grep for common commands of Linux

Title: Use of the grep command

role:grep can parse a line of text, get the keyword, if the row has a keyword, will be the whole row out.

grep [-ACINV] [--color=auto] ' Find string ' filename

First, the parameters

　　-A: binary files are searched for data in text mode

-C: Calculates the number of rows found matching a string

-I: Ignoring case differences, all case is considered the same

-N: Output line number

-O: Output only strings on matching

-V: Reverse selection, which shows the line without the "Find string" content

--color=auto: You can add a color display to the Found keyword section

Second, examples

Example 1: Finding all files in a directory that contain a specified string

Grep-n ' the './*

Example 2: Finding rows that contain tuse and test strings

Grep-n ' t[ue]st ' filename

Example 3: Finding blank lines and non-empty rows

Grep-n ' ^$ ' filename

Example 4:grep-v ' ^$ ' filename

grep for common commands of Linux