I have gotten my DNS servers up and running, and query against them using dig returns the proper information. How do I get the information to be distributed across the Internet now?
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Last year I was looking into fault-tolerant distributed file systems and I recall one kernel-based system that required a physical partition on each machine in the cluster, but would treat it as a single volume - ie. a write on one server would appear on the disk on all the servers.Unfortunately I didn't bookmark the specific system I was looking at, and now a year later I can't remember the details.What I don't want is NFS - a single file server with a file system mounted on various machines. What I do want is mirroring - one disk shared among multiple servers, so that if one server dies, it doesn't make any difference to the rest of them.
A bit of investigation turned up Red Hat's GFS, which kind of looks like what I want, but looks more and more like an NFS model to me. I was wondering what everyone's opinion of the various options out there were.
I'm using a program on a group of servers which contact each other using SSH. I've got the authentication keys setup with no password but when one box tries to connect to another it wants the password for the user it's trying to communicate with. So the main problem is there is a lot of communicating within this program so it's important to allow each box communicate with each other without the use of a password. I'm using OpenSSH 4.3 with OpenSSL 0.9.8 on Red Hat Enterprise Linux Server 5.3 (Tikanga). I'm also using SSH on Ubuntu(Intrepid) to connect to these servers at the mo as i don't have direct access to the boxes.
View 4 Replies View Relatedrunning Ubuntu 10.10 and mozilla and seamonkey... Tried to access a website: [URL] and got the error: The page cannot be displayed You have attempted to execute a CGI, ISAPI, or other executable program from a directory that does not allow programs to be executed. Please try the following: Contact the Web site administrator if you believe this directory should allow execute access. HTTP Error 403.1 - Forbidden: Execute access is denied. Internet Information Services (IIS)
View 1 Replies View RelatedI'm trying to understand how deb packages work. Are there source debs?I assumed there were, but from[URL].. I see that source is distributed in a GZipped file.
View 3 Replies View RelatedI'm planning on setting up a new Linux box expressly for distributed computing (BOINC, SETI@home, etc.). All things being equal, what's better- More clock cycles or more cores?
View 4 Replies View RelatedI'm looking for the best distributed filesystem to share my home directory among all my computers, and I'm interested in what advice I could get here.
Here are my requirements:
1) It must be completely POSIX compliant, because I've noticed that many programs will break if not.
1a) Must support file locking (i.e. flock()) preferably sharing lock advisories between the clients
1b) Must support hard links, and be able to recognize a hard link connection by looking at the number of references
2) It must have encryption, and security suitable for it to be exposed to the internet.
2a) I would like to use password-less authentication. Preferably SSL client certs (HTTPS style). Static keys (SSH style) are also fine. I would begrudgingly accept a password authenticated system if it used a fairly secure challenge/response algorithm if it met all of my other requirements. (Extra points if it supports PKCS#11 and thus supports smart cards)
2b) Encrypted traffic must be an option.
2c) No thanks to kerberos. It was too annoying to maintain when I tried it before and I don't like passwords.
3) Preferably, it should be stable and fairly easy to maintain.
4) Optionally, it should be tolerant of network drops, and reconnect automatically as needed, because my laptop wireless is a little flaky sometimes.
I'm built an distributed application, and now I want to take some metrics to show how my application works. These metrics includes the time of computation, the time of communication and the amdhal law. I would like to know what tests can be done to show the performance of the application. So, I'm searching for a book or document that shows me what type of tests can be done to show the performance of an application.
View 2 Replies View RelatedA bunch of hosts all connected to each other.I'd like to have a directory where a group of hosts can dump files and all access, synchronising with each other their changes automatically and transparent to the user.How can I have it so that rsync updates both ways?
* host A asks host B for a list of files, modification dates, checksums
* then applies the rules to select which files it will fetch from B
--> if A owns the file then do not get modifications from B
--> files differ, then select newer file
* then fetches them
* and so on for each host...
I have a fedora 10 live CD currently i m running win XP with SP2 with the following configuration
Pentium 4 2.4 GHz
512 MB of Ram
160 GB HDD
INTEL d845 GVSR mother board
When I pop the live CD and reboot my system, the fedora 10 starts loading, it comes onto a select proper keyboard and after I clicked on the Next button tha app hangs. I used distributed CD and loaded iso images - result the same.
I'm trying to write a program which would get information from a webpage and display the information on my desktop sort of like a widget. I kind of remember there being something like this already made, but for the life of me I can't remember what it's calledDoes anyone know?
View 1 Replies View RelatedI want to know the details about the implementation of distributed firewall in a local area network
View 5 Replies View Relatedis there a way to set-up a file system, where you have multiple nodes (PC's) linked to one storage pool? ZFS seems to support this idea with multiple disks on one node, but could you connect multiple nodes in this manner?
View 3 Replies View RelatedI am currently looking for a file system that needs to be distributed over several nodes and need redundancy, like RAID5, and the ability to grow if needed, like LVM. Also not all nodes are going to be located in the same data center, but I guess that's not that important as long as the connection between DCs is sufficiently fast. I am currently looking at AFS, Coda, GFS and OCFS to see if they have what I need.
Edit: I just figured that it may be better to have the RAID5-like setup within one location, and have RAID1-like mirroring between the locations. That would probably better for performance, right?
i want to know about eth0..that where information is saved from eth0?in which file? and how to take input from that file? what will be the script?
View 5 Replies View RelatedHow would you make NIS user information override local user information on client systems? This is what I think is right? Add nis on the passwd registration file on the second line Is this correct?
View 1 Replies View RelatedHow can I get information similar to proc/net/wireless but for more than just the wireless router I'm connected to. I know there has to be a way because when I'm disconnected from all routers the network manager shows signal strength of all available routers.
View 3 Replies View Relatedhow to check the all device information on ubuntu
View 1 Replies View RelatedI'm not too sure if this is the right topic to post in but if it isn't please move it to the correct topic. I recently opened some ports for my Playstation 3 and the connection test on the PS3 tells me that the ports are open . But when I execute this command
nmap -p 0-60000 192.168.1.5 I get this
Quote:
Starting Nmap 5.21 ( http://nmap.org ) at 2010-10-16 20:54 AUS Eastern Daylight
Time Nmap scan report for PS3 (192.168.1.5)
Host is up (0.00063s latency).
All 60001 scanned ports on PS3 (192.168.1.5) are closed
MAC Address: **:**:**:**:**:** (Sony Computer Entertainment)
Nmap done: 1 IP address (1 host up) scanned in 4.12 seconds
I could be executing the wrong command or something but I have read through the manual and couldn't find anything that helped. I have tried this command on other machines that I have opened ports for and get similar results except for a few Ephemeral ports (80,443 etc.) which also makes me wonder why these aren't listed as open on the PS3?
When I attempt to add software i get the following error:
Unable to Retrieve Software Information
This could be caused by not having available connection.
Cannot find a valid baseurl for repo: addons
To get my browser to work properly, I have to specify a proxy (manual) and use the IP address of our proxy server. After this, I'm able to get out through the internet
using my browser. Not sure why I fail to get software updates though. I used the same setting in Proxy - Control Center. Repository Manager show's CentOS-5 - Addons mirror list as :
[URL]
..and I can get to the site with the browser.
How do I get information about the SIM card of my USB broadband modem, for example it's phone number, serial number and so on, in Ubuntu 10.04?Not about the usb modem itself - just the SIM card inside it.Is there a way to probe it from the terminal, like you probe for usb devices with lsusb?
View 3 Replies View RelatedIs there a way to show print all zones and associated records in BIND?
View 1 Replies View RelatedI have a working network Ubuntu 10 Win7 (thanks to you guys on this site).
My last hurdle is how to mount folders or disks from Win7 onto Ubuntu.
I used a tutorial, and got fstab installed I think...
Where do I get the information to PUT IN fstab and WHERE to put it?
Here is my fstab file code...
I'm trying to set up a VPN for my home so I can ssh from my Mac to the linux desktop on my LAN remotely, but I have no idea what to do. The internet seems to suggest using a VPN, but I have no idea what's involved with setting something like that up, and I'm not even sure that's what I need to do. The linux desktop is on my LAN along with a few windows xp computers, if that matters. Does anyone care to either help or point me in the direction of good information (preferably suited for networking beginners)?
View 4 Replies View Relatedi have been using ubuntu for just over 3 months now and i completely love it. but heres where the problem starts (and please let me know if i am in the right topic) i recently installed ubuntu 10.10 on my roommates computer, the reason being is that the IT department here on college "fixed it" for him, now it wont connect to the internet. it will however connect if we use an ethernet cable from the other laptop to his. his had originally windows xp then got upgraded to vista. i was wondering if there was a way to completely reset the networking wifi card if that might be the problem.
my roommates computer is a DakTech PlaidBook, however i do not know on how to check the system information in the terminal to tell you what wifi card he has and such, all i want is to have internet back on his computer again.
I have a network connection between 3 computers sharing the same net bandwidth with the same router (modem), I wanted to know how much every one of this network taking from the bandwidth, I want an easy program like switch-sniffer (see the pic) to scan the network and tell me how much every one taking from this network in real time.
View 14 Replies View RelatedI have been playing with Linux consistently for a couple of months now. I've been a Windows sys. admin for most of my career, so Linux is pretty strange for me. I started off with computers way back with the TRS-80 and then eventually moved to DOS systems. So the command line interface (CLI) of Linux was not completely alien to me, yet my lack of knowledge on the syntax and commands is holding me back. I have come a long way.
Recently I needed to play around with some DNS settings and one of the commands I used frequently in Windows, IPCONFIG /ALL, doesn't have a direct relative that displayed the same information. If you run ifconfig, it doesn't return the DNS servers you are currently using. You have to run a separate command to retrieve that information.
What I have done is created a super simple script that displays the network information for my primary LAN adapter, which is ETH0 in my case. After that, it shows the domain and name server information. Then it pauses for 20 seconds before closing the terminal window.
Here are the contents of the script file:
ifconfig -a eth0
cat /etc/resolv.conf
sleep 20
I simply right-clicked the Linux desktop, choose Create Document, Empty File. I named it something like Network Info. Then I opened it and put this information in it, saved it, and closed it. I renamed the file and added a .sh extension to the end which makes it into a script file. Next, right-click the script and go to properties. In the Permissions tab, check the box next to Execute: Allow executing file as a program. Then click close.
To run the script, just double-click the icon and then click Run In Terminal at the prompt. The terminal window opens, displays the information, and exits after 20 seconds. If you need it longer than that or need a different interface (such as wlan0 for your wireless), you can change or even add that in.
This was all done in Ubuntu 10.10. I know it is very simple and very straight forward and welcome thoughts and feedback about simpler ways to do this. For me, the old-school Windows admin, it's a baby step in the right direction. I am really enjoying learning the Linux OS.
I have to fetch the information present in MIB of network agent.. i dont how to strat my program. pls text one sample program.
View 3 Replies View RelatedAll routing settings made with the ip tool (route command) are lost when the redhat server reboots.How to save routing information to a configuration file?
View 2 Replies View RelatedIs there any tool in linux to show information on AS numbers? code...
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