grep:tldr:cc5bb

grep: Search `stdin` for lines that do not match a pattern.

$ cat ${filename} | grep --invert-match "${search_pattern}"

try on your machine

This command can be broken down into two parts with a pipe (|) to connect them:

cat ${filename}: This command uses the cat command to display the contents of a file specified by the ${filename} variable. The ${filename} is a placeholder that should be replaced with the actual file name or file path. The cat command reads the contents of the file and sends them as output.
grep --invert-match "${search_pattern}": This command uses the grep command to search for lines in the input that do not match the specified ${search_pattern}. The --invert-match option or -v will exclude or invert the matches, meaning it returns lines that do not contain the ${search_pattern}. The ${search_pattern} is a placeholder that needs to be replaced with the actual pattern or regular expression you want to search for.

Combining these two commands with a pipe allows you to display the contents of the file (cat ${filename}) and then filter the output to show only the lines that do not match a specific pattern (grep --invert-match "${search_pattern}").

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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