Server :: Use The SAN Directly WITHOUT FibreChannel HBA Mapping / Mounting
May 9, 2011
recently we got a Dell/EMC DX300 storage I want to use it on a HP g4 with CentOS 5.6 and an Emulex LP HBA
* on the storage side the server is logged in, and registered with a RAID6 LUN (0)
* on the server side, the HBA driver (lpfc) is loaded & working
how can I use the SAN directly (WITHOUT multipath/powerpath/... -for first step/testing-)??? I don't have any associated device:
lsscsi:
...
[5:0:0:0] disk DGC VRAID 0226 -
nor in the /dev/disk/by-path or ../* folders
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May 24, 2010
i need to ask how can i stream live video from my usb web-cam that is attached directly to my server.
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Jul 3, 2010
we have configured snv in our server but when we tried to access our svn folder from client its saying path not found error.This is because apache is mapped to tomcat so when we tried to access svn by default it looks to some other path and displaying path not found error.My question is how to restrict apache from forwarding its request to tomcat or else how to stop the tomcat service. I am using centos and i tried with /etc/init.d/tomcat5 stop but it is not getting stopped.
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Oct 26, 2010
I'm configuring a postfix server for the company I work for and have a question about limiting access by IP address.
First off, we're not using this for SPAM. We're a manufacturing/direct marketing company and will use the email server to contact our salespeople. We do not send UCE. That said, we have had problems in the past with our legitimate email being labeled as spam by a few carriers. This email server is being setup specifically to avoid future problems on that type.
Because of the nature of our business we operate several domains. We want to be able to limit outbound email for a given domain to a single IP Address. For example, say we have have 3 domains - a.com, b.com and c.com - and 3 IP addresses - 1.2.3.1, 1.2.3.2 and 1.2.3.3. We want to set things up so that a.com can only send out email on 1.2.3.1, b.com can only send out email on 1.2.3.2 and c.com can only send out email on 1.2.3.3.
My first impulse is to set these up as virtual domains on the Postfix server but I'm not sure that's the best method. Are there alternatives? What are your recommendations for doing this?
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Mar 15, 2010
So I am trying to setup a Samba server to share out our SAN environment to our windows clients. This is my first time playing with samba, so running into quite a few obsticals along the way.
Environment:
SLES 10.3
Samba 3.0x (Original RPMs in distro)
My end goal is to allow anyone in our Active Directory environment to access the shared folders from Samba and map the File permissions to 755 and Directory to 777.First I tried just using Kerberos client and winbind and added it to the AD domain. This worked, but mapped the wrong UIDs (the standard 10000 series). Also the permissions were mapped all wrong.Then I had the great idea to use the Server for NIS on windows 2008, it makes the PDC run a NIS domain that is conjoined to AD. This really didnt work at all. I loaded the AD schema with the correct UIDs and all that good stuff, but didnt seem to take.
So how would any of you approach this?Should I keep trying the NIS config, or use Kerb and winbind? Can a box be part of a NIS domain and AD at the same time?
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Apr 21, 2011
I use opensuse 11.4 with TightVNC Server version 1.3.9. I use french keyboard mapping (yast configuration).When I connect with putty via ssh all is ok (keyboard mapping). But when I use tightvnc viewer on windows the mapping is not correct.I've verified many time the configuration of the keyboard in yast (graphical) and desktop options (french mapping). I can't map correctly. It seem there is no issue with direct attached keyboard.Another strange behavior is the shift key. I want to use . (need to press shift + and this put a >. But sometime if I press "shift + ," before then "shift + ;" it works.
I've passed long time on google and find no answer yet.Is there a issue with tightvnc server ?A bug with tightvnc viewer ? (I've tried with realvnc and same results).
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Feb 19, 2010
Posted in wrong section. Moved to Linux Servers Forum.
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Aug 26, 2010
So I have a few Ubuntu (Hardy till I can find a replacement for Xen) boxes that I am trying move from nfs3 to nfs4.I set it up according to this guide: URL...However I ran into trouble when the client see's all users/groups as nobody/nogroup.The current set up is that all the boxes have synced uids/gids and all users with root access can be trusted. I read some reports that said the only way this could be fixed was by using Kerberos. However I would really prefer not having to move to Kerberos as I have heard that it is very intensive to set up. So what I am looking for here is a solution other than sticking with nfs3 or putting everything on Kerberos. However if you think that Kerberos is easier to set up than I am giving it credit for then that could be useful to hear as well.
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Aug 28, 2010
I keep getting the error "reverse mapping checking getaddrinfo for fileserver.0.0.10.in-addr.arpa [10.0.0.10] failed - POSSIBLE BREAK-IN ATTEMPT!" in /var/log/auth.log I have a DNS (bind9) setup on my Linux router with the following config:
Code:
router:~# less /etc/bind/named.conf.local
// Local zone definitions here.
zone "0.0.10.in-addr.arpa" {
type master;
file "/etc/bind/db.0.0.10";
[Code]...
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Nov 23, 2009
I have my webserver with cpanel , and I have a FTP location. I wanna backup to the FTP location directly, because I dont have enough space on the server to back up first then rsync over the data, I have this script I need a little help in getting it to backup directly to the ftp location , or is there a simpler way .
Code:
#!/bin/sh
# System + MySQL backup script
# Full backup day - Sun (rest of the day do incremental backup)
# Copyright (c) 2005-2006 nixCraft <url>
# This script is licensed under GNU GPL version 2.0 or above
code....
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Feb 17, 2011
Here's the setup:
- SSH server on Maverick
- Connecting from Windows XP via putty
- XP Firefox using SOCKS proxy over SSH tunnel
What I would like to do is use XP Firefox to download large files from various file-hosters (Rapidshare, Hotfile...), but download them straight to Maverick instead of forwarding the download to XP. Right now, my only option is to remote desktop into Maverick and download it using Ubuntu's Firefox. And simply using wget did not prove to be simple.
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Feb 1, 2011
Is there away to resolve the hostname after creating a new subdomain. So we don't need to wait internet need some times to able to resolve the hostname. For example, if I add new subdomain to "test.example.com", I can directly ping to this hostname from internet.
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Apr 8, 2010
Is there a way for me to mount a raid array member directly without using any of the raid tools? For instance, I have a raid 1 array that contains /dev/sda1 and /dev/sdb1. How can I mount /dev/sda1 or /dev/sdb1 directly? Doing mount /dev/sda1 <mnt point> does not work. If I try specifying the filesystem type with -t this doesn't work either.
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Sep 30, 2010
I am trying to read a file uploaded by a simple <input type="file"> form and directly write it to a mysql blob - without saving it to the filesystem.
I tryed something like:
Code:
It writes some few Bytes to the DB and there is no error, but it's not the actual file that is being written.
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Sep 26, 2010
Trying to set up VSFTPD on the CentOS 5 box at work, which is an internal web development server. I'm leaving soon, and all knowledge of or desire to learn SSH is going with me so the other employees will need to be able to access the web root using FTP clients.
Essentially there is no need for special user accounts or privileges, it's an internal server in a tiny company. I've got the LocalRoot set to /var/www/ which I can log in to and read all files via FTP, however despite setting everything to 777 in /var/www/ and below, I still can't get any write privileges on the FTP server.
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Mar 11, 2011
I am working on building a customized ISO image of a server based on linux. The thing is after the server is installed and run for the first time, three users have to be created for the various services to run properly. I want this to be automated. To achieve this what is was thinking is automatically enter the user entries in the /etc/passwd and /etc/shadow files through init scripts when the server starts for the first time after the installation. I tried creating user and assigning password in one of my machine, and the /etc/passwd and the /etc/shadow entries of this user I copied it into the other machine and tried login in on the other machine and everything worked fine. How I am trying to achieve this.
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Jun 23, 2011
I have a computer with grub installed, and nothing else. I'd like to install Debian on it without having to burn a CD. (and I don't have any flash disks.) It has a nice ethernet card, and I have another computer right next to it with an ethernet card. I also have an ethernet cable. However, I don't have any router free which I can mess with for these purposes. As I've looked up, apparently modern Ethernet cards don't need crossover cables, normal cables will work for this type of connection.
I've tried several different "tutorials" on how to set up a netboot server, but
None of them are complete. All of them assume that you understand how DHCP works, and that you can do things like set up a dnsmasq server. I don't understand the DHCP protocol, with submasks and whatnot (I know that it is the protocol for assigning computer network addresses, and that's it), and I don't think I should have to in order to simply connect two computers. All of the tutorials give you incomplete configuration files, and ask you to fill in things which I don't understand, and for me it doesn't make sense to customize these settings, as I just want to connect them and I really don't care what ip address the TFTP server has or whatnot. All of these assume that you are going through a router. I am not. When I try googling for ways to directly connect two linux computers with an ethernet cable, I can't even find instructions, just more references to "you need crossover cables".
So basically, I have two computers directly connected by ethernet cables. Tell me what packages I need to install, what the contents of my configuration files should look like, and what, if any, commands I need to run in order that when I turn on my second computer, and select network boot, it will start up a minimal debian system.
EDIT: Hmmm, it looks like I actually have a linux kernel installed too, but no root filesystem (so no other programs besides busybox).
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Jan 20, 2010
How to communicate with an SMTP server with telnet, in order to send a mail?
telnet smtp.something.somewhere 53 Trying
10.xxx.xxx.xxx...
Connected to smtp.something.somewhere.
Escape character is '^]'.
And that is as far as I got. What do I have to do after?
What do I have to write after "HELO"?
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Apr 12, 2011
I was experimenting with new splash screens in the plymouth manager when my ubuntu stopped loading into the gnome desktop. Ive tried to search for some solutions over the internet but i cant seem to find any. and to top it all of, the server from which i used to get updates from seems to have stopped running.i need help in changing my server via the terminal and to help restore my gdm.
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Jul 1, 2010
venturing into unfamiliar territory so I'm hoping someone can help me and make things a little more understandable for me. I have setup Postfix on a standalone server connected directly to the internet. I have got inbound and outbound email working for the most part, but I am worried about security.My fear is that if I leave port 25 open to the outside world spammers will find this and start relaying mail through it and eventually blacklisting the IP attached to this box.
For now, I am hosting mail for a single domain and single user (me) with a few aliases. I plan on expanding to IMAP and SMTP access from the outside at some point, but for now I've been using Mutt in a shell and it's fine for my needs for now.
Here are my current Postfix settings:
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
[code]....
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Mar 25, 2011
I created a lab of 15 PCs connected to a server using samba. Everything works fine, but it's possible put a link on the desktop that points directly to the shared folder on the server?
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May 19, 2010
I have a NIS server and a web server as a client. I have a regular linux user (without root privileges) "techsupport1" on NIS server.
On the client web server, I have root user, and my clients. Now what I want to achieve is, allow my user "techsupport1" to access the web server, but instead of logging in using root user, I'd like the client to use username "techsupport1", but in the same time, give that user root privileges on the web server (client). The reason, is that I have more than one user who need to manage the web server (client), so I want to be able to clearly see in the bash_history, who has been running what commands. right now, when I login as a techsupport user to the web server (client) from my NIS server
[code]...
I don't have root privileges, also my gid is matching to gid of a customer who has the same 517 on the web server. How can I configure, so when a tech support agent 1, logs in to web server, NIS grants root privileges, but keeps the techsupport username?
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Aug 2, 2011
Setup1: Two rack mounted servers with a common storage device serving as the home directories for users on the servers. The storage device is a gfs partition mounted on the servers as the home directory using SAS cables. These servers have RHEL 5.4 as the installed operating system.
Setup2: A standard tower server with Debian 6 as the operating system used for tape backups. This has a tape drive connected to it.
Question: How to mount the storage device of setup1 using NFS on the server in setup2.
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Apr 1, 2010
Friends i have an idea to broadcast few local TV channels to the world via internet.But friends i can't directly broadcast from my country because of bandwidth.friends is there a way to do this through a remote server server? i just need to input my stream to a remote server and then broadcast it from the server.I can stream channels to the server from my country through a 10mbbs connection.
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Sep 13, 2010
I have an XFS filesystem (not my root filesystem) that is not mounting.
We had a power failure over the weekend. All but one of our XFS mounts is comming up. Its a large mount (2TB) and I am not seeing errors per se...
But after attempting to mount it, it has been 4 hours and all we see in either dmesg output or in the messages file from the kernel is:
Our mount process is dead and I don't see any disk i/o going on. Am I missing something here on this?
I rebooted the box once earlier and was able mount read-only with norecovery...
I tried xfs_check and it also produced a dead "xfs_df -i -p xfs_check -c check /dev/sdd1"
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Dec 27, 2010
I have configured an nfs server like this: #vi /etc/exports /var/ftp/pub*.dell.com(rw,sync)& configured yum server from client yum update is working but by using nfs method if i am trying to mount i am getting this message mount 192.168.0.254:/var/ftp/pub failed,reason given by serverermission denied
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Sep 27, 2010
I have some problem when i want to mount a directory from another server, this is the detail information:
Server : 192.168.2.83.
-> cat /etc/exports = /simprela1 192.168.10.129/255.255.255.0(rw,no_root_squash,no_subtree_check)
Client : 192.168.10.129
[code]....
It's work very well until i try restart my client server and the mount from 192.168.2.83 is gone, if i want it work again i must run mount script again. Can it become the permanent mount, so when i restart my server the mount is already exist?
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Mar 24, 2011
- we have a bunch of linux servers.
- lots of users work with linux Desktops. They use them as testing servers.
- All the infrastructure has the Authentication services linked by Quest Auth Services againts an AD. This gives us the option of logon scripts, startup scripts, and other things.
- One interesting option this Quest thing gives us is SUDO management. We can edit sudoers file by GPO politics.
- Now we are deploying a NAS server from Hitachi with cifs and NFS mapping capabilities.
- Servers are managed by IT, so nobody can go root except us.
- Desktop users will also mount the NFS shares so they will be able to work with real data and read their own data from servers.
- Desktop users can go sudo su.
- If desktop users go from root to another user, the NFS let them work as they where the other user.
I would like to keep them from swithching users, but only between AD users, they must be able to switch to apache user or postgres user.
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Jan 27, 2010
I want to be able to mount an ftp account to a local folder, I have set up a ftp server that is working fine, I have tested it with a few windows ftp clients and it works fine. I am trying to use CurlFtpFS to mount it to /backup as I know it is supported but am running into an error I cant get around. I have tested that my box can access the server using the ftp command, see below
Code:
root@Fileserver:/# ftp 192.168.1.254
Connected to 192.168.1.254.
220 (vsFTPd 2.0.6)
[code]....
but when I try to use CurlFtpFS I get a Error connecting to ftp: Access denied: 530" error, see below
Code:
root@Fileserver:/# curlftpfs ftp://192.168.1.254
Error connecting to ftp: Access denied: 530
root@Fileserver:/# curlftpfs ftpuser:ftpPa$$w0rd@192.168.1.254 /backup
[code]....
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Jul 19, 2011
I'm trying to build cluster computer system using redhat linux enterprise 5.5. And I'm on the step to set up the NFS mounting. (step 3 of part VI on this paper: However, I kept getting "permission denied" when I used the command "mount -t" to mount the slave node onto the hard drive of the master node. Even when I edited /etc/fstab file to make it automatically set up during booting, I still receive the same result. By the way, I've already logged in as a root user on both slave and master nodes.
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