cli-sedHow can I use the CLI sed command to generate output?

The sed command is a powerful command line tool for manipulating text files. It can be used to generate output from a given input.

For example, to print the first line of a file, the following command can be used:

sed -n '1p' file.txt

This will output the first line of the file file.txt:

This is the first line of the file.

The command consists of the following parts:

• sed: The command itself.
• -n: Suppress default output.
• 1p: Print the first line of the file.
• file.txt: The file from which the output should be generated.

Other common uses of sed include replacing text in a file, deleting lines of text, and inserting text into a file. For more information, see the GNU sed manual.

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