I am deciding to whether use OSPF or RIPv2 on my network. The key point for me is how good each of them are in dynamically adding and removing nodes. I am pretty sure that OSPF works well if a node is suddenly dropped or a new one is introduced( Please correct me if I am wrong). how good RIPv2 is at this.
View 1 RepliesI'm a starter here in linux, I have written a driver code and in that, I register my character devices by passing 0 for the major number.
To set up I used to use mknod command from terminal to create node,
Is there any method to create node dynamically from driver code during initialization and delete them at cleanup time?
We are running Oracle 10.2.04 RAC on Red Hat Linux 5 and when ever our SAN storage admin created new LUNS we have to reboot the servers so that server can see newly created LUNS. This causing downtime to our application. How we can add LUNS dynamically without rebooting servers. We are using device mapper mulitpath from red hat version 0.4.7-30.el5 and we have QLOGIC HBA's.
View 1 Replies View RelatedI have 2 routers in my network, R1 and R2. R1 is doing BGP with ISP1 and R2 is doing BGP with ISP2. both R1 and R2 are advertising the exact same a.b.c.d/20 network to their neighbor on BGP.
This setup is working perfectly fine, people can enter reach machines and services inside our network regardless of what route they come in through.
The problem i have now is that R1 is now catering for a specific VLAN. now if a packet is destined for a machine on that VLAN but comes in through R2, then R2 does not know what to do with that packet since it is not connected to the VLAN.
This could probably be fixed by adding static routes, but I want this to happen dynamically so in the future, when introducing more vlans the routing table is updated automatically.
Could this be fixed with iBGP or OSPF somehow? I am using Quagga routing software
command for adding a user and removing a user.
View 3 Replies View RelatedMy Linux OS is mounted on a LVM spread across an 8GB SD Card and a 4GB Flash Drive. I've used about 6GB and have about 2.xGB left. I'm trying to download Sabayon and I don't quite have enough space to store DVD size ISO. I have extra 2GB Flash Drive that I am not using and can converted to a PV and that would give me the necessary space I need to store the ISO. Now the ISO would spread from 4GB Flash to my 2GB Flash. My question is complicated, so bare with me. I want to know by adding 2GB PV into LogGroup and then remove it from the same LogGroup and then added back later. Would the data still exists and accessible? What happens to the data when I remove it the first time, would be automatically deleted, or stay hidden to plug back in?
View 4 Replies View RelatedI want to try out ubuntu with xfce, thing is, I don't know how to safely add and remove a desktop environment. Anyone know how to do this so I don't break ubuntu?
I don't want to install xubuntu, partially because I want to learn how to do this stuff myself.
What is a safe way of installing xfce and removing it if I didn't like it?
Server (LVM):
500GB
320GB
I want to install a new 500GB and remove the 320GB, of course moving the data on the 320GB to the new 500GB. I have an external 1TB in enclosure that I can plug in to move the data over, but how do I move only the data on the 320GB to it?? I found this [URL]. But that is only to move the data to a new replacement disk, but my external is only temporary to move the data from the 320GB until I remove it+install 500GB, then move the data back. Not enough space on the 500GB already on server to move everything from 320GB to it, just in case that seemed the obvious thing to do.
After a couple of years, I decided this weekend to replace my old slackware 10.2 with the latest stable version 13.1 64 bit. The change log tells me that with the new kernel 2.6, the old IDE/ATA system has been removed and the libata is used instead. That /dev/hda become /dev/sda and so on. No problem sofar, however ...
My FIRST hardware configuration was:
One SATA drives connected to the onboard SATA controller [A]
Two PATA drive connected to PCI IDE controller 1 [B & C]
Two PATA drive connected to PCI IDE controller 2 [D & E]
One PATA drive connected to the onboard IDE controller [F]
So initially the system had 6 disk drives. Booting from the Slackware install dvd, I found out that the drives are detected in the following order.
Onboard SATA controller
PCI IDE Controllers
Onboard IDE Controller
And the drives are get names in the following order:
/dev/sda : SATA disk @ Onboard SATA controller
/dev/sdb : first PATA disk @ PCI IDE controller 1
/dev/sdc : seconde PATA disk @ PCI IDE controller 1
/dev/sdd : first PATA disk @ PCI IDE controller 2
/dev/sde : seconde PATA disk @ PCI IDE controller 2
/dev/sdf : PATA disk @ Onboard IDE controller 1
sda upto sde are configured to us with LVM, so 4 disks are added to the volume group.
sdf is where Slackware is installed (sdf1 = swap; sdf5 = /boot; sdf6 /; sdf7 = /usr; sdf8 = /home; sdf9 = /var; sdf10 = /tmp)
Here is the problem:
When a 7th disk is added (another SATA drive @ Onboard SATA controller) then all names are changed like:
sda remains the same
sdb new added SATA drive
sdb -> sdc
sdc -> sdd
sdd -> sdf
sdf -> sdg
Obviously booting without LILO parameters results in a kernel panic, so I booted with: Linux boot=/dev/sdg root=/dev/sdg6. This does not give the kernel panic, but results in an option to check a drive and gives an option ctrl+d to boot normally. However it reboots and I get stuck at the same again.
How does LVM handle the naming shift of the drives? The 4 drives that are part of the volume group contain critical data!!! If needed, I can reinstall Slackware again from dvd with all 7 drives attached (to avoid naming shift), but how do I recover my volume group? What if one of the drives dies or is removed, then naming shift happens again.
I am going to remove root access via SSH which seems fine but I don't know how to add a new user, do I have to create a group first or are there existing groups I can add a user to, and does it matter which group I add a user to if I want this user to have root access with sudo?
View 11 Replies View Relatedi use a fedora distribution, when accessing administrator->add remove software (GUI) is there a way to know the download progress/download rate of the selected packages ? as i cant see any progress or indication on what is happening there..i know i can use the terminal to get packages but i was wondering if there is a way to see the progress when using the GUI instead of the downloading icon on the button left. as for ex an ubuntu distribution shows a progress of each package status while downloading as now i select the packages and it only tells me that it is downloading but on what speed or what are the packages left/downloaded i don't know.
View 2 Replies View Relatedi need to discover all network nodes and their ips is their a way to do it, then if i need to discover certain nodes which runs certain program. I'm using Fedora14 and FreeBSD
View 2 Replies View RelatedFirst, I installed CentOS 5.5 and Quagga 0.99.17.
Then I configure to run OSPF v2 on R1 and R2 following below:
I added --> #echo "1" > /proc/sys/net/ipv4/ip_forward to forward packet on centos
I've got my laptop working with my UNI's rather complex wifi setup.
I need to get access to my wpa_supplicant file so i can use it with my nook and a few other devices that i need to get wifi access.
Network manager, i know, does all the wpa stuff dynamically and through scripts, so is there any way that i can get network manager to generate my wpa_supplicant config?
I am setting up a computing cluster in my lab, as below. all the "eth0" IP addresses are static (for cluster communication) and the "eth1" of the front node is the only one connected to the internet through lab's DHCP server (which is connected to a centralized computer center in the university). The thing I wish to do is to do some sort of IP masquerading to enable all the nodes to have internet access. I actually google around and read some books. The similar things I came across is setting rules in iptables but I did not manage to get any of them working. I am using Ubuntu Lucid 64-bit on all machine.
View 6 Replies View RelatedMy requirement is to route ssh sessions from a single head node to multiple slave nodes. So what i want is, for a client there is just one point of entry (master/head node) to ssh into, it evaluates the load on the slave nodes connected on to internal network and routes the ssh session, kind of a ssh load balancer. Do you have any idea what open source solution i can apply for my problem?
I have tried using LVS piranha, it works well for http and https load balancing but not for ssh load balancing.
I know a bunch of commands and I am comfortable using the terminal, I even set a powerpc server but I can't figure out how to remove epiphany on this new computer I'm setting up. I didn't install anything with tasksel. I installed gnome and xorg afterwards... I load it up and 'startx' just fine. then I check around for the programs that were installed. I lik'em gimp, lot's of utilities. gedit. anyway I find epiphany, which I have already established that I dislike, I immediately go to the root terminal (another nice program that comes with gnome) and type apt-get remove epiphany-browser-data the output says it will be deleting gnome... however I have researched and found these are simpy meta packages that don't really matter.... however under the section that states all the packages that will be removed by autoremove there is a huge list... I doubt these packages are safe to remove. how to remove epiphany without removing a huge amount of probably needed software
View 14 Replies View Relatedwhat i did was, remove evolution mail from synaptic, what i wanted to do was just remove the indicator applet from the task bar. i read a bunch of bad stuff about removing evolution from synaptic vs just removing the applet.
im worried. did i break anything or put my security at risk. after, i used a command (older) (sudo apt-get install ubuntu-desktop)to install ubuntu desktop. because i thought that it would fix evolution. then i went to synaptic and installed a package called evolution. i rechecked evolution in applications menu. however, i notice that i have both a checkable evolution and two evolution icons. nothing 'seems' broken. im not sure if it ever was. and evolution calender pops up as normal, as does the the installed plain evolution. they both seems to be an exact copy of the other.
all i really wanted to do was remove the indicator applet. did i make a serious mistake. since ive had ubuntu, ive reformatted a lot because i was worried i made a mistake of some kind. however now im into the more "make a mistake and fix it stage' as im pretty happy with my current desktop and have worked hard to customize it. the command, sudo apt-get remove indicator-messages removed the mail icon. i still am worried that i broke something, or put my security at risk. also, now i have two mail icons. evolution mail and calendar, and another just called evolution.
These should be my last pleas for help with regard to Fedora 13. I've been unable to turn off the notifications that appear in the top right corner, despite a decent amount of searching on google. I can't remove any notifications package without removing a bunch of important software along with it. Also, F13 refuses to "Safely Remove" either of my external disks. I have to yank out the usb cord, touching wood each time.
View 5 Replies View RelatedI ise debian lenny on both server and nodes. Nodes are in sence of drbl drbl project.
So, my sendmail on server works well but on nodes in syslog i see:
Code:
Configuration of sendmail on server and nodes is same and it is:
Code:
How to set the anchor node in NS2? How to define the channel propagation model as Log Normal Shadowing instead of two ray ground reflection model in NS2?
View 2 Replies View RelatedI have a xml file and I read it within a php file with XML dom. This is the node structure of my xml file :
<Root><name></name>
<surname></surname>
<ID></ID>
<department></department>
[code]....
In the comment line, I've got the parent node of the current node. Parent node is "User" node. I would like to obtain the children of this parent node, say "name","surname " etc. How can I do this? Is there any function such as : "$parent_nodes->bringChildren('name')".
I'm working with computers that need to be public, so I'm trying to remove the social networking from 10.04.Unfortunately, this means that the "Indicator Applet" needs to go.The Indicator applet, holds the volume control.Is there anyway to add volume back to the panel after I remove the Indicator Applet?
View 5 Replies View RelatedI have a network camera, with a linux OS. We need it to be really precise in its timing for the specific application we want it for. But it's not!
After killing some of the garbage processes on it (and having some achievements, but not enough), it seems that there's some kind of bandwidth limiting applied on the outgoing traffic.
My question: What are all the things that should be done on a machine, running linux, to remove all the bandwidth limitations?
Notes:
1- With my very basic knowledge about traffic shaping in linux, I have made these observations:
# tc qdisc ls dev eth0
qdisc pfifo_fast 0: root bands 3 priomap 1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1
# tc qdisc del dev eth0 root
RTNETLINK answers: No such file or directory
2- I am trying to download the images from an HTTP link, and I already have about 14Mbps. I want it to reach at least 50Mbps. I can download with speeds higher than this when downloading from another PC on a windows network. So I assume this is not a problem with the cables. Also the eth0 on the camera is said to be a 100Mbps device.
I am facing a problem. I want to know how to add files to an already existing rpm. Not at the creation time of rpm. Because we have to add some files to it dynamically if any user purchases it from our webserver. I have searched everywhere but havent find any. Is it possible to do so?
View 1 Replies View Relatedi want to add keys to the sensor nodes. Hence i want to know whether there is any parameter for key storage in senor nodes
View 1 Replies View Relatedmy problem:
- i log into many linux servers (redhat, debian, suse, ubuntu)
- i want to set the terminal window/tab title to something like: time|ip|fqdn|pwd
the partial solution i found:
- declaring a function _setTitle() in /etc/bashrc
- setting PROMPT_COMMAND at all servers in /etc/bashrc, calling _setTitle is /etc/bashrc the proper place?
but i am i need of a command to set the title of the windows/tabs
solution should
- work for tabs and windows
- should use only builtins and avoid nasty cpu-wasting external forks
- work with common clients (windows/putty, linxu/gnome-terminal, linux/konsole)
- solution should base on cli, not on some gui like sshmenu!!!
This post isn't really asking for a tutorial, but rather asking for some ideas. I've come up with a few ideas, but they seem cumbersome and unnecessary, so I was wondering if someone with more experience than me could out. Also, my explanations suck, but I'll try to do my best. So say I have an executable called X. At some point during its execution, X loads and uses (using dlopen and dlsym) a library called Y. In Y, there a bunch of functions that call the function called, for example, void *special_malloc (size_t). These functions come from another linked library (linked during compilation) called Z. Problem is, special_malloc contains some static variables within its scope, and when those variables are reset midway through a program, an invalid free occurs (special_malloc uses garbage collection). Now, what I want to happen is that whenever lib Z calls special_malloc, it instead calls the special_malloc defined in the executable X, so that these static variables are retained. Keep in mind that I have control of the Z library, meaning I can edit the source to fit my needs.
View 2 Replies View RelatedI have a cluster script (CentOS 5.4) and I need a UPS for a shutdown. It should look like this ... The first node must wait until the second node has completed several actions and has been completely shut down. So I need a script with a shutdown wait until the other node is ... I was thinking of a test using ping. Alternatively, I would also have an IPMI interface. However, the "pause" may last a maximum of 10 minutes ... Then the wait must be ended.
View 10 Replies View RelatedI cannot seem to stop my computer from broadcasting an ad-hoc connection. I set it up using networkmanager, but now I cannot delete it. I searched Google and ubuntuforums for an answer, but no luck
View 9 Replies View Related