The -R is dereferenced search which means it will follow the symbolic links to go to the original file (which may be located in some other part of the system). So, what's the difference grep -r and grep -R? Only one, actually. There is also a -R option for recursive search and it works almost the same as the -r option. Here's the result: Recursive search with -r option of grep command Here's the recursive search I performed in the previous example to do a grep search in the current folder: grep -r simple. With this option, grep will look into all the files in the current (or specified) directory and it will also look into all the files of all the subdirectories. Grep provides a -r option for the recursive search. Grep recursive search in all subdirectories of a directory Now that you know that, let's see how you can perform a recursive search with grep so that it also looks into the files in the subdirectories. If you are not in the same directory where you want to perform, you can specify the directory path and end it with /* grep search_term directory_path/*īasically, you are using the wild card to expand on all the elements (files and directories) of the given directory. Search in all files of a directory with grep Since you cannot directly grep search on a directory, it will show "XYZ is a directory" error along with search results. This will search in all the files in the current directories, but it won't enter the subdirectories. The wild card actually substitutes with the name of all the files and directories in the current directory. To search for the word 'simple' in all the files of the current directories, just use wild card (*). Except empty.txt, all files contain the term 'simple' on which I'll perform the grep search. Here's the directory structure I am going to use in this example. Let me show you all this in details with proper examples so that it is easier for you to understand. You may also specify the directory path if you are not in the directory where you want to perform the search: grep -r search_term directory_path You can make grep search in all the files and all the subdirectories of the current directory using the -r recursive search option: grep -r search_term. It only searches in all the files in the current directory. If you want to search all the files in a directory with grep, use it like this: grep search_term * Usually, you run grep on a single file like this: grep search_term filename Grep is an excellent tool when you have to search on the content of a file. This results in this very different output: That's nice, but what if I want to see the last modification time of these files, or their filesize? No problem, I just add the ls -ld command to my find command, like this: In my current directory, the output of this command looks like this: To get started, this find command will find all the *.pl files (Perl files) beneath the current directory: type f -name "*.java" -exec grep -l StringBuffer \ įrom time to time I run the find command with the ls command so I can get detailed information about files the find command locates. type f -not -name "*.html" # find all files not ending in ".html"įind files by text in the file (find grep)įind. type f \( -name "*cache" -o -name "*xml" -o -name "*html" \) # three patternsįind files that don't match a pattern (-not)įind. iname foo -type f # same thing, but only filesįind. iname foo -type d # same thing, but only dirsįind. iname foo # find foo, Foo, FOo, FOO, etc.įind. name foo.txt # search under the current dirįind /users/al -name Cookbook -type d # search '/users/al' dirįind /opt /usr /var -name foo.scala -type f # search multiple dirsįind. Almost every command is followed by a short description to explain the command others are described more fully at the URLs shown:įind / -name foo.txt -type f -print # full commandįind / -name foo.txt -type f # -print isn't necessaryįind / -name foo.txt # don't have to specify "type=file"įind. If you just want to see some examples and skip the reading, here are a little more than thirty Linux find command examples to get you started. In this article I’ll take a look at the most common uses of the find command. It can search the entire filesystem to find files and directories according to the search criteria you specify. Besides using the find command to locate files, you can also use it to execute other Linux commands ( grep, mv, rm, etc.) on the files and directories that are found, which makes find even more powerful. Linux/Unix FAQ: Can you share some Linux find command examples?
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