How linux uses shell search to find text
This article mainly introduces "linux how to use shell search to find text". In daily operation, I believe many people have doubts about how linux uses shell search to find text. Xiaobian consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful to answer the question of "how linux uses shell search to find text". Next, please follow the editor to study!
1. Use the find and xargs commands
The code is as follows:
Find dir | xargs grep str # dir refers to a directory
Find file | xargs grep str # file refers to a file 2.
The second method is to use the grep command directly
The code is as follows:
Grep str dir/* # dir refers to a directory, but does not search its subdirectories recursively
Grep-r str dir/* # recursively searches its subdirectories using the-r option
Grep str file # file refers to a file
3. The third method is to combine the above two.
The code is as follows:
#! / bin/bash
# find_str.sh
If [$#-lt "2]; then
Echo "Usage: `basename $0` path name [option]"
Exit 1
Fi
#!-r indicates recursive processing of subdirectories, and-I indicates ignoring case
Path=$1
Name=$2
Shift
Shift
For option in "$@"
Do
Case $option in
-r) dir_op= "- r"
-I) lu_op= "- I"
*) if [- n "$option"]; then
Echo "invalid option"
Exit 1
Fi
Esac
Done
Grep_str_of_file ()
{
File=$1
Str=$2
Out=$ (grep-n $lu_op "$str"$file")
If [- n "$out"-a "$file"! = "$0"]; then
Echo "$file: $out"
Fi
}
Find_str ()
{
If [- d "$1"]; then
For file in $1max *
Do
If ["$dir_op" = "- r"-a-d "$file"]; then
Find_str $file $2
Elif [- f "$file"]; then
Grep_str_of_file $file $2
Fi
Done
Elif [- f "$1"]; then
Grep_str_of_file $1 $2
Fi
}
Usage
The code is as follows:
$find_str $path $name
At this point, the study on "how linux uses shell search to find text" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!
