Shell Programming Basics-find Command

Examples of find common usages in Linux
Find Path-option [-print] [-exec-ok command] {} \;

The parameters of the Find command;
The directory path that the Path:find command looks for. For example, use. To represent the current directory, and/to represent the system root directory.
The-print:find command outputs the matched file to standard output.
The-exec:find command executes the shell command given by the parameter to the matching file. The corresponding command is in the form of ' command ' {} \;, note the space between {} and \;
-ok: The same as-exec, except that the shell command given by the parameter is executed in a more secure mode, prompting the user to determine whether to execute before executing each command.
#-print output of the found file to standard output
#-exec command {} \; -the command operation for the file to be found, with spaces between {} and \;
#-ok and-exec are the same, except to consult the user before operation
Example: Find. -name. SVN | Xargs RM-RF

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-name filename #查找名为filename的文件
-perm #按执行权限来查找, read and write executable
-user username #按文件属主来查找
-group GroupName #按组来查找
-mtime-n +n #按文件更改 (Modify) time to find files, (detailed below)
-atime-n +n #按文件访问 (Access) time to check
-ctime-n +n #按文件创建 (Create) time to find files
-nogroup #查无有效属组的文件 that the genus of the file does not exist in the/etc/groups
-nouser #查无有效属主的文件, that is, the owner of the file does not exist in the/etc/passwd
-ctime-n +n #按文件创建时间来查找文件
-newer F1!F2 #查更改时间比f1新但比f2旧的文件
-type b/d/c/p/l/f #查是块设备, directories, character devices, pipelines, symbolic links, plain files
-size N[c] #查长度为n块 [or N-byte] files
-depth # before working on a directory, first process the child content under the directory
-fstype #find files located in a type of file system that are typically found in the configuration file/etc/fstab, which contains information about the file system in the system.
-mount #查文件时不跨越文件系统mount点
-follow #如果遇到符号链接文件, just follow the file that the link refers to
-cpio # Copy files to the archive package
-prune #忽略某个目录

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$find ~-name "*.txt"-print #在 $HOME. txt file and displays
$find. -name "*.txt"-print
$find. -name "[a-z]*"-print #查以大写字母开头的文件
$find/etc-name "host*"-print #查以host开头的文件
$find. -name "[A-z][a-z][0–9][0–9].txt"-print #查以两个小写字母和两个数字开头的txt文件

$find. -perm 755-print
$find.   　　　　　　　　-perm-007-exec ls-l {} \; #查所有用户都可读写执行的文件同-perm 777

$find. -type D-print #查找类型为目录的文件
$find.   ! -type D-print
$find. -type L-print

$find. -size +1000000c-print #查长度大于1Mb的文件
$find. -size 100c-print # Check for files of length 100c
$find. -size +10-print #查长度超过10块的文件 (1 block = 512 bytes)


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Find-name april* Find files starting with April in the current directory
Find-name april* >>file finds files starting with April in the current directory and outputs the results to file
Find-name ap*-o-name may* Find files that start with an AP or may (-O or OR)
Find/mnt-name tom.txt-ftype vfat to find files with the name Tom.txt and file system type VFAT under/MNT
Find/mnt-name T.txt! -ftype VFAT under/mnt to find files with the name Tom.txt and file system type not VFAT
Find/tmp-name wa*-type L Find a file with a type of symbolic link at/tmp that begins with the name WA
Find/home-mtime-2 in/home search for files that have changed in the last two days
find/home-atime-1 checked files accessed within 1 days
Find/home-mmin +60 The files that were changed 60 minutes ago at/home
Find/home-amin +30 Check the files that were accessed last 30 minutes ago
Find/home-newer Tmp.txt in/home check update time than tmp.txt files or directories
Find/home-anewer tmp.txt a file or directory that is accessed more than tmp.txt near/home
Find/home-used-2 lists files or directories that have been accessed within 2nd after the file or directory has been altered
Find/home-user CNSCN lists files or directories in the/home directory that belong to the user Cnscn
Find/home-uid +501 lists files or directories with a user's ID greater than 501 in the/home directory
Find/home-group CNSCN list files or directories in/home with group CNSCN
Find/home-gid 501 lists files or directories with a group ID of 501 in/home
Find/home-nouser lists files or directories in/home that are not local users
Find/home-nogroup lists files or directories in/home that are not part of a local group
Find/home-name tmp.txt-maxdepth 4 Lists the Tmp.txt in/home with a depth of up to 3 layers
Find/home-name tmp.txt-mindepth 3, starting from the 2nd floor.
Find/home-empty finding a file size of 0 or an empty directory
Find/home-size +512k files larger than 512k
find/home-size-512k files less than 512k
Find/home-links +2 Check hard connections more than 2 files or directories
Find/home-perm 700 Check the file or directory with permission 700
Find/tmp-name tmp.txt-exec Cat {} \;
Find/tmp-name tmp.txt-ok rm {} \;

Find/-amin-10 # finds files accessed in the last 10 minutes of the system
Find/-atime-2 # finds files accessed in the last 48 hours of the system
Find/-empty # finds files or folders that are empty in the system
Find/-group Cat # finds files that belong to Groupcat in the system
Find/-mmin-5 # finds files that have been modified in the last 5 minutes of the system
Find/-mtime-1 #查找在系统中最后24小时里修改过的文件
Find/-nouser #查找在系统中属于作废用户的文件
Find/-user Fred #查找在系统中属于FRED这个用户的文件

Check all the normal files in the current directory
# Find. -type f-exec ls-l {} \;
-rw-r–r–1 root root 34928 2003-02-25./conf/httpd.conf
-rw-r–r–1 root root 12959 2003-02-25./conf/magic
-rw-r–r–1 root root 2003-02-25./conf.d/readme
Note: Check all the normal files in the current directory and use the LS-L command in the-e x E C option to list them

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In the/L o G S directory, look for files that change time before 5th and delete them:
Find Logs-type f-mtime +5-exec-ok rm {} \;

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Query for files modified on the day
Find./-mtime-1-type f-exec ls-l {} \;

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Query the file and ask if you want to display
Find./-mtime-1-type f-ok ls-l {} \;

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Query and give it to awk to handle it.
W.H.O. | awk ' {print ' \ t '

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File system disk Conditions
Df-k |   awk ' {print '} ' | Grep-v ' None '

1) Find all the *.h in/tmp and look for "syscall_vector" in these files, and finally print out all the filenames that contain "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) Delete files by name

Find/-name filename-exec rm-rf {} \;
Find/-name filename-ok rm-rf {} \;

3) For example, to find files larger than 3M on the disk:
Find. -size +3000k-exec ls-ld {};

4) Copy the find out to another place.
Find *.c-exec cp ' {} '/tmp '; '

If you have special files, you can use Cpio, or you can use this syntax:
Find Dir-name Filename-print | CPIO-PDV Newdir

5) Look for files changed at 2004-11-30 16:36:37
# a= ' Find/-name ' *php ' | Ls-l–full-time $A 2>/dev/null | grep "2004-11-30 16:36:37"

Shell Programming Basics-find Command