<caption><image_23>The image is a portrait of a middle-aged man with a beard and mustache. He is wearing a white collared shirt and a maroon tie. He has a serious expression on his face and is looking directly at the camera. The background is a plain white wall with a framed picture hanging on it. The man appears to be in his late 40s or early 50s.</caption><caption><image_24>The image is a black rectangular screen with a white background. On the screen, there is a text written in blue that reads "grep $1 phone.list". The text is written in a bold, sans-serif font and is centered on the screen. The text appears to be a list of items that need to be paid for a phone.</caption><caption><image_25>The image shows a man sitting at a desk in front of a computer. He is wearing a white shirt and a red tie. He has a beard and is looking directly at the camera with a slight smile on his face. Behind him, there is a bookshelf and a computer monitor. The man appears to be in his late 40s or early 50s.</caption><caption><image_26>The image is a screenshot of a computer screen with a message written in green text. The message reads "Have a great day." Below the message, there are two options - "cat phsmith" and "phone.list". 

The first option is "$cat.phsmith", which is a list of phone numbers. The second option is a phone number, which is 7-7989. The phone number is $1 phone.list.

There is also a green bar at the bottom of the screen, which appears to be a battery indicator. The background of the image is black, and the text is white.</caption><caption><image_27>The image is a screenshot of a computer screen with a dark blue background. On the screen, there is a text that reads "phfind Smith" in white letters. Below the text, there are two arrows pointing towards the left and right side of the screen. The arrows are labeled "SO" and "S1". The text is written in a simple, sans-serif font and is centered on the screen in the middle of the image.</caption> I put dollar one the shell will take the first argument off the command line and put it in place of where I've stored the dollar one in the file this is how I can take arguments off the command line and insert them into my search command for the phone list consider this command line note that I've put a dollar one in place of the grep pattern I've stored this in a file called pH find when I run the pH find command the argument that I put on the command line gets inserted by the shell for the dollar one before the command line in the file gets executed in essence taking the pattern I've passed a pH fine and passing that pattern on to the grep command and searching the phone list for it for example to search for someone named Smith in the phone list I simply enter pH fine with the name Smith what happens when you execute this command is that the shell takes the word Smith off the command line and puts it in dollar one when it's inside the file and it sees
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