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LINUX Patch / Package
How to apply Patch / Package for LINUX?
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Server Down in LINUX
In LINUX OS if Server goes down, What will you do to restore it back?
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What is the use of the command "ls -x chapter[1-5]"?
Ls stands for list; so it displays the list of the files that starts with 'chapter' with suffix '1' to '5', chapter1, chapter2, and so on.
MJ
- May 8th, 2006
Yes you are correct. It stands for listing the files Chapter with suffix 1 to 5 but it will display the files in columns as with-x option.
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Is it possible to restrict incoming message?
Yes, using the ‘mesg’ command.
wow_suraj
- May 7th, 2008
messages can be restricted by you with the help of 'mesg n', this will restrict the incoming of messages to your terminal, for again allowing messages for your terminal you can use 'mesg y'.
ashok kumar
- Feb 21st, 2006
Yes its by using mesgbut the command is mesg n(to restrict incomming messge)mesg y(to allow messge)
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What is the difference between cat and more command?
Cat displays file contents. If the file is large the contents scroll off the screen before we view it. So command 'more' is like a pager which displays the contents page by page.
kcube
- Nov 13th, 2006
The cut command cuts bytes, characters, or fields from each line of a file and writes these bytes, characters, or fields to standard output. If you do not specify the File parameter, the cut command r...
myquery
- Apr 1st, 2006
In Unix, cat command is used to display the contents on to the screen$cat filenamemore command is used to diaplay a file with pausing.$more filename
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How is the command “$cat file2 “ different from “$cat >file2
Both the commands mean the same , the file file1 is read and its contents are copied to file2
kcube
- Nov 13th, 2006
$cat file2 --- Shows the contents of the file file2$cat >file2 --- Since there is no input file specified, it takes the standard input and copies it to a new file named file2. If the file2 is already existing, it will over write the file.
jagannathreddy
- Feb 24th, 2006
The Commond $cat file in unix is used to display the content of the file and where as commond $cat >> file is to append the text to the end of the file without overwritting the information...
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Explain the following commands?
$ ls > file1$ banner hi-fi > message$ cat par.3 par.4 par.5 >> report$ cat file1>file1$ date ; who$ date ; who > logfile$ (date ; who) > logfile
Chintz
- Sep 27th, 2006
$ ls > file1=====>Redirects the output of ls command to file1$ banner hi-fi > message=====>Redirects the output of banner command to message$ cat par.3 par.4 par.5 >> report=====>...
Aparna
- Jul 18th, 2006
$ ls > file1writes the list of all the files in the folder into a file called file1$ banner hi-fi > messagegives an error coz of the - i guess$ cat par.3 par.4 par.5 >> reportwrites t...
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What are your solution strategies for "Dining Philosophers Problem”?
suraj
- Oct 17th, 2005
P: philoshoferf1: forksOne solution is to order the forks and require the philosophers to pick the forks up in increasing order. In this solution the philosophers are labeled P1, P2, P3, P4, and P5 an...
suraj
- Oct 17th, 2005
/* here is a c code may help u by suraj */#include <stdio.h>#include <stdlib.h>#include <unistd.h>#include <semaphore.h>#include <pthread.h>#include "msecond....
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What is Process Control board in UNIX?
parthvora18
- Aug 20th, 2008
Process Control Block in Unix is a data structure which is used to mange Processes. It contains following:1. PID2. Pointer to the next PCB3. Register Values4. Priority5. I/O information6. Process accounting information. 7. Adress Space.
Rakesh
- Sep 13th, 2006
I heared about the Process control block. Which will store the Pids od the processes in the system. But Process control board?? Is some thing like that exists??? Not sure!!!
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What does the following command do?cp $ABC/$SUP/xyz.tct .;?
Markerhell
- Aug 28th, 2009
This will copy the file xyz.tct from root directory ( / ) to present working directory.
Rashmi
- Jul 9th, 2006
This command will copy the file abc.txt (picked up from the location $ABC/$SUP/) to the current directory u are working on. The file created on the currect directory will also be of the same name abc.txt
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Where is the semaphore stored in UNIX operating system?
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
- 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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Name the system calls used for process management?
Divya
- Oct 23rd, 2006
System Calls for process control * fork() * wait() * execl(), execlp(), execv(), execvp() * exit() * signal(sig, handler) * kill(sig, pid)
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Masked Code
What is the number of masked code ee@?
Bharath Yadlapalli
- May 2nd, 2012
When kill -3 command is executed, it will quit from executing the process and additionally it will dump core for that process mentioned with pid.
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The Cost of storing a bit is minimum in 1. Cache 2. Register 3. RAM 4. Magnetic tape
raj
- May 17th, 2007
Obviously it will be in 'Magnetic tapes' as it can be unlimited and cheaper.
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Write a command to display a file’s contents in various formats?
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Which of the following commands is not a filter?(a)man , (b) cat , (c) pg , (d) head?
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.
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Difference between kill and kill -9
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.
UNIX Interview Questions
Ans