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Explain the significance of each field in the/etc/passwd file in Linux? 3.3. The  /etc  directory The  /etc  maintains a lot of files. Some of them are described below. For others, you should determine which program they belong to and read the manual page for that program. Many networking configuration files are in  /etc  as well, and are described in the  Networking Administrators' Guide . /etc/rc  or  /etc/rc.d  or  /etc/rc?.d Scripts or directories of scripts to run at startup or when changing the run level. See  Section 2.3.1  for further information. /etc/passwd The user database, with fields giving the username, real name, home directory, and other information about each user. The format is documented in the  passwd  manual page. /etc/shadow /etc/shadow  is an encrypted file the holds user passwords. /etc/fdprm Floppy disk parameter table. Describes what different floppy disk formats l...

Q - Explain the different ways to configure DNS & Zones? DNS is comprised  logically of Domains  but  physically of zones. A domain is a logical division of the  DNS name space  whereas a  zone  is physical, as the information is stored in a file called a  zone file . In most cases you have a 1 to 1 relationship between a Domain and a DNS Zone i.e. the domain mydomain.com would be stored in a  zone file  called mydomain.com.txt. This tutorial is for beginners and you will learn: What a DNS Zone Is What a Zone File is How DNS ones relate to Domains Different Zone Types How Zone transfer works To Explain what zones and zone files and how they work are we are going to start with a simple analogy. If you imagine that you (Bill) have organized a football league that has three teams. Teams A,B,C and each team has 20 players in the squad. What you need is for anyone to be able to contact any player on any of the tea...

Q1. How E-Commerce Portals maintain the state of Shopping Cart in case of any interruption during online shopping by the Customer? Ans: Keep your Ecommerce Shopping Cart Software Updated This is one of the most important steps when it comes to maintaining your own e-commerce website. You need to be sure to keep your shopping cart software updated to the latest version. In some cases you can easily run an update within the shopping carts web portal; but in other cases, you will have to hire help for this task, as the software will require you to download the new version. Go into the backend of the file manager, and upload the files manually to either the file system or the database. Delete Old Files You will need to make sure you do not keep old, unwanted files within your hosting account?unless they are very small. Many times large images or videos that are not used will take up a lot of space. This does not make a difference in a Cloud, VPS or Dedicated H...

 NO 1  #include<stdio.h>    #include<conio.h> void main() {  int i, j;     for(i=1;i<=5;i++)     {       for(j=1;j<=i;j++)       {        printf("%c",'A' + j-1);       }       printf("\n");     } getch(); } Output A AB ABC ABCD ABCDE no - 2 #include<stdio.h> #include<conio.h> void main() { int i, j; for(i=1;i<=5;i++) { for(j=1;j<=i;j++) { printf("%c",'A'-1 + i); } printf("\n"); } getch(); } Output A BB CCC DDDD EEEEE No - 3  #include<stdio.h> #include<conio.h> void main() { int i, j; for(i=1;i<=5;i++) { for(j=5;j>=i;j--) { printf("%c",'A'-1 + i); } printf("\n"); } getch(); } Output   AAAAA   BBBB   CCC   DD ...