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  Basic Shell Programming in Unix. Hello Everyone, Today we will discuss about how to write simple shell program in Unix and in next blog we will discuss more about shell scripts. Before starting basic shell programming please go through my below blog related with Unix command so that you can able to write basic shell programs. https://dheeraj60.blogspot.com/2020/08/basic-and-some-advance-command-in-unix.html https://dheeraj60.blogspot.com/2020/08/basic-and-some-advance-command-in-unix.html https://dheeraj60.blogspot.com/2020/08/advance-unix-command-part1-dotcmdb.html https://dheeraj60.blogspot.com/2020/08/advance-unix-command-part-2-dotcmdb.html   I am writing one basic simple script which will list all the files in the current directory , also it will show the present working directory name as well as all the process running in the system. Suppose we create a test.sh script , the scripts would have the .sh extension. Before you add anything else to your script, you need to alert