Vimal MLearn to search strings recursively across files and directories, use multiple patterns, perform case-insensitive searches, and display line numbers in your search results.
Basic Parameters Explanation
-r – Recursively searches through all directories and subdirectories.
-e – Specifies multiple search patterns.
-i – Performs a case-insensitive search.
-n – Displays line numbers with the matching lines.
Command: Search Recursively for a String
Searches all files within a directory and its subdirectories for "search_string".
grep -r "search_string" /path/to/directory Command: Specify Multiple Patterns Recursively
Searches for multiple patterns across all files in a directory and its subdirectories.
grep -r -e "pattern1" -e "pattern2" /path/to/directory Command: Case-Insensitive Search in a File
Searches for "error" in a file, ignoring case differences.
grep -i "error" filename.txt Command: Recursive and Case-Insensitive Search
Searches all files in /var/log for "error", ignoring case, and searching through all subdirectories.
grep -ri "error" /var/log Command: Search with Line Numbers
Displays the line numbers along with the lines that match "search_string" in all files within a directory and its subdirectories.
grep -rn "search_string" /path/to/directory
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