UNIX environment check

1. How to check the shell you are running?

ps utility can show the current shell you are working with.

>ps

PID TTY          TIME CMD
2549 pts/0    00:00:00 bash
2598 pts/0    00:00:00 ps

2. How to change to superuser / root privilege in unix?

>sudo su -

This command will ask for passoword and once it is give the prompt will also chnage to "#" . Be careful the with root privilege you can modify systems files.

3. How to change password in unix?

Give the command passwd .It will ask for the current password and the new password.

>passwd
Changing password for user.
(current) UNIX password:
Enter new UNIX password:

4. How the check the environment you are working on ?

>hostname

This will display the environment on shell.

5. To display which all users have logged in .

>who
user :0           2015-04-25 16:35 (:0)user pts/0        2015-04-25 16:40 (:0)user pts/16       2015-04-25 17:20 (:0)

The first cloumn is showing the name of user. The second column is showing the device to wich each user's terminal emulator is connected to. The third column is the date and time each user has logged in.

6. To display which terminal I am using and login time.

>who am i
user pts/16       2015-04-25 17:20 (:0)

Comments

C programing : File

/* Program to take lines 1,4,7,10.... from a text file and to write into a new file. It is written in c with platform devcpp*/ /* eg:- input file -> ab.txt contain 1 lady gaga sdrgrg ergerg 2 oraph winfrey dfgdr dfgdf . output file neww.txt 1 lady gaga 2 oraph winfrey . . */ #include #include #include using namespace std; main() { char c; FILE *fp1,*fp2; if(fp1=fopen("e:\\ab.txt","r")) { cout<<"\n opened fp1"; } else { cout<<"\n failed fp1"; } if( fp2=fopen("e:\\neww.txt","w") ) { cout<<"\n opened fp2"; } else { cout<<"\n failed fp2"; } while(!feof(fp1)) { c=getc(fp1); while(c!='\n') { putc(c,fp2); c=getc(fp1); } putc('\n',fp2); c=getc(fp1); while(c!='\n') { c=getc(fp1); } c=getc(fp1); while(c!='\n') { c=getc(fp1); } } cout<<"\n End"; getch(); return 0; }

OpenCV installation with Visual Studio 2010

Hi all.I will show you how to install OpenCV library in windows with Visual Studio 2010 to use with Visual C++ Here I am show to install OpenCV Ver 2.2. 1. Download the OpenCV from source forge The link is : http://sourceforge.net/projects/opencvlibrary/files/opencv-win/ 2. Install the OpenCV to any drive.I have installed as C:\OpenCV2.2 3. Next open Visual Studio 2010.Select New>Project 4. Select Win32 Console Application from Visual C++ popup. 5. Give the project a name and press OK . I gave as 'helloworld' 6. Click Finish to continue.You can see a new file has opened where you can type your code. 7. Next select Project> <your project name> Properties . 8. Go to VC++ Directories and select Include Directories.There add the two links to that a) C:\OpenCV2.2\include b) C:\OpenCV2.2\include\opencv 9. Next Go to Library Directories and add the following link a) C:\OpenCV2.2\lib 10. Now Go to Linker option from the left

G Zapper

G Zapper ia utility that is used to be anonymous when you search in Google.Google stores a unique identifier in a cookie on the computer which is used to track keywords that are searched in it. They use this information to generate report, tracks user habits and test features. With G zapper you can protect users ID and search history. G zapper reads the Google cookie installed on users PC and displays the data it was installed and can get information how long user searches have been tracked and displays Google searches.G Zapper allows users to automatically delete or entirely block the Google search cookie from further installation. You can find about it in http://www.dummysoftware.com/gzapper.html

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