How to use the Linux find command

1.Linux command find

1.1. Brief description

find command is used to find files in the specified directory. Any string preceding the parameter will be treated as the name of the directory to be searched. If you do not set any parameters when using this command, the find command will search for subdirectories and files in the current directory. And display all the found subdirectories and files

1.2 High-frequency options

-name filename : 文件名称符合 filename 的文件 , 大小写敏感
-iname filname : 文件名称符合 name 的文件，忽略大小写
-empty : 空文件
-size：指定文件大小

1.3 find [path] -name [filename] Command

[Ann@localhost findtest]$ find ~ -name Linux 
/home/Ann/work/findtest/Linux

find: How to use the find command:

• ~: Search in the current user's home directory, also Different directories can be passed in

• -name: the -name command line parameter of the find command

• Linux: File name with search

• ##/home/Ann/work/findtest/Linux: Find the file name that exists in the current Ann user’s home directory Linux file

1.4

find [path] -iname [filename] Command

[Ann@localhost findtest]$ find ~ -iname linux
/home/Ann/work/findtest/Linux
/home/Ann/work/findtest/linux

• -iname: -iname command line parameters of find command, iname is not case-sensitive when used, so when we use the find command, we will search out two of them. File

• /home/Ann/work/findtest/Linux: Linux file

• with 'L' character uppercase

  /home/Ann/work/findtest/linux: linux file with 'l' character lowercase

1.5

find [path] -empty Command

Find empty files in the current directory

[Ann@localhost findtest]$ find . -empty 
./linux

• .: Current directory

• -empty: The -empty command line parameter of the find command. Using this command will list all empty files in the specified directory and subdirectories

In order to better use the

find command, we need to understand the ls or ll command.

ll: Abbreviation of ls -l command, view the properties of files or folders in the current directory

[Ann@localhost findtest]$ ll
total 4
-rw-rw-r--. 1 Ann Ann  0 Apr 10 23:11 linux
-rw-rw-r--. 1 Ann Ann 21 Apr 10 23:12 Linux

• -rw- rw-r--: The first '-' represents an ordinary file, and the following "rw-rw-r--" represents file permissions. The file permissions are accessible to the current Ann user. Read, write and not executable. For the Ann user group, it is read, write and not executable. For other users, it is read, write and not executable.

• 1: Number of file links

• Ann: The user to which the file belongs

• Ann: The user group to which the file belongs

• 0 or 21: file size in bytes

• Apr 10 23:11: File creation time

• linux or Linux: File name

1.6

find [path] - size [filesize]Command

1.6.1 find to find the specified file size

find [path] -size [fileszie] : Search for fixed-length files

[Ann@localhost testfind]$ find . -size 5k
./findtest
[Ann@localhost testfind]$ ll
-rw-rw-r--. 1 wudu wudu 5060 Apr 14 23:51 findtest

-size 5k: Search for files with a file size of 5k

1.6.2 Find the search interval file size

find [path] -size [filesize1] -[filesize2]: Find files larger than filesize1 and smaller than filesize2

[Ann@localhost testfind]$ find . -size +2k -size -6k
./findtest
[Ann@localhost testfind]$ ll
-rw-rw-r--. 1 Ann Ann 5060 Apr 14 23:51 findtest

-size 2k: File size Greater than 2k, means greater than

-size -6k: the file size is less than 6k, - means less than

combined Just find files larger than 2k and smaller than 6k

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