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sed:tldr:c733c

sed: Print just a first line to `stdout`.
$ ${command} | sed -n '1p'
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This command is running a shell command and piping its output to the sed command. Let's break it down:

${command}: This is a placeholder that represents the command whose output we want to process with sed. It could be any valid shell command.

|: The pipe symbol | in Unix or Linux shell is used to redirect the output of one command as the input to another command. In this case, we are redirecting the output of ${command} to the sed command.

sed: sed stands for "stream editor" and is a powerful Unix utility for text processing and manipulation. It reads text input line by line, applies specified operations, and produces the modified output.

-n: This option tells sed to suppress automatic printing of input lines. Without this option, sed would print every line of the input stream.

'1p': This is a sed command that specifies an operation to be performed on the input. In this case, 1p tells sed to print the first line of the input.

So, when ${command} runs and produces output, it is piped to sed, which only prints the first line of that output.

This explanation was created by an AI. In most cases those are correct. But please always be careful and never run a command you are not sure if it is safe.
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