Find a tool for Linux files non-find Mo genus

Yesterday I saw a group of friends discussing the find command in many groups, so today I'll talk to you about the use of the Find command in work:

First, find syntax

Usage: Find PATHNAME [-option] [-exec|-ok command] {} \;

• PATHNAME: path name to find

• [option]: selectable parameters to match

• [-EXEC|-OK command]: command operation of files to be found

• {}: File name found

• \;: backslash represents escape, semicolon represents Terminator

Second, find parameters

• -name

Search by file name

• -perm

Find by file permissions

• -user

Search by file Owner

• -group

Find by file genus Group

• -nouser

Find a file without a valid owner, that is, the genus of the file does not exist in the/etc/groups

• -nogroup

#查找无有效属组的文件, that is, the owner of the file does not exist in the/etc/groups

• -mtime (mmin)-N +n

Find files by file change time,-n refers to n days (minutes), +n refers to n days (minutes) before

• -atime (Amin)-N +n

By file access time to find files,-n refers to n days (minutes), +n refers to n days (minutes) ago

• -ctime (Cmin)-N +n

Find files by file creation time,-n refers to n days (minutes), +n refers to n days (minutes) before

• -never F1!F2

Look for change times newer than F1 but older than F2 files

• -type [b| d| c| p| l| F]

Find block devices, directories, character devices, pipelines, symbolic links, plain files

• -size N[c]

Check for files with a length of n blocks [or n bytes]

• -depth

Find files in a type of file system that are typically found in/etc/fstab

• -mount

Do not cross file system mount points when checking files

• -follow

If you encounter a symbolic link file, follow the file that the link refers to

• -prune

Ignoring a directory, if the-depth option is used at the same time, the-prune option is ignored by the Find command.

Third, find case list

1. Find files larger than 300M in the specified directory and move them to the specified path

# Find ~-size +300m# Find ~-size +300m-exec mv {} ~/sql/\;

2. Find files larger than 300M in the specified directory and delete them in two ways

# Find/-size +300m-delete# Find/-size +300m-exec rm-rf {} \;

3. Find files larger than 1G and less than 1.5G in the specified directory

# Find/-size +1g-size-1.5g

4. Two ways to find files that end in a specified directory other than. sh

# Find/-not-name ' *.sh ' # find./! -name ' *.sh '

5. Delete the backup file for the database 7 days ago

# find/bakcup/-type f-name ' *.sql '-mtime +7-exec rm-rf {} \;

6. Find files ending in. sh in the current directory, but exclude subdirectories as files in the script directory

# Find. -path './script '-prune-o-name ' *.sh '

7. Find the file that ends with. py in the current directory and modify it to. PYc

# Find/-name ' *.py '-exec mv {} ' {}c ' \;

8. Find all the files in the current directory and replace the Hello string in the file with Hello

# echo ' Hello world! ' > test01.txt# echo ' Hello teacher! ' > test02.txt# find./-type f-exec sed-i ' [Email protect Ed]@[email protected] ' {} \;

Iv. Find collocation Log Highlights

• 1. Time Search

Atime (Access Time): The duration of the visit, the last event read by the file, and the current time can be changed using the Touch command

CTime: Change time, refers to the last event of the file itself changed, change action is chmod, CHGRP, MV, etc.

Mtime (Modify time): Modification times, refers to the file content last modified event, modify the action echo redirect, VIM, etc.

• 2. Time syntax

Find PathName {-atime/-ctime/-mtime/-amin/-cmin/-mmin} [-/+]num

First parameter: Find the path name of a file

The second parameter: the preceding letters A, C, and m respectively indicate access, change, modification; time is the date, Min is the minute

The third parameter: should not be signed to indicate that it is worth, '-' within the expression, ' + ' represents the previous

• 3, Time small exercise
  

• Find files that have been visited in the current directory: Time Unit is day

# find./-atime 0

• Find files in the current directory that have been modified within 10 minutes from the moment 5 minutes ago: min

# Find./-mmin-10-min +5

• In addition an additional command :xargs

• The use of this command is similar to the exec parameter of find, such as:

# Find./-type F | Xargs chmod 755# Find./-type F | Xargs echo ' >/root/filename.log# Find/-type F | Xargs RM-RF

An article on the Web:

The event algorithm for find Mtime: http://www.oracleblog.org/study-note/how-to-calculate-find-mtime/

This article is from the "Zheng" blog, make sure to keep this source http://467754239.blog.51cto.com/4878013/1620000

Find a tool for Linux files non-find Mo genus