grep:tldr:1682e

The command grep "${search_pattern}" ${filename} is used to search for a specific pattern within a given file.

Here is a breakdown of each part of the command:

• grep is a command-line tool used for searching text patterns in files.
• "${search_pattern}" is a placeholder for the pattern that you are searching for. The pattern must be enclosed in double quotes (") to preserve any special characters that may be present in it. You can use regular expressions or simple strings as the search pattern.
• ${filename} is a placeholder for the name of the file you want to search within. This could be a single file or multiple files separated by spaces. You can also use wildcards like * to search for files with a specific pattern of names.

When the command is executed, grep will search for the given search_pattern within the specified filename(s) and display the lines that match the pattern.