primary partition

  - by ant2009

  Hello, Fedora 14 xfce I have the following partition setup. I would like to know how can I convert the logical partition sda6 to a primary partition. Disk /dev/sda: 320.1 GB, 320072933376 bytes 255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x1707a8a5 Device Boot Start End Blocks Id System /dev/sda1 2048 1026047 512000 83 Linux /dev/sda2 1026048 205844479 102409216 83 Linux /dev/sda3 205844480 214228991 4192256 82 Linux swap / Solaris /dev/sda4 214228992 625141759 205456384 5 Extended /dev/sda5 214231040 573562879 179665920 83 Linux /dev/sda6 573564928 625141759 25788416 7 HPFS/NTFS Filesystem Size Used Avail Use% Mounted on /dev/sda2 97G 5.0G 91G 6% / tmpfs 494M 176K 494M 1% /dev/shm /dev/sda1 485M 68M 392M 15% /boot /dev/sda5 169G 26G 135G 16% /home # partition table of /dev/sda unit: sectors /dev/sda1 : start= 2048, size= 1024000, Id=83 /dev/sda2 : start= 1026048, size=204818432, Id=83 /dev/sda3 : start=205844480, size= 8384512, Id=82 /dev/sda4 : start=214228992, size=410912768, Id= 5 /dev/sda5 : start=214231040, size=359331840, Id=83 /dev/sda6 : start=573564928, size= 51576832, Id= 7 I would like to convert sda6 to a primary partition, the reason for this it to install windows 7 starter. Many thanks for any suggestions,

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• Move an SSD with Windows 7 to a new PCIe SATA controller card

  - by Shevek

  This is my current setup: Abit AB9 QuadGT motherboard which has an Intel P965 chipset with Intel ICH8 SATA Rev. 2.0 controller Kingston HyperX 3K 120GB SSD which supports SATA Rev. 3.0 Windows 7 Ultimate x64 For some reason I was unable to install Windows with the controller set in AHCI mode, even with the correct driver from Intel so it is currently in IDE mode. Due to the ICH8 controller being SATA Rev 2.0 and running in IDE mode, the SSD is operating well under it's published read/write speeds. I have ordered an Asus U3S6 controller card to add both SATA Rev. 3.0 and USB 3.0 to my computer. The motherboard does have a PCIe x4 slot available so I will hopefully achieve the full potential of my SSD. My question is this - am I able to swap the SSD over to the controller card from the motherboard controller without having to clean install Windows? I am hoping that all I will need to do is ensure that the controller card drivers are available to Windows and set the registry as per this KB article. Will this work or should I perform a clean installation?

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• Joining Samba to Active Directory with local user authentication

  - by Ansel Pol

  I apologise that this is somewhat incoherent, but hopefully someone will be able to make enough sense of this to understand what I'm trying to achieve and provide pointers. I have a machine with two network interfaces connected to two different networks (one of which it's providing several other services for, such as DNS), running two separate instances of Samba, one bound to each interface. One of the instances is just a workgroup-style setup using share-level authentication, which is all working fine. The problem is that I'm looking to join the other instance to an MS Active Directory domain (provided by MS Windows Small Business Server 2003) to enable a subset of the domain users to access the shares from Windows machines on the other network. The users who need access from the domain environment have accounts (whose names are all-lowercase versions of their domain usernames) on the machine running Samba, but I'm not sure about how to map the UIDs and everything I've read concerns authenticating accounts on that machine against either AD or another LDAP server. To clarify: I only want the credentials for AD users accessing the non-workgroup Samba instance to be authenticated against AD, not the accounts on the machine running Samba. I hope this is sufficiently clear. EDIT: In addition to being able to access the Samba shares from AD, I do also need to be able to access a share on the domain from the machine running Samba but would still like everything non-Samba-related to authenticate locally.

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• NetInstall working on some systems, not working on others

  - by cduruk

  Hi, I'm having an issue where my NetInstall setup works on some computers and fails on others. I am not able to diagnose the issue. I created an image of a Mac Mini and then created a NetRestore image using the System Image Utility found on Snow Leopard Server. NetBoot and NFS all seem to be working fine on the server, which is an XServe. Then I select the NetInstall image from the Startup Disk on a machine. On some of the machines, the process works as expected. On some of them, I see the globe icon blink a few times and then the system boots to the regular hard drive. I have captured the tracedump and the system.log logs from the server on both cases where NetInstall seems to work and fail. Here is the link that has all the logs http://gist.github.com/232232 The gist of the failure seems to be from the lack of BSDP DISCOVER in the failure but I'm not able to identify why that exactly is happening. I'd really appreciate any help on this issue.

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• install latest gcc as a non-privileged user

  - by voth

  I want to compile a program on a cluster (as a non-privileged user), which requires gcc-4.6, but the cluster has only gcc-4.1.2. I don't want to tell the administrator to update gcc, because 1) he is busy and would do it only after several days. 2) He probably wouldn't update it anyway, since other users may need the older gcc version (gcc is not backward compatible) I tried to compile gcc from source, which seems more difficult that it sounds, since it requires several other packages to be installed (GMP, MPFR, MPC, ...), and when I did it, after several hours I got a message like checking for __gmpz_init in -lgmp... no configure: error: libgmp not found or uses a different ABI (including static vs shared). at which point a got stuck. My question is: what is the easiest way to install the latest version of gcc as a non-privileged user? (something like apt-get install XXXXX, with an option to not install as root for example) The setup of the cluster is the following: CentOS release 5.4 (Final) Rocks release 5.3 (Rolled Tacos) If there are no other options than compiling from source, do you have any ideas how to handle the above error?

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• Compiling linux kernel, how much size is needed?

  - by ant2009

  Hello, I am have downloaded the newest most stable linux kernel 2.6.33.2 I thought I would test this using virtualbox. So I create a dynamically sized harddisk of 4gb. And installed CentOS 5.3 with just the minimum packages. I setup the make menuconfig with just the default settings. After that I ran make and got the following error: net/bluetooth/hci_sysfs.o: final close failed: No space left on device make[2]: *** [net/bluetooth/hci_sysfs.o] Error 1 make[1]: *** [net/bluetooth] Error 2 make: *** [net] Error 2 The amount of space I have left is: # df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup00-LogVol00 3.3G 3.3G 0 100% / /dev/hda1 99M 12M 82M 13% /boot tmpfs 125M 0 125M 0% /dev/shm My virtual size is 4gb, but the actual size is 3.5gb $ ls -hl total 7.5G -rw-------. 1 root root 3.5G 2010-04-13 14:08 LFS.vdi How much size should I give when compiling and installing a linux kernel? Is there any guidelines to follow when doing this? This is my first time, so just experimenting with this. Many thanks,

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• Mounting a VirtualBox shared folder on boot with fstab in OpenSuse 11.3

  - by ccook

  I have followed the steps found here, however, the share is not mounted on boot. The share will mount if i run 'mount -a' after booting. Why would the share not mount on boot? 1 - Set up a Virtual Machine and install OpenSUSE 11.2 2 - Create a shared folder on host (HostFolder) 3 - Setup the shared folder in Virtualbox Via the Virtual Machine details or via Devices Shared Folders... 4 - Install dependencies for running the Virtualbox installer You need to install the right development kernelpackage for your machinetype (use 'zypper search -i kernel' to see what's installed) sudo zypper install make gcc kernel-source kernel-hosttype/default-devel 5 - Run the Virtual Machine and go to Devices Guest Additions This mounts an iso image in your OpenSUSE guest. 6 - Open a root terminal and run cd /usr/src/linux make oldconfig && make prepare && make scripts && make dep cp ../linux-obj/$HOSTTYPE/default/Module.symvers . make prepare A commenter on previously mentioned thread says this step is unnecessary but it doesn't work without on my system. I suggest trying step 7 first and returning to step 6 if that fails. * 7 - Run ./VirtualboxLinux yourhosttype .run from the mounted iso image. 8 - Create shared folder in OpenSUSE (GuestFolder) 9 - Test with sudo mount -t vboxsf HostFolder /home/user/GuestFolder It works? Great! Let's set up the system so it automounts for your regular useraccount instead of root-only access. 10 - Add this line to /etc/fstab HostFolder /home/user/GuestFolder vboxsf defaults,uid=1000,gid=1000 0 0 11 - It works for me but if it still doesn't automount after a reboot; sudo mount -a

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• Turn off monitor (energy saving) while in text console mode (in Linux)

  - by Denilson Sá

  How to configure Linux text console to automatically turn of the monitor after some time? And by "text console" I mean that thing that you get on ctrl+alt+F[1-6], which is what you get whenever X11 is not running. And, no, I'm not using any framebuffer console (it's a plain, good and old 80x25 text-mode). Many years ago, I was using Slackware Linux, and it used to boot up in text-mode. Then you would manually run startx after the login. Anyway, the main login "screen" was the plain text-mode console, and I remember that the monitor used to turn off (energy saving mode, indicated by a blinking LED) after some time. Now I'm using Gentoo, and I have a similar setup. The machine boots up in text-mode, and only rarely I need to run startx. I say this because this is mostly my personal Linux server, and there is no need to keep X11 running all the time. (which means: I don't want to use GDM/KDM or any other graphical login screen) But now, in this Gentoo text-mode console, the screen goes black after a while, but the monitor does not enter any energy-saving mode (the LED is always lit). Yes, I've waited long enough to verify this. Thus, my question is: how can I configure my current system to behave like the old one? In other words, how to make the text console trigger energy-saving mode of the monitor? (maybe I should (cross-)post this question to http://unix.stackexchange.com/ )

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• How to best tune my SAN/Initiators for best performance?

  - by Disco

  Recent owner of a Dell PowerVault MD3600i i'm experiencing some weird results. I have a dedicated 24x 10GbE Switch (PowerConnect 8024), setup to jumbo frames 9K. The MD3600 has 2 RAID controllers, each has 2x 10GbE ethernet nics. There's nothing else on the switch; one VLAN for SAN traffic. Here's my multipath.conf defaults { udev_dir /dev polling_interval 5 selector "round-robin 0" path_grouping_policy multibus getuid_callout "/sbin/scsi_id -g -u -s /block/%n" prio_callout none path_checker readsector0 rr_min_io 100 max_fds 8192 rr_weight priorities failback immediate no_path_retry fail user_friendly_names yes # prio rdac } blacklist { device { vendor "*" product "Universal Xport" } # devnode "^sd[a-z]" } devices { device { vendor "DELL" product "MD36xxi" path_grouping_policy group_by_prio prio rdac # polling_interval 5 path_checker rdac path_selector "round-robin 0" hardware_handler "1 rdac" failback immediate features "2 pg_init_retries 50" no_path_retry 30 rr_min_io 100 prio_callout "/sbin/mpath_prio_rdac /dev/%n" } } And iscsid.conf : node.startup = automatic node.session.timeo.replacement_timeout = 15 node.conn[0].timeo.login_timeout = 15 node.conn[0].timeo.logout_timeout = 15 node.conn[0].timeo.noop_out_interval = 5 node.conn[0].timeo.noop_out_timeout = 10 node.session.iscsi.InitialR2T = No node.session.iscsi.ImmediateData = Yes node.session.iscsi.FirstBurstLength = 262144 node.session.iscsi.MaxBurstLength = 16776192 node.conn[0].iscsi.MaxRecvDataSegmentLength = 262144 After my tests; i can barely come to 200 Mb/s read/write. Should I expect more than that ? Providing it has dual 10 GbE my thoughts where to come around the 400 Mb/s. Any ideas ? Guidelines ? Troubleshooting tips ?

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• Possible to host CentOS netinstall files on a local HTTP/FTP?

  - by garlicman

  I'm running XenServer on an Dell R610 and am running into a catch-22. During install from DVD, CentOS can't find the DVD package catalogue. It's a reported error for some, XenServer + CentOS6 + DVD install in some hardware configurations = failed install. Yes, I checked the MD5 and let the disc test pass. In every reported case, the netinstall was the solution. The issue is my net access is required to go through a web proxy that prompts before you can download a file. This naturally breaks any download automation. I've been waiting on our IT to put in an exception rule to allow my lab to bypass the prompt, but it's been over 3 weeks now and they don't seem responsive. (I've been working on this a day or two a week) I want to try and host the netinstall files local in my Xen network. Right now I only have a bunch of Windows based VMs, CentOS won't install so I don't have any Linux tools. I had tried simply hosting all the DVD contents off one of the Windows servers using Mongoose. (I didn't want to setup IIS) I copied them to a hosted sub-directory similar to all the mirrors out there (e.g. http:///centos/6.2/os/i386/) with no auth or anything. Then in the netinstall I correctly pointed to it. I now realize just copying the DVD files over won't work. The repodata will point to a local device, not the site I'm hosting. (e.g. the DVD repodata includes xml that points to where the packages are) Clearly I'm hosting them over HTTP, not from a DVD. Is there an easy way to sort this out? I'm just trying to install CentOS6 on Xen. If there's a turnkey downloadable Xen image with CentOS 6.2 on it, or a downloadable repo image, I'll take that too! Thank you in advance!

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• Correctly setting up UFW on Ubuntu Server 10 LTS which has Nginx, FastCGI and MySQL?

  - by littlejim84

  Hello. I'm wanting to get my firewall on my new webserver to be as secure as it needs to be. After I did research for iptables, I came across UFW (Uncomplicated FireWall). This looks like a better way for me to setup a firewall on Ubuntu Server 10 LTS and seeing that it's part of the install, it seems to make sense. My server will have Nginx, FastCGI and MySQL on it. I also want to be allow SSH access (obviously). So I'm curious to know exactly how I should set up UFW and is there anything else I need to take into consideration? After doing research, I found an article that explains it this way: # turn on ufw ufw enable # log all activity (you'll be glad you have this later) ufw logging on # allow port 80 for tcp (web stuff) ufw allow 80/tcp # allow our ssh port ufw allow 5555 # deny everything else ufw default deny # open the ssh config file and edit the port number from 22 to 5555, ctrl-x to exit nano /etc/ssh/sshd_config # restart ssh (don't forget to ssh with port 5555, not 22 from now on) /etc/init.d/ssh reload This all seems to make sense to me. But is it all correct? I want to back this up with any other opinions or advice to ensure I do this right on my server. Many thanks!

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• FTP not listing directory NcFTP PASV

  - by Jacob Talbot

  I am attempting to setup Multicraft on my server, all is running smoothly however the FTP won't allow anyone to connect from a remote FTP client, where net2ftp will work smoothly from a remote location. I have included the transcript from my FTP client, Transmit below to give you an idea of what's going on. I have disabled iptables as well, and still no luck either way. Transmit 4.1.7 (x86_64) Session Transcript [Version 10.8.2 (Build 12C54)] (21/10/12 11:23 PM) LibNcFTP 3.2.3 (July 23, 2009) compiled for UNIX 220: Multicraft 1.7.1 FTP server Connected to ateam.bn-mc.net. Cmd: USER jacob.9 331: Username ok, send password. Cmd: PASS xxxxxxxx 230: Login successful Cmd: TYPE A 200: Type set to: ASCII. Logged in to ateam.bn-mc.net as jacob.9. Cmd: SYST 215: UNIX Type: L8 Cmd: FEAT 211: Features supported: EPRT EPSV MDTM MLSD MLST type*;perm*;size*;modify*;unique*;unix.mode;unix.uid;unix.gid; REST STREAM SIZE TVFS UTF8 End FEAT. Cmd: OPTS UTF8 ON 200: OK Cmd: PWD 257: "/" is the current directory. Cmd: PASV Could not read reply from control connection -- timed out. (SReadline 1)

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• Can Subject Alternative Name accommodate multiple virtual mail domains?

  - by Lawrence

  I am currently running a postfix server with self signed certificates serving one mail domain, mycompany.com, the mail server is mail.mycompany.com and so is the CN of the certificate. Now, I need to add a new domain to it. The new domain name is mycompany.net to the same server. Since the users already have the root of the old certificate, I'd like to reuse that. However, I'd like to issue a new certificate so users using the SMTP from Outlook/Thunderbird of mail.mycompany.net do not get warnings. If I understand correctly, if I issue a new certificate with CN=mail.mycompany.com and a subjectAltName=DNS:mail.mydomain.net and have postfix serve this, the client will not complain either way about the cn not matching the target host name. Am I correct in this assumption or am I misunderstanding the concept of Subject Alternative Name? Just to avoid conversation, I do not want to have users on mycompany.net addresses use the mycompany.com server because I might (not a technical issue) have to split up into two different locations, and I want to produce an easily migrateable setup.

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