General :: Control Process From Web Site
Feb 11, 2010What would be the best way to kill or start a process from a web site? Additionally, how could I get the output from the process and display it on the site?
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General :: Process Control From Boot Loader To User Space
Jun 29, 2010For the past few days I was putting effort on understanding the software control flow starting from "Boot loader" to "Linux User space".
I am consolidating the entire process and putting forth in this forum...It would be great if someone can validate this..It might be useful to other new bees too.
Step 1 : Power up the board
Step 2 : The CPU control goes to EEPROM/storage memory where BIOS resides
Step 3: BIOS gets loaded in RAM and gets executed
Step 4: During execution, the selection of Boot device has to be done with the help of BIOS Menu [Blue screen appearance during start up in normal PC's]
Step 5: BIOS shall access the Bootloader stored in boot device [for eg.,Hard disk]. Boot loader is stored in MBR area.
for explanation purpose I take the following configurations
Bootloader = GRUB
Boot Device = Hard Disk
Step 6: GRUB shall be loaded in RAM and gets executed
Step 7: GRUB shall load the KERNEL image to RAM. Kernel image is stored in Hard Disk.
The question of "How the GRUB knows where the Kernel image is stored".
The answer is
1. In the "Grub.config" file, the location of "Kernel Image" and " Ramdisk Image" [which will be discussed later in the section] is being given.
Step 8: Kernel Image followed by Ramdisk Image is loaded in RAM by GRUB bootloader
Step 9: Kernel Image gets executed...During execution, top portion of the code shall make initial hardware initialization and latter part
of the code shall just decompress the Kernel Image
Step 10 : After decompressing the Kernel Image, it shall decompress
the already loaded Ramdisk Image
Ram disk is just creating a temporary hard disk in RAM. The main responsibility includes it consists of minimal driver files, executables, directory structures to created a TEMPORARY ROOT FILE SYSTEM.
This Temporary Root File system shall be used by Kernel Image
1. Execute the executables to access the Hard disk
2. For creating Permanent Root File System in HARD DISK
Step 11 : Kernel Shall look for the file /Linuxrc in Ramdisk. Linuxrc
is a USER script file [not sure]
Step 12: At the end of script file Linuxrc, the Ramdisk shall give the
control to "USER SPACE" [path for writing the script not known]in Linux kernel
Step 13: USER SPACE is the normal shell
Security :: Is Server Under DdOS Attack - Not Having Much Load And Only Few Process Runs But Site Opens Very Slow
Aug 5, 2010I have a server and i think that my server is under Ddos attack. i see that server is not having much load and only few process runs but my site opens very slow. i executed the following command on my ssh:
[Code]....
Fedora :: Akonadi Control Process Not Registered At D-Bus
Feb 8, 2009Test 9 brings up this error:
Code:
Test 9: ERROR
--------
Akonadi control process not registered at D-Bus. Details: The Akonadi control process is not registered at D-Bus which typically means it was not started or encountered a fatal error during startup. How can I solve this?
F10 x86_64
akonadi-1.0.0-4.fc10.x86_64
mysql-5.0.67-2.fc10.x86_64
Programming :: Perl - Process Control As Different Users?
Jan 10, 2010I need to control daemons like dhcp/bind from within a perl script. I could run the script as root to restart/stop/start the daemons however, this is not good for security.
What are the ways of controlling processes within perl as different users?
Programming :: Can Expect Return Control Of A Spawned Process To A Shell Script
Nov 19, 2009Is it possible to have an Expect script spawn an SSH session, log in, then go into interactive mode and give control of the SSH session to a Bash script? Here's a simplified example of the script so far:
Code:
#!/bin/bash
expect -c "
[code]....
Debian Installation :: System Booting Process Stops Halfway - Job Control Turned Off (initramfs)
Jun 4, 2015Although I'm a linux user, I don't know much about the whole booting process myself. I normally have a friend that I can consult when things don't go the way I expected. But here's the thing: he updated my computer and went away. And of course I can't reach him and I really need it to work. And moreover, I want to be able to sole things myself.
The booting process stops halfway. The last thing it says is: can't access tty: job control turned off (initramfs) ...
Ubuntu Servers :: Openvpn Site-to-Site : Impossibile To Ping Client On Subnet?
Jun 25, 2010I have to ubuntu machine (9.10 and 10.4) with a openvpn tunnel between them.This is the situation:
Code:
NetworkA 192.168.0.0/24
|
UbuntuA br0:192.168.0.3 (openvpn bridge between eth0 and tap0)[code].....
UbuntuA has one only interface etho and there are two openvpn instance: one bridge istance with br0 and another instance with tun0.
UbuntuA is not the gateway for networkA. UbuntuB is the gateway for NetworkB.I need to comunicate between pc on networkB e those on networkA.This is the "ping situation" (no pc tested has an active firewall):
ubuntuA vs ubuntuB: OK
ubuntuB vs ubuntuA: OK
pc on NetworkA vs ubuntuA and ubuntuB: OK[code].....
Networking :: Enabling Full Routing Site To Site With Openvpn Not Using Masquerading?
Jul 27, 2010I've been on a quest to enable full routing through my openvpn tunnel between my office and the colo. Masquerading will work, however it will throw off anything key based and makes a lot of things just more difficult and vague in general. Is there an easy way to do this via iptables? I tried using quagga hoping it would magically solve my problems, however it does not seem to do my routing for me . I just did a basic static route within zebra...
View 3 Replies View RelatedNetworking :: Site To Site Vpn Racoon With Cisco Asa 5505 Routing?
Mar 25, 2010I have three locations with a central office connected to two remote locations. At the central office I run on a cisco asa 5505 two site to site vpns. The remote end of the first site is a checkpoint firewall , and the remote end of the second site is racoon on debian. Both sites are up and working. However, where at the first site traffic goes both ways, at the second site it only works from the central office to the remote office.
For example, I can ssh from a host in the central office to a host in the first remote site (through checkpoint firewall,) then ssh back from that host at the remote office to any host in the central office. In contrast, after I ssh from a host in the central office to a host in the second remote office (through racoon), I cannot see the central office hosts (ping the ip address of a central office host, ssh, etc. all fail.) The vpn settings at the central office (the cisco asa 5505) are identical. So it seems to me that some routing magic is missing on the host running racoon at the second remote office. Where would such setting reside? racoon config files? iptables?
Security :: Site-to-site Ouija Board Connection?
Oct 3, 2010Maybe a site-to-site Ouija board connection.
View 5 Replies View RelatedServer :: Control Which Drive Letter USB Thumb Drive Gets Assigned During Install Process?
Mar 30, 2010The software: Ubuntu Server Edition 9.10.The wetware: A programmer doing his best (read: ignorant, shitty) as an ad-h.When I plug the USB thumb drive in, the install OS gives it a drive letter -- /dev/sdb -- and it pushes the original /dev/sdb down to /dev/sdc. The installation works without a hitch, and GRUB2 installs, dutifully pointing the root at /dev/sdc1 instead of /dev/sdb1.I let GRUB2 start normally ("drive not found"), holding the <shift> key to get to the "rescue>" prompt.From there, I issue "ls" to discover that GRUB can NOT see /dev/sdb, and I can tell that because what is showing up as (hd1) does NOT have three partitions as it should.GRUB2 sees a total of 16 drives, not 26, and one of the drives it sees is "fd0" (there is no floppy drive).Issuing commands like "set prefix=(hdx,y)" and "root=(hdx,y)" have no effect as, I think it's just pointing to the (reiserfs)content drives and this GRUB2 tells me "unknown filesystem".I did try them all in vain, hoping that maybe I'd find a kernel somewhere.I used the "rescue" mode of the Ubuntu installer (the USB thumb drive) to get to a root prompt.From there, I mounted /dev/sdc2 (the "shifted" /dev/sdb2) onto /mnt, I mounted /dev/sdc1 (the "shifted" /dev/sdb1) onto /mnt/boot,and then I chroot'ed to /mnt.I edited /boot/grub/grub.cfg, editing every instance of "root=(hd2,1)" to the appropriate UUID for the "real" /dev/sdb1. Then I issued update-grub2.It refused to work giving me an banal "no such partition" error or something like that.
We originally had this server functioning by putting / and /boot on the SS SanDisk, which caused no problems during installation because /dev/sda doesn't get shifted.We then figured it was a good idea to put our OS files on something with failover capability. And that started us down this crappy "shifting drive letter" path.Can I control which drive letter the USB thumb drive gets assigned during the install process?If I could make it be /dev/sdc then I wouldn't be facing this problem.An alternate solution would be to know the cryptic GRUB2 commands that I can issue from the command prompt post-install, pre-reboot.But I'm wondering if that will ultimately work at all considering that GRUB2 couldn't see /dev/sdb at all.
General :: Kills A Process Internally Or From Where It Picks File To Continue Its Process?
Jan 8, 2010one tell me the internal working of kill command. that is how it kills a process internally or from where it picks file to continue its process.
View 3 Replies View RelatedGeneral :: Elevate The Priority Of A Process Without Process Superuser Rights?
Jan 21, 2011I have a high priority service that I start with sudo nice -n -10 process. This process does not need superuser rights though, except for the priority elevation. But nice requires superuser privileges to elevate priority.
View 3 Replies View RelatedGeneral :: How To Identify Raid Degrade Process / How To Rebuilt Process
Jun 12, 2010send the details raid configuration how to use in linux el5 and how to indentify the raid degrade process and how to rebuilt the process.
View 4 Replies View RelatedGeneral :: Sending Signal From Child Process To Parent Process?
Sep 8, 2010Code:
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
[code]....
Description of what the code does or what i intended to do:
1. Created a child process from parent process using 'fork()'
2. Sent a signal 'SIGALRM' from child process to parent process using 'sigqueue' function.
(The Third parameter of 'siqueue' function contains the message (message msg) which the child process wants to send to the parent process.'msg' is a stucture instance containing a) pid of child and b) string) 5. Print the 'msg' sent by child process inside the signal handler function 'sig_action_function' of the parent process I am getting some junk value when this line is executed
Code:
printf("%d
",msg->cpid);
I expected to get the pid of child process, which the child process sent to parent process through the signal.
General :: Process Scheduler A Part Of Process Queue?
Aug 12, 2010as we all know Process Scheduler does Process scheduling and its a process as well. I was just wondering that if this happens then the Process "Process Scheduler" should be a part of Process queue as well.
So if there are 5 process are there in Process queue & process scheduler is administrating them then since its also a process, once it puts a process under RUN state it should itself go inside queue because at one instant only one process can get executed on a processor. This is quite confusing for me. Please help me out. I tried to search on this but could not find any relevant topics.
General :: Find The Parent Process Of A Zombie Process?
May 4, 2010How do you find the parent process of zombie processes?
When the child process is something where the parent is not entirely obvious...
Is there some way to list processes in tree format or something?
General :: Process Shows Multiple Process Ids(pids)?
Nov 9, 2010I have a process running on Linux.When i do ps -eaf | grep <myProcess>, it show muliple entries for <myProcess> with different pids for each entry.Kindly tell me what could be the reason for a process having multiple pids?
View 1 Replies View RelatedGeneral :: Ran New Process After Sungrid Process Finished?
Mar 23, 2010I want ro ran new commandy after sungrid finish his task.Exp:qsub -q bla command1; command2 command2 start only when job of command1 finished.
View 9 Replies View RelatedGeneral :: Save The Process And Log Out Then Log In And Continue The Process?
Nov 16, 2010I've been running my shellscript for about half an hour now. It's taking longer than I thought to process all the data. I have the process ID of it. Is it possible to save the process and log out then log in and continue the process? I know how to pause a process using kill -pause pID and continue it using kill -cont pID. But that only work if you don't log out after pausing it.
View 5 Replies View RelatedUbuntu Servers :: Access Web Site When Site's Domain Name / User's Local Server's Domain Name Are Same
Feb 18, 2010In the office there is a local network with samba+openldap PDC. The local domain name is company.net. The company desided to create a corporate Website on a remote hosting and desided that the site's domain should be company.net which is same as local network's domain name. So now it is not possible to reach that corporate website from within the company's local network because, as I guess, bind9 which is installed on above menioned PDC looks for company.net on a local webserver. Is there a possibility to let people from this local network browse the remote site?
View 1 Replies View RelatedGeneral :: Killing Parent Process Without Killing Child Process (Linux C Programming)?
Mar 10, 2011I want to kill parent process after "fork()" method. but if I kill parent process with "exit(0)" method, main() thread is terminated as well so child prosess doesn't work anymore. Is there any way to kill only parent process without affecting to child process?
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
[code]....
General :: Using Wget On A Site With Cgi?
Sep 6, 2011I need to mirror a website. However, each of the links on the site's webpage is actually a 'submit' to a cgi script that shows up the resulting page. AFAIK wget should fail on this since it needs static links.
View 1 Replies View RelatedGeneral :: Ban A Certain Site To A Certain IP In Dansguardian?
Nov 25, 2010I will just ask on how will I ban a certain site to a certain IP address on the network? I am using Dansguardian Web filter.
View 1 Replies View RelatedGeneral :: How To Use 'wget' To Download Whole Web Site
Mar 14, 2011i use this code to download :wget -m -k -H URL... but if some file cant be download , it will retry Again and again ，so how to skip this file and download other files ,
View 1 Replies View RelatedGeneral :: Can't Access Site - Can't Ping
Mar 20, 2010I have a problem accessing my site.
My Gateway, is using Ubuntu.
From ssh command, I can't ping it (and can't access it).
But, when I ssh to my client's gateway (different ISP), I can ping it (and can access it).
My admin says that it's the DNS problem in my Gateway but when I change the DNS on my computer, still the problem exists.
General :: Install From A Non-repo Site Using Yum?
Oct 11, 2010its regarding yum. I know yum is used to download from repository sites. And i must configure these repo sites under /etc/yum.repos.d/. But can i install from a non-repo site using yum?
I tried installing dynagen from sourceforge.net with the following link
[root@localhost new]# yum localinstall --nogpgcheck http://sourceforge.net/projects/dyna...fc9.noarch.rpm
Loading "downloadonly" plugin
Loading "installonlyn" plugin
[Code].....
why i am not able to download from the same site using yum ? can yum only download from repo sites ?
General :: Sh File Downloading Site?
Apr 26, 2011any one know where all sh file of linux can b downlaoded...any site
View 3 Replies View RelatedFedora :: Lost Volume Control / Internet And Battery Indicator From Control Panel On F11
Jul 15, 2009I feel little silly asking this, I accidently removed from my gnome panel my internet connection, volume control and battery indicator on F11. how can I add this back. It does not show up in the add to panel menu and the applications do not give you back the default feel.
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