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The Linux Find command searches the directory structure for files and performs the specified actions. The Linux Find command provides quite a lot of search criteria and is powerful. Because find has powerful features, it has a lot of options, most of which are worth taking the time to look at. Even if the system contains a network file system (NFS), the Find command works equally well in the file system as long as you have the appropriate permissions. When running a very resource-intensive find command, many people tend to put it in the background because it can take a long time to traverse a large file system (this refers to a file system with more than 30G bytes).
1. Command format:
Find Pathname-options [-print-exec-ok ...]
2. Command function:
Used to locate files in the file tree and to make corresponding processing
3. Command parameters:
The directory path that the Pathname: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.
4. Command options:
-name finds files by file name.
-perm to find files according to file permissions.
-prune Use this option to have the Find command not be found in the currently specified directory, and if you use the-depth option at the same time,-prune will be ignored by the Find command.
-user Search for files according to the owner of the file.
-group finds files according to the group to which the files belong.
-mtime-n +n The file changes time to find the file,-n means that the file change time is now less than n days, + n means that the file change time is now N days ago. The Find command also has the-atime and-ctime options, but they both and the-m time option.
-nogroup finds a file that does not have a valid owning group, that is, the group to which the file belongs does not exist in/etc/groups.
-nouser finds a file without a valid owner, that is, the owner of the file does not exist in the/etc/passwd.
-newer file1! File2 look for a file that changes time than the file File1 new but older than the file file2.
-type find a file of a certain type, such as:
B-block device files.
D-Directory.
C-character device file.
P-Pipeline file.
L-Symbolic link file.
F-Normal file.
-size N:[c] finds files with a file length of n blocks, with C indicating the length of the file in bytes. -depth: When looking for a file, first find the file in the current directory, and then look in its subdirectories.
-fstype: Find files located in a file system of a certain type, these file system types can usually be found in the configuration file/etc/fstab, which contains information about the file system in this system.
-mount: Does not cross the file system mount point when locating files.
-follow: If the find command encounters a symbolic link file, it tracks to the file that the link points to.
-cpio: Use the cpio command for matching files to back up these files to the tape device.
In addition, the following three differences:
-amin N Find the last n minutes of files accessed in the system
-atime N Find the last n*24 hour Access file in the system
-cmin n Find files in the last n minutes of the system changed file status
-ctime n Find files that have changed file status in the last n*24 hours of the system
-mmin n Find files that have changed file data in the last N minutes of the system
-mtime n Find files that have changed file data for the last n*24 hours in the system
5. Usage examples:
Example 1: Finding files that have been modified within a specified time
Command:
Find-atime-2
Output:
[Email protected] ~]# Find-atime-2.. /logs/Monitor. /. BASHRC. /. Bash_profile. /.bash_history
Description
Find files that have been modified within 48 hours
Example 2: Search by keyword
Command:
Find. -name "*.log"
Output:
[[email protected] test]# find. -name"*.log" ./Log_link.log./Log2014.log./test4/log3-2. Log./test4/log3-3. Log./test4/log3-1. Log./Log2013.log./Log2012.log./Log.log./test5/log5-2. Log./test5/log5-3. Log./test5/Log.log./test5/log5-1. Log./test5/test3/log3-2. Log./test5/test3/log3-3. Log./test5/test3/log3-1. Log./test3/log3-2. Log./test3/log3-3. Log./test3/log3-1. log
Description
Finds files that end with. Log in the current directory. ". " Represents the current directory
Example 3: Find files by directory or file permissions
Command:
find/opt/soft/test/-perm 777
Output:
777/opt/soft/test/log_link.log/opt/soft/test/test4/opt/soft/test/test5/test3 /opt/soft/test/test3
Description
Find files with permission 777 under the/opt/soft/test/directory
Example 4: Find by Type
Command:
Find. -type f-name "*.log"
Output:
[[email protected] test]# find. -type F-name"*.log"./Log2014.log./test4/log3-2. Log./test4/log3-3. Log./test4/log3-1. Log./Log2013.log./Log2012.log./Log.log./test5/log5-2. Log./test5/log5-3. Log./test5/Log.log./test5/log5-1. Log./test5/test3/log3-2. Log./test5/test3/log3-3. Log./test5/test3/log3-1. Log./test3/log3-2. Log./test3/log3-3. Log./test3/log3-1. Log[[email protected] test]#
Description
Find common files that end with a. Log in a directory
Example 5: Find and sort all current directories
Command:
Find. -type D | Sort
Output:
[[email protected] test]# find. -type D | Sort: /SCF
. /scf/bin. /scf/Doc/scf/lib. /scf/service. /scf/service/Deploy. /scf/service/deploy/info. /scf/service/deploy/product. /test3. /test4. /test5. /test5/test3[[email protected] test]#
Example 6: Find files by size
Command:
Find. -size +1000c-print
Output:
[Email protected] test]# find-size +1000c-print : /test4. /SCF. /scf/lib. /scf/service. /scf/service/Deploy. /scf/service/deploy/product. /scf/service/deploy/info. /scf/Doc./scf/bin. /Log2012.log. /test5. /test5/test3. /Test3[[email protected] test]#
Description
Find files with current directory larger than 1K
One Linux command per day (file operation): "Reprint" Find command overview