Find command usage in Linux

I. Common usage examples of find in Linux

· Find path-Option [-print] [-Exec-OK command] {}\;

#-Print: output the searched files to the standard output

#-Exec command {}\; ----- execute the command operation on the retrieved file. There is a space between {} And \;

#-OK is the same as-exec, however, you only need to ask the user before the operation ======================================== ===============================- name filename # search for a file named filename

-Perm # search by execution permission

-User Username # search by file owner

-Group groupname # search by group

-Mtime-N + N # Find the file based on the file change time.-N indicates that the file is less than N days, and + N indicates that the file is earlier than N days.

-Atime-N + N # query gin by file access time: 0px ">-Perm # query by execution permission

-User Username # search by file owner

-Group groupname # search by group

-Mtime-N + N # Find the file based on the file change time.-N indicates that the file is less than N days, and + N indicates that the file is earlier than N days.

-Atime-N + N # search for files based on the file access time.-N indicates that the file is less than N days, and + N indicates that the file is earlier than N days.

-Ctime-N + N # Find the file based on the file creation time.-N indicates that the file is less than N days, and + N indicates that the file is earlier than N days.

-Nogroup # Check for files with no valid group, that is, the file group does not exist in/etc/groups.

-Nouser # Check files with no valid owner, that is, the file owner is not stored in/etc/passwd.

-Newer F1! F2 file search,-N refers to N days or less, + N refers to N days ago

-Ctime-N + N # Find the file based on the file creation time.-N indicates that the file is less than N days, and + N indicates that the file is earlier than N days.

-Nogroup # Check for files with no valid group, that is, the file group does not exist in/etc/groups.

-Nouser # Check files with no valid owner, that is, the file owner is not stored in/etc/passwd.

-Newer F1! F2 # Query files whose modification time is earlier than F1 but earlier than F2

-Type B/D/C/P/L/F # Check Block devices, directories, character devices, pipelines, symbolic links, and common files.

-Size N [c] # query objects with a length of N [or n Bytes]

-Depth # search for the local directory before entering the subdirectory

-Fstype # Query files whose change time is newer than F1 but earlier than F2

-Mount # The mount point of the file system is not crossed during file query.

-Follow # If a symbolic link file is encountered, the file indicated by the link will be tracked.

-Cpio # Use the cpio command to back up the matching files to the tape device.

-Prune # ignore a directory ====================================== ============================

$ Find ~ -Name "*. txt"-print example: Check the. txt file and display it in home ‑.

$ Find.-Name "*. txt"-print

$ Find.-Name "[A-Z] *"-pri26nbsp; # Use the cpio command for matching files to back them up to tape Devices

-Prune # ignore a directory $ find.-Name "[A-Z] *"-print # Query files starting with an uppercase letter

$ Find/etc-name "Host *"-print # Query files starting with host

$ Find.-Name "commana-z00000000a-z0000000000000--9000000000--90000.txt"-print # query TXT files starting with two lower-case letters and two numbers

$ Find.-Perm 755-print

$ Find.-Perm-007-exec LS-l {}\; # check whether all files that can be read and written by users are the same as-Perm 777

$ Find.-type D-Print print the directory structure

$ Find. ! -Type D-print Print non-directory files Find/usr/include-name '*. H'-exec grep af_inef6 {}\;Because grep cannot Recursively search for subdirectories, it can be used with find. Find the af_inef6 string in the. h file in all/usr/include subdirectories.

$ Find.-type L-Print $ find.-size + 000000c-print # Query files with a length greater than 1 MB

$ Find.-size 100c-print # Query files with a length of C

$ Find.-size + 10-print # Check for files with a length of over 10 expired items (1 piece = 512 bytes) $ CD/

$ Find etc home apps-depth-print | cpio-ivcsc65536-o/dev/rmt0

$ Find/etc-name "passwd *"-exec grep "cnscn" {}\; # check whether a cnscn user exists

$ Find.-Name "Yao *" | xargs File

$ Find.-Name "Yao *" | xargs echo "">/tmp/CORE. Log

$ Find. -Name "Yao *" | xargs chmod o-w ======================== ======================================== find-name secrets l * search for file

Find-name extension L * fprint file searches for files starting with extension l in the current directory, and outputs the results to the file.

Find-name AP *-o-name may * search for files starting with AP or may

Find/mnt-name tom.txt-FTYPE vfat find the file named tom.txt and the file system type is vfat under/mnt

Find/mnt-name t.txt! -FTYPE vfat: Find the file named tom.txt under/mntand the file system type is not vfat.

Find/tmp-name wa *-type l search for files starting with Wa and whose type is symbolic link under/tmp

Find/home-mtime-2 check files modified in the last two days under/home

Find/home-atime-1. Check the files that have been accessed within one day.

Find/home-mmin + 60 check files modified 60 minutes ago under/home

Find/home-Amin + 30 check files that have been accessed in the last 30 minutes

Find/home-newer tmp.txt check for files or directories that are earlier than tmp.txt in/home.

Find/home-anewer tmp.txt check the files or directories with a time closer to tmp.txt under/home.

Find/home-used-2 list the files or directories that have been accessed within two days after the files or directories have been modified.

Find/home-user cnscn list the files or directories belonging to the user's cnscn in the/Home Directory

Find/home-UID + 501 list files or directories with user IDs greater than 501 in the/Home Directory

Find/home-group cnscn list/home files or directories in which the group is cnscn

Find/home-gid 501 list/home files or directories with group ID 501

Find/home-nouser: list files or directories that do not belong to local users in/home.

Find/home-nogroup list files or directories in/home that do not belong to the Local Group

Find/home-name tmp.txt-maxdepth 4 list/The tmp.txt in homecan be found at a maximum of three layers.

Find/home-name tmp.txt-mindepth 3 query from Layer 1

Find/home-empty

Find/home-size + 512 K Query files larger than K

Find/home-size-512 K to query files smaller than K

Find/home-links + 2 check files or directories with hard connections greater than 2

Find/home-Perm 0700 check the file or directory with the permission of 700

Find/tmp-name tmp.txt-exec cat {}\;

Find/tmp-name tmp.txt-OK RM {}\; find/-Amin-10 # Find the file accessed in the last 10 minutes of the system

Find/-atime-2 # search for files accessed in the last 48 hours in the system

Find/-empty # search for files or folders that are empty in the system

Find/-group cat # Find the groupcat file in the system

Find/-mmin-5 # search for the files modified in the last 5 minutes in the system

Find/-mtime-1 # search for files modified in the last 24 hours in the system

Find/-nouser # search for files belonging to the void user in the system

Find/-user Fred # search for files belonging to the user Fred IN THE SYSTEM

Query all common files in the current directory

-------------------------------------------------------------------------------- # Find.-Type F-exec LS-l {}\;

-RW-r -- 1 Root 34928 2003-02-25./CONF/httpd. conf

-RW-r -- 1 Root 12959 2003-02-25./CONF/magic

-RW-r -- 1 Root 180 2003-02-25./CONF. d/readme

Query all common files in the current directory and use the LS-l command in the-e x e c option to list them.

========================================================== ==========

In the/l o g s directory, find the files whose changes were earlier than 5 days and delete them:

$ Find logs-type F-mtime + 5-Exec-OK RM {}\;

========================================================== ==========

Query the files modified on the current day

[Root @ book class] # Find./-mtime-1-type F-exec LS-l {}\;

========================================================== ==========

Query the file and ask if you want to display it

[Root @ book class] # Find./-mtime-1-type F-OK ls-l {}\;

<Ls.../classdb. Inc. php>? Y

-RW-r -- 1 cnscn 13709 January 12 12:22./classdb. Inc. php

[Root @ book class] # Find./-mtime-1-type F-OK ls-l {}\;

<Ls.../classdb. Inc. php>? N

[Root @ book class] #====================================== ======================

Query and submit it to awk for processing

[Root @ book class] # Who | awk '{print $1 "\ t" $2 }'

Cnscn pts/0 ========================================== ==================

Awk --- grep --- sed [root @ book class] # DF-k | awk '{print $1}' | grep-V 'none' | sed s "// Dev \ /// G"

File System

Sda2

Sda1

[Root @ book class] # DF-k | awk '{print $1}' | grep-V 'none'

File System

/Dev/sda2

/Dev/sda1

1) Search for all * In/tmp *. h, search for "syscall_vector" in these files, and print out all file names containing "syscall_vector" a) Find/tmp-name "*. H "| xargs-n50 grep syscall_vector

B) grep syscall_vector/tmp/*. H | cut-d': '-F1 | uniq> filename

C) Find/tmp-name "*. H"-exec grep "syscall_vector" {}\;-print

2) Find/-name filename-exec Rm-RF {}\;

Find/-name filename-OK Rm-RF {}\;

3) For example, to search for files larger than 3 m on a disk:

Find.-size + 3000 K-exec LS-LD {};

4) copy the find to another place.

Find *. C-exec CP '{}'/tmp ';' if a special file exists, you can use cpio or the following syntax:

Find Dir-name filename-print | cpio-PDV newdir

6) Search for the files changed at 16:36:37,-11-30.

# A = 'Find./-name "* PHP" '| LS-l -- full-time $ A 2>/dev/null | grep "16:36:37

Ii. usage of the find command in Linux

1. Basic usage:

Find/-name file nameFind ver1.d ver2.d-name '*. c'-print find the ver1.d and ver2.d *. c files and print them. Find.-type D-print find from the current directory, only find the directory, and print the path name. It can be used to print the directory structure.

2. No error search:

Find/-name access_log 2>/dev/null

3. Search by size:

Find/-size 1500c (search for 1,500-byte files; c Indicates bytes)

Find/-size + 1500c (find files larger than 1,500 bytes, + indicates files larger)

Find/-size + 1500c (find files smaller than 1,500 bytes,-Indicates smaller)

4. By Time:

Find/-Amin n last n minutes

Find/-atime n last n days

Find/-Cmin n last n minutes change status

Find/-ctime n changes the status in the last n days

5. Others:

Find/-empty blank file, blank folder, folder without subdirectories

Find/-false find files that are always wrong in the system

Find/-fstype type: Find the file that exists in the specified file system. For example, if the type is ext2

Find/-gid N group ID n files

Find/-group gname group file named gname

Find/-depth n preferentially searches for file content in a specified directory at a Layer

Find/-maxdepth levels search in a hierarchical directory in descending Mode

6. Logic

-And and-or conditions or

7. Search for strings

Find.-Name '*. html'-exec grep 'mailto :'{}