<caption><image_52>The image is a screenshot of a computer screen with a blue background. On the screen, there is a text that reads "grep's exit status" in white letters. Below the text, there are two options - "Match found" and "No match found". The text is in a bold, sans-serif font and is centered on the screen. The "0" option is slightly larger than the "1" option.</caption><caption><image_53>The image is a screenshot of a video playing on a TV screen. The background of the screen is black and there is a blue text in the center that reads "grap "31" phone list 11 echo "51 not found in list". The text is written in white and is in a bold, sans-serif font. The image appears to be a screenshot from a video.</caption><caption><image_54>The image is a screenshot of a computer screen with a blue background. On the screen, there is a text that reads "grep "51" phone list 11 echo "51 not found in list". The text is written in white and is in a bold, sans-serif font. The text appears to be a code or code snippet.</caption><caption><image_55>The image is a still from a video. It shows a man sitting in front of a computer monitor. He is wearing a white shirt and a red tie. He has a beard and is looking directly at the camera with a serious expression. The computer monitor displays a code on the screen. The background is blurred, but it appears to be an office or a library.</caption> arguments on the command line the second reason is not that the command failed but that it's using the exit status to identify something about the command itself an example would be the grep command the grep command uses its exit status to identify whether or not it found a match in the file if the grep command finds at least one match in the file it returns an exit status of zero success if it doesn't find any matches in the file it returns an exit status of non zero or failure by combining the grep command with a logical or operator we can tell the user when graph doesn't find the pattern in the phone list consider this command if the pattern is not found in the phone list and the grep command fails the logical or will execute the echo statement that says the pattern was not found in the phone list if the grep command finds the pattern it will succeed and the echo statement is not executed we can make pH find one sensitive to whether or not the pattern is found in the phone list by replacing the grep command with this logical statement i've made this change and stored it in the file pH find 2 on my
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