find command in Linux

The find command is used to find files in a specified directory. Any string preceding the parameter will be treated as the directory name to look for.

If you use this command without setting any parameters, the find command will look for subdirectories and files in the current directory. And all found subdirectories and files are displayed.

find syntax

find (选项) (参数)

Commonly used option parameters

-name <范本样式>: Specify a string as a template style for finding files or directories
-regex<范本样式>: Specify a string as a template style for finding files or directories
-size<文件大小>: Find files matching the specified file size
-typ<文件类型>: Find only files that match the specified file type
-path<范本样式>: Specify a string as a template style for finding directories
-perm<权限数值>: Find files or directories that match the specified permission value
-help或——help: Online help
-false: Set the return value of the find command to False
-true: Set the return value of the find command to True
-amin<分钟>: Find files or directories that have been accessed at a specified time, in minutes
-cmin<分钟>: Find files or directories that have been changed at the specified time
atime<24小时数>: Find the files or directories that have been accessed at the specified time, the unit is calculated in 24 hours
ctime<24小时数>: Find files or directories that have been changed at the specified time, in 24-hour units
-gid<群组识别码>: Find files or directories that match the specified group ID
-group<群组名称>: Find files or directories that match the specified group name
uid<用户识别码>: Find files or directories that match the specified user ID
user<拥有者名称>: The file or directory with the finder and the specified owner name

There are also some parameters ignored as enumeration:

Specific reference: Linux command collection - find command

example

Match against files or regular expressions

List all files and folders in the current directory and subdirectories

find .

/homeLook for .txtfilenames ending in a directory

find /home -name "*.txt"

Same as above, ignoring case, use iname.

find /home -iname "*.txt"

Find all files ending with .txtand in the current directory and subdirectories.cfg

find . -name "*.txt" -o -name "*cfg"

match file path or file

find /usr/ -path "*local*"

Match file paths based on regular expressions

find . -regex ".*\(\.txt\|\.pdf\)$"

Case-ignoring regular matching

find . -iregex ".*\(\.txt\|\.pdf\)$"

Negative parameter

find /home ! -name "*.txt"

Find by file type

find . -type 类型参数

Type parameter list:

f: normal file
l: symbolic link
d:content
c: character device
b: block device
s: socket
p：Fifo

eg:

find . -type f

find . -type d

Search by file timestamp

find . -type f 时间戳

There are three timestamps for each file in the Linux file system

Access time (-atime/day, -amin/minute): The last access time of the user.
Modification time (-mtime/day, -mmin/minute): The last modification time of the file.
Change time (-ctime/day, -cmin/minute): The last modification time of file data elements (such as permissions, etc.).

Search all files accessed in the last 7 days

find . -type -atime -7

Search all files that were accessed exactly 7 days ago

find . -type -atime 7

Search all files accessed over seven days

find . -type -atime +7

Search all files with access time longer than 10 minutes

find . -type f -amin +10

Match by file size

find . -type f -size 文件大小单元

b:block (512 bytes)
c:byte
w: word (2 bytes)
k: kilobytes
M: megabytes
G: Gbytes

Search for files larger than 10KB

find . -type f -size +10k

Search for files smaller than 10KB

find . -type f -size -10k

Search for files equal to 10KB

find . -type f -szie 10k

delete matching files

find . -type f -name "*.txt" -delete

Match based on file permissions

Search for files with permissions 777 in the current directory

find . -type f -perm 777

Find out the txt file whose permissions are not 700 in the current directory

find . -type f -name "*.txt" ! -perm 700

Find all files owned by user zhang in the current directory

find . -type f -user zhang

Find out all files owned by the current directory user group gzhang

find . -type f -group gzhang

Find files with length 0

find . -type f -empty