Command:

Explanation:

• grep: A command used to search for patterns within files.
• -r: This option tells grep to search recursively in all files within the specified directory and its subdirectories.
• "search_string": The string or pattern you want to search for. Replace this with the actual string you are looking for (e.g., "error", "config").
• /path/to/directory: The directory where the search will begin. Replace this with the actual path to the directory (e.g., /home/user/logs, /etc/).

Result:

This command will search through all files in the specified directory (and subdirectories) and return lines that contain the search string. It will show the file name and the matching line.

Example:

To search for the string “config” in all files in the /etc/ directory, you would use: