Unix Tutorial

 
 
 

Basic Programming

Count and report no of entries in subdirectory Calculate sum of its digits Copy, rename, delete, edit file Binary search method Copy abc.txt into xyz Find avg of no entered in command line Broadcast msg to specified user when loged on Find lines in file with words longer than 4 char Search files and rename Morning, afternoon, Evening wish based on time List of file have read, write, execute permission

String Programs

Rename file from first1.txt to first2.txt Print first 5 odd numbers Prepare marksheet of the student Name of users who are login Compare two files List hidden files in current directory Separate colon from given item Calculate area & perimeter of rectangle DB operation like view, add, delete records Bubble sort Change permission of file Find smallest of three numbers Change term, prompt and user list of unix sys Count char, lines and words in particular file Check every argument is file or dir Print name of sub-dir present in current dir

Sorting Programs

List all files start with a or A Calculate 9/5 Receive log name, obtain info from /etc/passswd Count number of words, lines and char of file Count no.of words in file abc Subtraction on operands dec, bin, oct, hex Create pyramid of number Display exit status search string from string Receive list of file name which are wordfile Calculate the gross salary Cconcatenate contents of 2 files

General Programs

Combine two files to single file Find gcd for 2 given numbers Command work as spelling checker Check whether string is palindrome or not Check dir if it exists then change the path Identify directory and executable file Check two file contents are same or not Prime numbers from 1 to 300 Check file is ordinary or not Display message, user name, terminal name etc Identify directory and executable file Find out sum of numbers using command line arg Find sum, avg and product of four integers Compare string, concat, length, occurrence of word Make file,dir display cur dir,list,make,change dir Get today\’s date Menu driven script for Copy, Remove, Move file

Directory Programs

Sort file abc.txt and save sorted file in xyz.txt Find largest among 3 given numbers Information about all current program running Concate two string find length of resultent string Change permission of file as 644 Create directory and remove directory Display Current dir, List dir, Make, Change dir Calculate factorial of number Spell cmd on file, Collect list - spelling error Echo suitable message if less then ten char Append abc.txt, xyz .txt Display digit are in odd position in 5 digit no Exchange values of two variables Find position of substring in given string Delete file from every dir above present dir Calendar of December 2006 Reverse the contents of file

Date, time, year Program

Convert first1.txt file to hidden file Find sum, avg and product of four integers Take Logname,UID find terminal this user logged in Machine\’s name in the network Find out common lines between two files Display current working directory Check dir directory if it exists then change path Menu driven calculator Measure size of a file Sort file See content of the file Add, sub and mul 2 no passed as command line arg Reverse number supplied by user Count no of words, char, space, symbols Check whether such files already exist

Searching Programs

Count number of words, lines and char of file Find sum of digits of number Find total no. of user and currently loggedin Print message shown in description Count no of character in file Names of all sub-directory in current directory Hard Link, Soft Link, Counting each of links Leap year or not Copy first file to second, third to four Convert distance in meters,feet,inches,centimeter Change extension of an existing file Sort Numeric file Create file with 10 lines, display from 5 to 8 Find sum of series sum=1+1/2+...+1/n Functionality of “mv” command with example Convert contents into uppercase in particular file Renaming each files in dir Delete directory with files Display ls -l command result for inputted file Calculate 3+4+5+6 Combine file in file horizontally and vertically Show msg “Good Morning/Good afternoon on time Count no.of lines in file abc Addition on two operands dec, bin, oct, hex Display all user name, or user of group Display time in word Name,size of file in dir exceeding 1000 byte Enhance calendar to accept any month Find lines containing number in file

File Programs

Split large file into small files Display alternate digit in 7 digit number Users currently working Find position of substring in given string Sort numeric file Create and remove more than one dir together Check inputted dir is in current directory or not Find value of number raised to power of another Display name of files having multiple links Display message, user name, terminal name etc Display file in column format Menu driven calculator using case Ask your name, program name, enrolement number Perform string replacement in file Delete zero sized files from dir, sub-dir Calendar of 2007 Convert file to lower case or upper case

Mathematical Program

List all hidden files in current directory Display digit which are odd position in 5 digit no Display login name,terminal name,date,time Count length of user input string Find out difference between two files Remove entire directory structure
 

Shell script to perform operations like compare string, concatenate, find length, occurrence of word in a string and reverse a string

 
clear
i=\"y\"
a=0
t=0
while [ $i = \"y\" ]

do
clear
echo \"1.Compare 2 strings :\"
echo \"2.Concatanet string\"
echo \"3.Find length of string\"
echo \"4.Occurance of word\"
echo \"5.Reverse of string\"
echo \"6.Exit\"
echo \"Enter your choice\"
read ch
case $ch in
    1)echo \"Enter first String\"
     read s1
     echo \"Enter second string \"
     read s2
     if [ $s1 = $s2 ]
     then    
        echo \"Two strings are equal \"
     else
        echo \"Two strings are not equal\"
     fi;;
    2)echo \"Enter one string \"
      read s1
     echo \"Enter second string \"
     read s2
     echo $s1 $s2;;
    3)echo \"Enter any String\"
     read s1
     t=\`echo $s1|wc -c\`
     t=\`expr $t - 1\`
     echo \"Length of \"$s1\" is \"$t;;
    4)echo \"Enter any String \"
     read s1
     echo \"Enter word u want to find occurance of:\"
     read c1
     t=\`echo $s1|wc -c\`
     t=\`expr $t - 1\`
     echo \"length \"$t
         while [ $t -ne 0 ]
     do
          temp=\`echo $s1|cut -c $t\`
      temp2=\`echo $temp2 $temp\`
          #echo $temp2
       if [ $temp2 = $c1 ]
       then
        a=\`expr $a + 1\`
        t=\`expr $t - 1\`
       else
        t=\`expr $t - 1\`
       fi
    done
     echo \"Occurance of \"$c1\" is \"$a;;
    5)echo \"Enter any string :\"
      read s1
       t=\`echo $s1|wc -c\`
           t=\`expr $t - 1\`
           echo \"length \"$t
           while [ $t -ne 0 ]
       do
         temp=\`echo $s1|cut -c $t\`
         echo $temp
         temp2=\`echo $temp2 $temp\`
         t=\`expr $t - 1\`
      done
      echo $temp2;;
    6)exit;;
    *)echo \"Invalid choice\";;
esac
echo \"Do u want to continue ?\"
read i
if [ $i != \"y\" ]
then
    exit
fi
done

    Related Post:
  1. Shell script to check dir directory if it exists then change the path, if not then create dir with that name and also check for file name not exists
  2. Script to make File and Directory Management Operations menu based : Display Current directory, List Directory, Make Directory, Change Directory etc
  3. Write a script to enhance the calander to accept any month as mm or mmm or only year as yyyy or both month and year
  4. How would u get online help of cat command?
  5. Write a shell program to count number of words, characters,white spaces and special symbols in a givin text
  6. Shell script to measure size of a file
  7. Write a shell program to concatenate the contents of 2 files
  8. Find the lines containing a number in a file
  9. How would you count the number of words, lines and character of a file?
  10. Shell script which whenever gets executed displays the message “Good Morning/Good afternoon /Good Evening “depending on the time it get executed
  11. How to create a directory and remove a directory?
  12. Write a shell program to add, subtract and multiply the 2 given numbers passed as command line arguments
  13. Display file in column format
  14. Menu driven program which has the options Contents of etc/passwd, List of the users who have logged in, Present working directory
  15. Write a shell script to find the average of the numbers entered in command line
  16. Shell script that takes filename or the filename with its full path as an input during execution and display ls -l command result for inputted file
  17. How would u display the hidden files?
  18. How would you know name of the users who are login?
  19. Write a shell script, which will receive any number of filenames as arguments .The shell script should check whether such files already exist.
  20. Shell script which would Receive the log name during execution ,obtain information about it from /etc/passswd and display this information on screen