<caption><image_16>The image shows a man sitting in front of a computer monitor. He is wearing a white shirt and a maroon tie. He has a beard and is looking directly at the camera with a slight smile on his face. The computer monitor is white and has a black screen. Behind the man, there is a bookshelf filled with books. The image appears to be taken in an office or a library.</caption><caption><image_17>The image is a screenshot from a video interview. It shows a man standing in front of a white wall with a painting hanging on it. He is wearing a white collared shirt and a maroon tie with a floral pattern. He has a beard and is looking directly at the camera with a serious expression on his face. The image appears to be taken from a low angle, with the man's body slightly turned to the side.</caption><caption><image_18>The image is a screenshot of a computer screen with a message that reads "Welcome to Berkeley Decision/System's System Administrator is rich. Have a great day." The message is written in green text on a black background. Below the message, there is a green checkmark with a dollar sign on it. The message appears to be a welcome message for a system administrator.</caption> - and then four digits we'll be using this example during this course so that will have something to refer to as we create our applications in addition to executing commands that you enter on the command line and supplying you with a rich set of meta characters to describe processes you're trying to create the shell will also read your commands out of a file this allows you to create your own application scripts as they're called by simply putting a set of unix commands in a file instead of entering these commands one at a time you enter the name of the file that contains these commands and the shell will read these command lines and execute them one at a time out of the file you've identified this makes it easier for you to run multiple commands successively and also allows you to hide the contents of your commands behind the name of the file let me give you an example suppose you have a need to search through a file in this case let's assume we're using the phone list instead of entering the command line directly i've started in a file
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