The grep lookup string for the Advanced Linux command

Purpose: Use the grep command to find a string that matches a condition in a file

Format: grep "Options" "Find Mode" "File name"

When looking for a string, you want to display the following:

1) file name-------------------------grep displays the target file name by default when looking

2) where the line number----------------------------use the-n option

Grep-rn "string" file name

R (Recursive) recursion

N (number) displays the line numbers of the target locations

String: The string to find

FileName: The target file to locate, or * to find all files and directories in the current directory

Grep-n "abc" Test1.txt find string ABC in Test1.txt

GREP-RN "ABC" * in When directory recursively finds string ABC

Attention:

Can join-W to match whole word

GREP-RNW "abc" Test1.txt "

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The grep lookup string for the Advanced Linux command