(Forces a process to be killed. ) But what actually happens behind the scene?

shobhitcs

 Profile Answers by shobhitcs Questions by shobhitcs

• Jan 8th, 2008

Kill -9 forcibly kill the process without consider crashes....

gthosani1

 Profile Answers by gthosani1 Questions by gthosani1

• Dec 14th, 2007

Also pkill could be used

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inter process command in UNIX be achieved by a)pipes b)messages c)semaphores d)shared memory e)all

testra

 Profile Answers by testra Questions by testra

• Dec 11th, 2007

D)ALL

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how many simultaneous logins are allowed in Linux/Solaris for a single user ?

Amit Shiknis

 Profile Answers by Amit Shiknis Questions by Amit Shiknis

• Dec 10th, 2007

The Linux PAM (Pluggable Authentication Modules) where we can set useful limits for users or login, which can be configured in the /etc/security/limits.conf file.You can control the total limitation w...

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Amit Shiknis

 Profile Answers by Amit Shiknis Questions by Amit Shiknis

• Dec 8th, 2007

Hope this does anser your question - General System Information Tools/Utilitiesuname -a -- brief OS and kernel information. dmesg -- kernel messages given during booting. cat /var/log/messages -- is t...

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Mukesh Kumar

• Nov 20th, 2007

There are more disadvantages while putting device driver in User Application then RTOS. There will be more overhead, you have to restart the application for supporting your hardware which inturn depends on your device driver files. But in RTOS it should work fine.

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Two prompts, PS1 (Primary Prompt), PS2 (Secondary Prompt).

Linux User

• Oct 30th, 2007

Bash supports 4 prompts:PS1 - the default promptPS2 - for multi-line inputPS3 - printed for the select commandPS4 - printed before output if set -x is set(see http:// www . gnu . org/software/bash/man...

kcube

 Profile Answers by kcube Questions by kcube

• Nov 13th, 2006

PS1 Prompt used as the normal system promptPS2 Prompt used when the shell expects more inputPS3 Prompt used when you have root authority

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Crontab is a very useful command used for scheduling purpose. If a person working inn Linux operating system wishes to schedule to run later they can achieve this by using the crontab command. Thus it is possible that each user working in the Linux operating system can define their own crontab. There are many options available with this crontab command. Some of them are namely:
Crontab with...

vdeshpande

 Profile Answers by vdeshpande Questions by vdeshpande

• Oct 29th, 2007

Crontab will keep ur jobs ongoing even when u are away crontab *****  each star has its own meanin  hors days month year  dayof the month plz check more on this topic @linux userforums

Bhagavan Reddy

• Apr 19th, 2007

Hi,Please explain clealy crontab command.And i want to run one shell script every 3 hours, and it should start 1 A.M and end should be 10 P.M.How to use crontab command for above requirement...RegardsBhagavan Reddy.

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Ans:  manA filter is a program which can receive a flow of  data from std input, process (or filter) it and send the result to the std output.

Sravanthi

• Oct 17th, 2007

Man and cat

syed

• May 7th, 2007

Pg

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Before answering this question it is important one should know about ls command in detail in UNIX or LINUX operating system. ls command without any option is used to list files and this command list files generally in alphabetical order. That is the command list the files present in a directory with one file per line displayed on the screen. Simply using s command without any option display all files...

djapplegate

 Profile Answers by djapplegate Questions by djapplegate

• Oct 12th, 2007

For a quick listing of Directories I use ls -d */.This lists all the dirs at the current file system level.  It doesn`t follow the leaf nodes down the dir structure. 

vnanda

• Jun 22nd, 2007

Find . -type d It would list the names of all the directories in current directory recursively.ThanksVikram Nanda

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zing

• Oct 10th, 2007

To ad to that ....UNIX is also used by about 30% of the population using computers.  Remember not everyone likes windows or microsoft.expand your scope as you will cover the majority

Nainesh

• Jul 21st, 2007

Unix is a barebon O.S. which can be used for software testing process because its kernel is most powerfull and secure!

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lovely sethi

• Aug 25th, 2007

It is a process by which?user work will proceed at the proper time, whether user is there or not.

suhasiniballa

• Nov 18th, 2005

Scheduling

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Sridhar

• Aug 24th, 2007

On Solaris CDE env, it simply takes your login id and pwd and comes out without throwing any error message.If you are on the console trying to telnet/ssh/rsh/ftp it will allow you to login.

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Pruthvi

• Jul 12th, 2007

Hi Yes, What you said is some what correct. But it does?not fill what it supposed to. I mean operating system security is the preventic usage of hardware and software of system from viruses and invalid users.

safar

• May 13th, 2007

Operating system security means in simple to secure your data from external attack, either from intruder or any damage.RegardsSafar

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mohit

• May 30th, 2007

In the  : dedicated mode

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Use ‘su’ command. The system asks for password and when valid entry is made the user gains super user (admin) privileges.

bkoh

• May 21st, 2007

"su" is the command to switch to a super user status (commonly known as root user) from a user shell.This command does not load the shell settings for a typical super user that login fr...

sania

• Mar 7th, 2007

Well, su - is the command that is used to switch to a super user.After that it will ask for password of root.then you are super user.

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raj

• May 17th, 2007

Deadlock:Two processes are said to be in deadlock situation if process A holding onto resources required for process B and where as B holding onto the resources required for process A.Starvation:This ...

peter

• Jan 14th, 2006

A { wait_for(lock_1) {  do something that takes time  wait_for(lock_2) {   do something  } }}B { wait_for(lock_2) {  do somet...

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penchal

• Apr 18th, 2007

When we run a script, it will be executed in a child shell. Changes in the child shell will not be reflected in the parent shell.For reflecting those changes, we use dot(.) command.For Example ..In a ...

vtian

• Apr 18th, 2007

./myExeSh run the script in another shell.. /myExeSh executing in  the current shell. All variable in the shell script will leave in the current shell after execution finished../myExeSh = sh myEx...

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Gaurav

• Apr 17th, 2007

The tar command archives and extracts files to  and  from  a  single  file  called  a tarfile. tar -cvf <abc.tar> /abc/*This command would bundle all the coint...

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Please give examples of both Daemon and Server processes. Thanks.

Sonia Chugh

• Apr 15th, 2007

A daemon is a software process that runs in the background (continuously) and provides the service to client upon request. For example named is a daemon. When requested it will provide DNS servi...

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Before going into the storage of semaphore it is first vital to know about semaphores. A semaphore is nothing but a term used in UNIX for a variable which acts as a counter. So the next question that comes in mind is what for we need this variable. It’s so simple. The reason is explained below. For instance there may be times when two processes try to access the same file simultaneously. In...

riteshvado

 Profile Answers by riteshvado Questions by riteshvado

• Apr 11th, 2007

On linux machines you can view semaphore using command :-ipcs -sYou can delete semaphores using ipcrm command.

brajesh

• Sep 27th, 2006

Semaphore stored inside the kernel

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