How Do I Search for a Line Through a File in Linux?

The grep command searches through the file, looking for matches to the pattern specified. To use it type grep , then the pattern we’re searching for and finally the name of the file (or files) we’re searching in. The output is the three lines in the file that contain the letters ‘not’.

How do you find a line in a file in Linux?

Grep is a Linux / Unix command-line tool used to search for a string of characters in a specified file. The text search pattern is called a regular expression. When it finds a match, it prints the line with the result. The grep command is handy when searching through large log files.

How do I search for a specific text in a file in Linux?

Finding text strings within files using grep

1. -r – Recursive search.
2. -R – Read all files under each directory, recursively. …
3. -n – Display line number of each matched line.
4. -s – Suppress error messages about nonexistent or unreadable files.