venus.bbsr09

 Profile Answers by venus.bbsr09 Questions by venus.bbsr09

• Mar 19th, 2011

Command is vi /etc/grub/grubconfig

kumar3786

 Profile Answers by kumar3786 Questions by kumar3786

• Jul 17th, 2008

Boot frm 1st cd type1) chroot /mnt/sysimage2) grub-install /dev/sda

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How will you assign superuser privilege to an ordinary user temporarily?

abdas

 Profile Answers by abdas Questions by abdas

• Jul 31st, 2011

Command su to be used for Acquiring superuser status
Suppose you are already logged in with a username juliet, you can get the superuser status like below.
$ su
Password: ******** -> roots password. But this is not temporary.

thumbeti

 Profile Answers by thumbeti Questions by thumbeti

• Mar 22nd, 2011

There are 2 to do this.1) Edit /etc/passwd file by chaning the UID of the required user to "0"     This makes normal user as superuser2) Using "sudo", ordinary user can execute any command with superuser privileges.

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What is the command to fetch first 10 records in a file?

sunil

• Jul 27th, 2011

Command as follows
HEAD -10 filename

and for lower records

TAIL -10 filename

srnayak17

 Profile Answers by srnayak17 Questions by srnayak17

• May 20th, 2010

It would be always safe to use 'sed command'sed -n '1-10p' filename > outputfile

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Assume that you are NOT currently in your home directory. Enter a command to copy all files in your home directory beginning with the letter 'a' to the current directory.

sirisha

• Apr 30th, 2012

Cp [a]* /export/home/

Tdolby

 Profile Answers by Tdolby Questions by Tdolby

• Dec 12th, 2010

Cp ~/a* .

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By using which command can you find the CPU utilization time?

abdas

 Profile Answers by abdas Questions by abdas

• Jul 31st, 2011

$ iostat
tty 2/md300 2/md301 2/md302 2/md303 cpu
tin tout kps tps serv kps tps serv kps tps serv kps tps serv us sy wt id
0 4819 0 0 4 292 15 3 1 0 3 0 0 4 67 10 0 22

nelgin

 Profile Answers by nelgin Questions by nelgin

• Apr 6th, 2011

Top shows you current, if you want historical information, and it's configured, you can use sar.

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sumit_87kumar

 Profile Answers by sumit_87kumar Questions by sumit_87kumar

• Jul 16th, 2008

Magnetic tape

raj

• May 17th, 2007

Obviously it will be in 'Magnetic tapes' as it can be unlimited and cheaper.

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$od -cbd file_namec - character, b - binary (octal), d-decimal, od=Octal Dump.

shobhitcs

 Profile Answers by shobhitcs Questions by shobhitcs

• Jan 14th, 2008

To change the output in binery format the command is :%!xxd -b

shobhitcs

 Profile Answers by shobhitcs Questions by shobhitcs

• Jan 14th, 2008

To change in hexadecimal command :%!xxd in vim editor...and for return to character :%!xxd -r

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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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viva.srivas

 Profile Answers by viva.srivas Questions by viva.srivas

• Apr 15th, 2008

Kill      ---> generates SIGTERM signal requesting process to terminatekill -9 ---> generates SIGKILL signal for process to terminate immediately

Lakshmi Gunturi

• Mar 29th, 2007

Kill -9 is force termination of a job means processes which refuse to die.

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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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siva2sk

 Profile Answers by siva2sk Questions by siva2sk

• Feb 24th, 2007

oh, i forgot to answer the part about function./system. calls- function call is generally within the same protection space (ie. user mode to user mode or kernel mode to kernel mode).- system call is w...

siva2sk

 Profile Answers by siva2sk Questions by siva2sk

• Feb 24th, 2007

you should refer to a man page. both create a child process.fork - parent and child are in 'running' status. they share all page tables until one of them does a write, then on-demand paging wi...

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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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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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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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sumit01_77

 Profile Answers by sumit01_77 Questions by sumit01_77

• Jan 25th, 2006

In simple terms a Semaphore is a unit or resource which is used for synchrosation between two processes , it is kind of flag (in abstract terms) which every process will check before processing ahead to avoid the deadlock situationAshish

praveenlaxmipalem

 Profile Answers by praveenlaxmipalem Questions by praveenlaxmipalem

• Nov 25th, 2005

A semaphore is a type of Interprocess communication resource used for synchronization and mutual exclusion between any two asynchronous processes.

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chandu

• Jan 27th, 2006

The process of packing one or more items of data into a message buffer, prior to transmitting that message buffer over a communication channel. The packing process not only collects together values wh...

shan

• Dec 7th, 2005

In a distributed environment, client sends its request as a bundle. its like adding header to the data. This process of bundling data is called marshelling.

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dave

• Feb 11th, 2007

The root user would be allowed to ftp to the server. The /etc/ftpd/ftpusers file lists users that are disallowed from using ftp.

Nagajothi

• Feb 6th, 2007

The 'root' cannot access the remote system using FTP connection.

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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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katz04

 Profile Answers by katz04 Questions by katz04

• May 18th, 2008

The Linux OS is not virus free. It is as susceptible to viruses as other operating systems. While the relative numbers of Linux viruses is small, the number of viruses written for Linux is growing as Linux comes into widespread use.

Chulbuli

 Profile Answers by Chulbuli Questions by Chulbuli

• Dec 21st, 2007

In Linus, the kernal is protected by the core and the application programes. Eve if there is any virus coming in linux has built in antivirus  application which which detect the virus and  protect the system from it.

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akki1af1

 Profile Answers by akki1af1 Questions by akki1af1

• May 21st, 2009

Every process has a private u area, yet the kernel acesses it as if there were only one u area in the system, that of the running process. The kernel changes its virtual address translation map accord...

gthosani1

 Profile Answers by gthosani1 Questions by gthosani1

• Dec 19th, 2007

The u area. In addition to the text, data, and stack segment, the OS also maintains for each process a region called the u area (User Area). The u area contains information specific to the process (e...

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