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This article mainly introduces "the usage of find grammar in Linux". In daily operation, I believe that many people have doubts about the usage of find grammar in Linux. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about "the usage of find grammar in Linux". Next, please follow the editor to study!

The find syntax is as follows:

Find (option) (parameter)

Common examples

Find by file name

Lists all files in the current directory and subdirectories

Find.

Find the file named 11.png in the current directory

Find. -name "11.png"

Find all the jpg files in the current directory

Find. -name "* .jpg"

Find the jpg file and png file in the current directory

Find. -name "* .jpg"-o-name "* .png"

Find files in the current directory that do not end in png

Find. !-name "* .png"

Find according to regular expression

Note: regular expressions are more complex than previously thought and support several types. You can refer to here

Find the png file in the current directory with numeric file names.

Find. -regex "\. / * [0-9] +\ .png"

Find according to the path

Find the file / path that contains wysiwyg in the path in the current directory.

Find. -path "* wysiwyg*"

Find by file type

Filter file types through-type.

F ordinary file

L symbolic connection

D directory

C character device

B block equipment

S socket

P Fifo

For example, find the files in the current directory that contain wysiwyg in the path.

Find. -type f-path "* wysiwyg*"

Limit the depth of search

Find all the png in the current directory, not including subdirectories.

Find. -maxdepth 1-name "* .png"

Correspondingly, there is also the mindepth option.

Find. -mindepth 2-maxdepth 2-name "* .png"

Based on file size

Filter the file size through-size. The supported file size units are as follows

B-block (512 bytes)

C-byte

W-word (2 bytes)

K-kilobytes

M-megabytes

G-gigabyte

For example, find files with a file size of more than 100m in the current directory

Find. -type f-size + 100m

According to access / modification / change time

The following time types are supported.

Access time (- atime/ days,-amin/ minutes): the last time the user visited.

Modification time (- mtime/ days,-mmin/ minutes): one modification time for the file *.

Change time (- ctime/ days,-cmin/ minutes): file data elements (such as permissions, etc.) * a modification time.

For example, find out the files that have been modified within 1 day

Find. -type f-mtime-1

Find out the files that have been accessed in the last week

Find. -type f-atime-7

Move the log files in the log directory for more than a week to / tmp/old_logs.

Find. -type f-mtime + 7-name "* .log"-exec mv {} / tmp/old_logs\

Note: {} is used in conjunction with the-exec option to match all files, which is then replaced with the appropriate file name.

In addition,\; is used to indicate the end of the command, and if it is not added, there will be the following prompt

Find:-exec: no terminating ";" or "+"

According to the authority

Through-perm to achieve. For example, find files with permissions of 777 in the current directory

Find. -type f-perm 777

Find out the php files in the current directory whose permissions are not 644.

Find. -type f-name "* .php"!-perm 644

According to the file owner

Find out the file whose owner is root

Find. -type f-user root

Find out the files whose group is root

Find. -type f-group root

Execute the command when the file is found

Through-ok, and-exec to achieve. The difference is that-ok will confirm twice before executing the command, and-exec will not.

Take a look at the actual example. Delete all js files in the current directory. The effect of using-ok is as follows. There is a second confirmation before deletion.

➜find find. -type f-name "* .js"-ok rm {}\; "rm. / 1.js"?

Try it-exec. Just delete it.

Find. -type f-name "* .js"-exec rm {}\

Find the empty file

Examples are as follows

Touch {1.. 9} .txt echo "hello" > 1.txt find. -empty at this point, the study of "the usage of find grammar in Linux" 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!

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