How To Write First UNIX Korn Shell Script Program

by Vivek Gite on January 13, 2008 · 6 comments

Can you tell me how to write a UNIX korn shell script program? I'm new to UNIX scripting and HP-UX UNIX operating system.

Korn shell scripting under UNIX / Linux can be used to automate lots of stuff. It easy to write a shell script. You must know how to use a text editor such as vi to write a script.

Writing your first Korn shell script

Let us write a shell program to print knowledge is power on screen. Type the following command to open file:
vi hello.ksh
The first line should be as follows:

#!/bin/ksh

It is called a shebang. It consists of a number sign and an exclamation point character (#!), followed by the full path to the interpreter such as /bin/ksh. All scripts under UNIX execute using the interpreter specified on a first line.
Next append code as follows:

# A shell script to print message
# Written by Tom - Jan/13/2008
print "Knowledge is power"

Save and close the file. At the end your script should look like as follows:

#!/bin/ksh
# A shell script to print message
# Written by Tom - Jan/13/2008
# ------------------------------
print "Knowledge is power"

Set executable permission

Type the following command to set executable permission:
chmod +x hello.ksh

Run your korn shell script

Type the following command:
./hello.ksh
Sample output:

Knowledge is power

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{ 6 comments… read them below or add one }

1 Scott December 8, 2008

great job on youe xplainations. I enjoy your site

2 Suhail June 16, 2009

Its a good intro and i had successfully wrote my first script, but its better to have a vi or any other editor tutorial mix with this, i first learn the vi and then this one, and it works.

Anyways a goood one. Thanks once again.

3 suraj bhagat September 23, 2009

hi,
please give me some programs which r follows.

1)write a shell script program take two strings & check that the string are same or not

2) sript program to take marks of five subject of a students with name & display the grade in which he is passed .

3) enter a character from a user & check that itbis a lower case letter, upper case letter, digit, special char.

4)write a program to find the string is start with ovel, digita, or ends with digit, ovel & the word contains of five letters.

5)create a file student.dat which contain details of student as rool no.,name,want to be, on plattform, birthdate.

4 Bill Watson March 1, 2011

I am new to this program and I do not know where to begain. This is my directions and yes I am s student trying to learn this. and no I am not looking for you to do it for me just help me along.

5 Bill Watson March 1, 2011

Write a Unix shell script (one program) called Project1_lastname (your lastname). This script will do the following tasks:

Using “if” statement checks for a file called “student.txt” in the current directory. Removes (deletes) the file if it exist. This file will collect last name, first name, and grade for 5 students.

Use a while loop to get the information (last name, first name, and grade) for 5 students. Grades should be 0-100. Use three different variable names (fname, lname, and grade) to read the data from the keyboard.

Store the data read from the keyboard in a file called “student.txt”. After reading all the data for 5 students, display contents of student.txt file on the monitor.

6 shiva December 5, 2011: i want something more apart from this.
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