How To Use Grep In Linux?
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Grep is a powerful search tool in Linux. It can search through files and directories to find text that matches a given pattern.
To use grep, open a terminal window and type:
grep [options] pattern [file…]
The pattern is the text you want to search for. The file argument is optional; if omitted, grep will search through standard input (i.e. the keyboard).
Options may be used to modify the behavior of grep, such as only searching for exact matches (-x), ignoring case (-i), or displaying line numbers (-n).
For example, to search for the word “example” in a file called “myfile.txt”, you would use the command:
grep example myfile.txt
To search for the word “example” in all files in the current directory, you would use the command:
grep example *
For more information on grep, consult the man page or online resources.
Grep is a powerful tool used to search text for patterns, usually words or phrases.
1. To search and print the matched line from a file: grep “pattern“ filename
2. To search multiple files: grep “pattern“ file1 file2 file3
3. To view the line numbers of the matched pattern: grep –n “pattern“ filename
4. To search and replace the matched pattern with a new one: grep –e “pattern“ –o –r new_pattern filename
5. To search and display only the lines containing the pattern: grep –w “pattern“ filename
6. To search and display all the lines except those containing the pattern:
grep –v “pattern“ filename