Text ProcessingLesson 17Free preview

Bash Search Text (grep)

This lesson is part of Bash · All levels

Summary

The grep command searches for lines containing specific patterns in the file or from the input pipe. It supports important options such as -i to ignore capital letters, -n to line numbers, and -r to recursive search. The pattern is considered regex, so mark the quotation so that the specific character is not misinterpreted shell.

Key points

Grep file patterns showing matching lines
I ignore the capitalization, -n display the line number
R looking for recursive across the subdirectory
v displays an unmatched line

Full lesson

Code examples and quizzes

Full lessons, code examples, and quizzes are available to subscribers. 5 questions.