egrep:tldr:9c456
This command is using the egrep command to search for a specific pattern in multiple files.
Explanation:
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${search_pattern}: This is a variable containing the pattern you want to search for. It can be a regular expression or a simple string pattern. -
${filename1} ${filename2} ${filename3}: These are variables representing the names of the files in which you want to search for the given pattern. You can specify multiple filenames separated by spaces. -
egrep: It is a command-line utility that searches for patterns in files using extended regular expressions. It is an enhanced version of thegrepcommand.
When this command is executed, egrep will take the value of ${search_pattern} and search for it in the files specified by ${filename1}, ${filename2}, and ${filename3}. It will then display the matching lines from those files in the output.