My Solutions

VMware Tools Installation in RHEL 6

noreply@blogger.com (MY SOLUTIONS) — Thu, 10 Dec 2015 04:54:00 +0000

VMware tools installation in RHEL 6

VMware Tools Installation Video :-

VMware Tools Installation Steps :-

Step 1:- First of all you need to login to RHEL 6 machine with root user (Super User).
              If you did not login with root user account, then execute the following command to switch your account
              to root.

              #su -

Step 2:- Then insert the VMware Tools CD Image and mount it to your RHEL 6 Machine.

              To insert the VMware Tools CD Image, click on VM -> Install VMware Tools.

              To mount it to your system, execute the following command:-

              #mount /dev/cdrom /mnt

Step 3:- In the next step you need to copy the ‘VMwareTools-5.0.0-xxxx.tar.gz’ from ‘/mnt/’ to ‘/tmp/’.

              To copy the ‘VMwareTools-5.0.0-xxxx.tar.gz’ from ‘/mnt/’ to ‘/tmp/' execute the following commands:-

              #cd /mnt

              #cp VMwareTools-5.0.0-xxxx.tar.gz /tmp

Note: - Where xxxx is the build/revision number of the VMware Workstation release.

Step 4:- Now untar or extract the VMware Tools tar file, by executing the following commands.

#cd /tmp

#tar –xvf VMwareTools-5.0.0-xxxx.tar.gz

Step 5:- Then go to ‘vmware-tools-distrib’and run .tar VMware Tools installer.

              To run .tar VMware Tools installer, execute the following command:-

              #cd vmware-tools-distrib

              #./vmware-install.pl

              Respond to the configuration questions on the screen. Press Enter to accept the default value.

Step 6:- Log off the root user account and reboot the RHEL 6 Machine.

               To log off the root user account, execute the following command:-

              #exit

               To reboot the RHEL 6 Machine, execute the following command:-

              #reboot

Step 7:- Then check the service status.

Click on System -> Administration -> Services

Then find out the service named ‘vmware-tools’.

Sort Command in Linux With Examples

noreply@blogger.com (MY SOLUTIONS) — Tue, 01 Dec 2015 02:48:00 +0000

Sort Command in Linux with Examples

Grep Command in Linux with Examples

noreply@blogger.com (MY SOLUTIONS) — Tue, 01 Dec 2015 02:47:00 +0000

Grep Command in Linux with Examples

Autofs Configuration in RHEL 6

noreply@blogger.com (MY SOLUTIONS) — Tue, 22 Sep 2015 08:04:00 +0000

Autofs Configuration in RHEL 6

What is Autofs?

One drawback to using /etc/fstab is that, regardless of how infrequently a user accesses the NFS mounted file system, the system must dedicate resources to keep the mounted file system in place. This is not a problem with one or two mounts, but when the system is maintaining mounts to many systems at one time, overall system performance can be affected. An alternative to /etc/fstab is to use the kernel-based automount utility. An automounter consists of two components:

a kernel module that implements a file system, and
a user-space daemon that performs all of the other functions.

The automount utility can mount and unmount NFS file systems automatically (on-demand mounting), therefore saving system resources. It can be used to mount other file systems including AFS, SMBFS, CIFS, and local file systems.

Benefits of Autofs :-

Mounts occur automatically and transparently when a user tries to access any files or directories under the designated mount point of the remote file system to be mounted.
Mounts are removed automatically when the contents of the mounted file system have not been used for a specified period of time.
Users have transparent mount access; the mounts are automatically triggered when the user uses a command like cd to access files or directories that are actually on a remote file system. (In both conventional and automount methods, all user mounts must be preconfigured by the system administrator).
New links cannot be manually added and made active without rebooting automount.
One or more NFS servers may be designated as the source of a filesystem. This redundancy means that if one server is unavailable, the mount may be obtained from another.
Service primarily provided by the automount (NADM) command.
Files used are a variety of maps for configuring automatic mounts; /etc/mnttab for a listing of all the currently mounted file systems.

Autofs Daemon :-

autofs :- This daemon is used to performs all of the functions of Autofs

Important Files of Autofs :-

/etc/auto.master:- It’s a main configuration file of autofs. It contains the mount point and their mappings.
/etc/sysconfig/autofs:- Default startup directories.

Autofs Configuration LAB :-

Aufofs Practical Video :-

Autofs step by step configuration :-

Step 1:- Configure the NIC (Network Interface Card).
Execute the following command to configure NIC.

#setup

Step 2:- Restart the Network Service by executing the following command.

#service network restart

Step 3:- Then check your NIC Configuration with the help of following command.

# Ifconfig

Step 4:- In the next step we need to install autofs packages on our RHEL 6 machines. We can
              install it via “yum” (Red Hat Linux) and “apt-get” (Debian and Ubuntu) package installers.

              To install autofs packages using “yum” in RHEL 6 execute following command it: -

              # yum install autofs

              To install autofs packages using “apt-get” in Debian or Ubuntu execute following command it: -

              #apt-get install autofs

Step 5:- In this step you have to verify that autofs packages are installed.

To verify the “autofs” package execute the following command:-

#rpm –qa autofs

Step 6:- In the next step, create a new auto mount directory to mount the share on the Remote Host
              and named it whatever you want, you can also use an already existing directory with Autofs.

              To create a new directory executes the following command:-

              #mkdir /myshare

Step 7:- Execute the following command to display the share list of NFS Server.

              #showmount –e <server-ip-address >

              In our example, the server ip address is - 172.18.209.9.

              So the command will be looks like this:-

              #showmount –e 172.18.209.9

Step 8:- In the next step edit ‘/etc/auto.master’ file and add the map entry to it.

              The Syntax of map entry is shown below:-

              Mount_point   Map_name   Options

              Example:-

              /myshare    /etc/auto.myshare    --timeout=20

Step 9:- Now copy the map file “/etc/auto.misc” as “/etc/auto.myshare” else create it.

              To copy the map file “/etc/auto.misc” as “/etc/auto.myshare” use the following command:-

              #cp /etc/auto.misc /etc/auto.myshare

              Or to create a new map file, execute the following command:-

              #vim /etc/auto.myshare

Step 10:- In the next step add a mount point entry (also called map entry) to map file, which you have
              created in the previous step.

              The Syntax of map entry is shown below:-

              Mount_point    [options]    Location

              Example:-

              share1    -fstype=nfs    172.18.209.9:/nfsshare1

Step 11:- In the last step execute the following command to start, restart or reload the autofs daemon.

              To start the autofs daemon, execute the following command:-

              #service autofs start

              To restart the autofs daemon, execute the following command:-

              #service autofs restart

              To check the status of autofs daemon, execute the following command:-

              #service autofs status

              To reload the autofs daemon, execute the following command:-

              #service autofs reload

Virtual Box Guest Additions Tools Installation in RHEL 7

noreply@blogger.com (MY SOLUTIONS) — Tue, 08 Sep 2015 11:13:00 +0000

Virtual Box Guest Addition Tools Installation in RHEL 7

Virtual Guest Addition Tools Installation Video :-

Practical Steps :-

Step 1:- first of all insert the RHEL 7 DVD into your PC and mount it.
To mount it, use the following command: -

# mount /dev/cdrom /mnt

Step 2:- In the next step create the configuration file of Local YUM Server in “/etc/yum.repos.d/”
              directory and add the following line in it.

              [Server]
              name=Local Yum Server
              baseurl=file:///mnt/
              enabled=1
              gpgcheck=0

              To create configuration file use the following command:-

              #vim /etc/yum.repos.d/server.repo

Step 3:- In the next step execute the following command to install the ‘Development Tools’.

              #yum groupinstall ‘Development Tools’

              As well as we will need kernel development package:

              #yum install kernel-devel

Step 4:- After the installation navigate to Virtual Box menu:

Virtual box menu -> Devices -> Insert Guest Additions CD image

This will pop-up a menu and when the pop-up menu appear, click on ‘RUN’.

Step 5:- In the last step reboot your PC by executing the following command :-

#reboot

C Program - Insert an element in an array

noreply@blogger.com (MY SOLUTIONS) — Sat, 08 Aug 2015 03:04:00 +0000

C Program Insert an element in an array

#include<stdio.h>
#include<conio.h>
#define max_size 100
void main()
{
int arr[max_size];
int i,n,element,location;
clrscr();
printf("Enter the number of element :- ");
scanf("%d",&n);
printf("\nEnter the elements of array :- \n");
for(i=0;i<n;i++)
{
scanf("%d",&arr[i]);
}
printf("\nEnter the element :- ");
scanf("%d",&element);
printf("\nEnter the location :- ");
scanf("%d",&location);
for(i=n;i>=location;i--)
{
arr[i]=arr[i-1];
}
n++;
arr[location-1]=element;
printf("\nDisplay array element :- \n");
for(i=0;i<n;i++)
{
printf("%d\n",arr[i]);
}
getch();
}

Output :-

Back to 'C Language Programs'

C Program - To Read Array Element

noreply@blogger.com (MY SOLUTIONS) — Sat, 08 Aug 2015 02:59:00 +0000

C program to read array element

#include<stdio.h>
#include<conio.h>
#define max_size 100
void main()
{
int arr[max_size];
int i,n;
clrscr();
printf("\nEnter the number of elment of an array :- ");
scanf("%d",&n);
printf("\nEnter the element of an array :- \n");
for(i=0;i<n;i++)
{
scanf("%d",&arr[i]);
}
printf("\nDisplay array element :- \n");
for(i=0;i<n;i++)
{
printf("Value of arr[%d] :- %d \n",i,arr[i]);
}
getch();
}

Output :-

Back to 'C Language Programs'

Display Array Elements with Address

noreply@blogger.com (MY SOLUTIONS) — Sat, 08 Aug 2015 02:52:00 +0000

Display Array Elements with Address

#include<stdio.h>
#include<conio.h>
void main()
{
int arr[5]= {10,20,30,40,50};
int i;
clrscr();
printf("\n");
for(i=0;i<5;i++)
{
printf("a[%d] :- Value :- %d and Address :- %u \n",i,arr[i],&arr[i]);
}
getch();

}

Output :-

Back to C Language Programs

C Program - To check the 'Armstrong Number'

noreply@blogger.com (MY SOLUTIONS) — Sat, 25 Jul 2015 04:20:00 +0000

C Program to check the 'Armstrong Number'

#include<stdio.h>
#include<conio.h>
void main()
{
int rem,temp,n,arm=0;
clrscr();
printf("\nEnter any number :- ");
scanf("%d",&n);
temp=n;
while(temp!=0)
{
rem=temp%10;
arm=arm+rem*rem*rem;
temp=temp/10;
}
if(n==arm)
{
printf("\nThe given number is armstrong number");
}
else
{
printf("\nThe given number is non-armstrong number");
}
getch();
}

Output :-

Back to 'C Language Programs'

C Program - To check the 'Pallindrome Number' between a given range

noreply@blogger.com (MY SOLUTIONS) — Sat, 25 Jul 2015 04:17:00 +0000

C Program to check the 'Pallindrome Number' between a given range

#include<stdio.h>
#include<conio.h>
void main()
{
int rem,temp,i,n,m,rev=0,count=0;
clrscr();
printf("\nEnter the startig number :- ");
scanf("%d",&n);
printf("\nEnter the ending number :- ");
scanf("%d",&m);
printf("\nPallindrome numbers between a given range are :- \n");
for(i=n;i<m;i++)
{
temp=i;
while(temp!=0)
{
rem=temp%10;
rev=rev*10+rem;
temp=temp/10;
}
if(i==rev)
{
printf(" %d",i);
count++;
}
rev=0;
}
printf("\n\nTotal number of pallindrome between a given range is :- %d",count);
getch();
}

Output:-

Back to 'C Language Programs'

C Program - To check the Pallindrome Number

noreply@blogger.com (MY SOLUTIONS) — Sat, 25 Jul 2015 04:13:00 +0000

C Program to check the 'Pallindrome Number'

#include<stdio.h>
#include<conio.h>
void main()
{
int rem,temp,n,rev=0;
clrscr();
printf("\nEnter any number :- ");
scanf("%d",&n);
temp=n;
while(temp!=0)
{
rem=temp%10;
rev=rev*10+rem;
temp=temp/10;
}
if(n==rev)
{
printf("\nThe given number is pallindrome number");
}
else
{
printf("\nThe given number is non-pallindrome number");
}
getch();
}

Output:-

Back to 'C Language Programs'

C Program - To sum of digits of given number

noreply@blogger.com (MY SOLUTIONS) — Sat, 25 Jul 2015 04:06:00 +0000

C Program to sum of digits of given number

#include<stdio.h>
#include<conio.h>
void main()
{
int rem,temp,n,sum=0;
clrscr();
printf("\nEnter any number :- ");
scanf("%d",&n);
temp=n;
while(temp!=0)
{
rem=temp%10;
sum=sum+rem;
temp=temp/10;
}
printf("\nThe Reverse number is :- %d",sum);
getch();
}

Output:-

Back to 'C Language Programs'

C Program - To print the reverse number

noreply@blogger.com (MY SOLUTIONS) — Sat, 25 Jul 2015 04:04:00 +0000

C program to print the reverse number

#include<stdio.h>
#include<conio.h>
void main()
{
int rem,rev=0,temp,n;
clrscr();
printf("\nEnter any number :- ");
scanf("%d",&n);
temp=n;
while(temp!=0)
{
rem=temp%10;
rev=rev*10+rem;
temp=temp/10;
}
printf("\nThe Reverse number is :- %d",rev);
getch();
}

Output :-

Back to 'C Language Programs'

C Program - To check the prime numbers between a given range

noreply@blogger.com (MY SOLUTIONS) — Sat, 25 Jul 2015 03:23:00 +0000

C Program to check the prime numbers between a given range

#include<stdio.h>
#include<conio.h>
void main()
{
int i,j,c,b=0,n,m,count=0;
clrscr();
printf("\nEnter the starting number :- ");
scanf("%d",&n);
printf("\nEnter the ending number :- ");
scanf("%d",&m);
printf("\nPrime numbers between the given range are :- \n");
for(i=n;i<m;i++)
{
c=i;
for(j=2;j<c;j++)
{
if(c%j==0)
{
b=1;
break;
}
}
if(b==0)
{
printf(" %d",c);
count++;
}
b=0;
}
printf("\n\nTotal number of prime number is :- %d",count);
getch();
}

Output :-

Back to 'C Language Programs'

C Program - To check the prime number

noreply@blogger.com (MY SOLUTIONS) — Sat, 25 Jul 2015 02:56:00 +0000

C program to check the prime number

#include<stdio.h>
#include<conio.h>
void main()
{
int i,n,b=0;
clrscr();
printf("\nEnter any number :- ");
scanf("%d",&n);
for(i=2;i<n;i++)
{
if(n%i==0)
{
b=1;
break;
}
}
if(b==0)
{
printf("\nThe given number is a prime number ");
}
else
{
printf("\nThe given number is non-prime number ");
}
getch();
}

Output :-

Back to 'C Language Programs'

C Program - For Loop 13

noreply@blogger.com (MY SOLUTIONS) — Sat, 25 Jul 2015 02:43:00 +0000

C Program - For Loop 13

#include<stdio.h>
#include<conio.h>
void main()
{
int i,j,k,n;
clrscr();
printf("\nEnter the number of rows :- ");
scanf("%d",&n);
for(i=0;i<n;i++)
{
for(k=0;k<=i;k++)
{
printf(" ");
}
for(j=1;j<=2*(n-i)-1;j++)
{
printf(" *");
}
printf("\n");
}
for(i=1;i<n;i++)
{
for(k=n;k>i;k--)
{
printf(" ");
}
for(j=1;j<=2*i+1;j++)
{
printf(" *");
}
printf("\n");
}
getch();
}

Output :-

Back to 'C Language Programs'

C Program - For Loop 12

noreply@blogger.com (MY SOLUTIONS) — Fri, 24 Jul 2015 11:21:00 +0000

C Program - For Loop 12

#include<stdio.h>
#include<conio.h>
void main()
{
int i,j,k,n;
clrscr();
printf("\nEnter the number of rows :- ");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
for(j=1;j<=i;j++)
{
printf(" *");
}
for(k=1;k<=2*(n-i)-1;k++)
{
printf(" ");
}
if(i==n)
{
for(j=1;j<i;j++)
{
printf(" *");
}
}
else
{
for(j=1;j<=i;j++)
{
printf(" *");
}
}
printf("\n");
}
n=n-1;
for(i=0;i<n;i++)
{
for(j=n;j>i;j--)
{
printf(" *");
}
for(k=1;k<=2*i+1;k++)
{
printf(" ");
}
for(j=n;j>i;j--)
{
printf(" *");
}
printf("\n");
}
getch();
}

Output:-

Enter the number of rows :- 5

Back to 'C Language Programs'

C Program - For Loop 11

noreply@blogger.com (MY SOLUTIONS) — Fri, 24 Jul 2015 10:40:00 +0000

C Program - For Loop 11

#include<stdio.h>
#include<conio.h>
void main()
{
int i,j,n,k=1,c;
clrscr();
printf("\nEnter the number of rows :- ");
scanf("%d",&n);
for(i=0;i<=n;i++)
{
for(c=n;c>i;c--)
{
printf(" ");
}
for(j=1;j<=2*i+1;j++)
{
if(j<i+1)
{
printf(" %d",k);
k++;
}
else
{
printf(" %d",k);
k--;
}
}
k=1;
printf("\n");
}
getch();
}

Output :-

Enter the number of rows :- 5

1
1 2 1
1 2 3 2 1
1 2 3 4 3 2 1
1 2 3 4 5 4 3 2 1

Back to 'C Language Programs'

C Program - For Loop 10

noreply@blogger.com (MY SOLUTIONS) — Fri, 24 Jul 2015 09:59:00 +0000

C Program - For Loop 10

#include<stdio.h>

#include<conio.h>

void main()

{

int i,n,j,k;

clrscr();

printf("\nEnter the number of rows :- ");

scanf("%d",&n);

for(i=0;i<n;i++)

{

for(k=n-1;k>i;k--)

{

printf(" ");

}

for(j=1;j<=2*i+1;j++)

{

printf(" *");

}

printf("\n");

}

for(i=1;i<n;i++)

{

for(k=1;k<=i;k++)

{

printf(" ");

}

for(j=1;j<=2*(n-i)-1;j++)

{

printf(" *");

}

printf("\n");

}

getch();

}

Output :-

Enter the number of rows ;-

Back to 'C Language Programs'

C Program - For Loop 9 (Factorial Number)

noreply@blogger.com (MY SOLUTIONS) — Fri, 24 Jul 2015 09:49:00 +0000

C Program - For Loop 9 (Factorial Number)

#include<stdio.h>
#include<conio.h>
void main()
{
int i,n,fact=1;
clrscr();
printf("\nEnter the value :- ");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
fact=fact*i;
}
printf("\nThe factorial value of %d :- %d ",n,fact);
getch();
}

Output :-

Enter the value :- 5

The factorial value of 5 :- 120

Back to 'C Language Programs'

C Program - For Loop 8

noreply@blogger.com (MY SOLUTIONS) — Fri, 24 Jul 2015 09:44:00 +0000

C Program - For Loop 8

#include<stdio.h>
#include<conio.h>
void main()
{
int i,j,n,k=2;
clrscr();
printf("\nEnter the number of rows :- ");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
for(j=1;j<=i;j++)
{
if(k%2==0)
{
printf(" 0");
}
else
{
printf(" 1");
}
k++;
}
printf("\n");
}
getch();
}

Output :-

Enter the number of rows :- 5

0
1 0
1 0 1
0 1 0 1
0 1 0 1 0

Back to 'C Language Program'

C Program - For Loop 7

noreply@blogger.com (MY SOLUTIONS) — Fri, 24 Jul 2015 04:46:00 +0000

C Program - For Loop 7

#include<stdio.h>
#include<conio.h>
void main()
{
int i,j,n,k=2;
clrscr();
printf("\nEnter the number of rows :- ");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
for(j=1;j<=i;j++)
{
printf(" %2d",k);
k++;
}
printf("\n");
}
getch();
}

Output :-

Enter the number of rows :- 5

2
3 4
5 6 7
8 9 10 11
12 13 14 15 16

Back to 'C Language Programs'

C Program - For Loop 6

noreply@blogger.com (MY SOLUTIONS) — Fri, 24 Jul 2015 04:37:00 +0000

C Program - For Loop 6

#include<stdio.h>
#include<conio.h>
void main()
{
int i,j,n;
clrscr();
printf("\nEnter the number of rows :- ");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
for(j=1;j<=i;j++)
{
if(j%2==0)
{
printf(" 0");
}
else
{
printf(" 1");
}
}
printf("\n");
}
getch();
}

Output :-

1
1 0
1 0 1
1 0 1 0
1 0 1 0 1

Back to 'C Language Programs'

C Program - For Loop 5

noreply@blogger.com (MY SOLUTIONS) — Fri, 24 Jul 2015 04:14:00 +0000

C Program - For Loop 5

#include<stdio.h>
#include<conio.h>
void main()
{
int i,j,n;
clrscr();
printf("\nEnter the number of rows :- ");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
for(j=1;j<=i;j++)
{
if(i%2==0)
{
printf(" 0");
}
else
{
printf(" 1");
}
}
printf("\n");
}
getch();
}

Output :-

Enter the number of rows :- 5

1
0 0
1 1 1
0 0 0 0
1 1 1 1 1

Back to 'C Language Programs'

C Program - For Loop 4

noreply@blogger.com (MY SOLUTIONS) — Fri, 24 Jul 2015 04:03:00 +0000

C Program - For Loop 4

#include<stdio.h>
#include<conio.h>
void main()
{
int i,j,n;
clrscr();
printf("\nEnter the number of rows :- ");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
for(j=1;j<=i;j++)
{
printf(" %d",i);
}
printf("\n");
}
getch();
}

Output :-

Enter the number of rows :- 5

1
2 2
3 3 3
4 4 4 4
5 5 5 5 5

Back to 'C Language Programs'