Shell script find command

The find command is used for searching. It has powerful functions in the following format:

 
Find pathname-options [-print-Exec-OK...]
 

 
Pathname: directory path searched by the find command. For example, use "." To represent the current directory, and use "/" to represent the root directory of the system. -Print: The find command outputs matching files to the standard output. -Exec: The find command executes the shell command given by this parameter on the matching file. The corresponding command is in the form of 'command' {}\;. Note the space between {} And. -OK: The Role of-exec is the same, but the shell command given by this parameter is executed in a safer mode. A prompt is displayed before each command is executed, let the user determine whether to execute.
 

There are many command options, which are commonly used as follows:

-Name: searches for files by file name. -Perm searches for files based on the file permissions. -Prune uses this option to make the find command not to be searched in the specified directory. If the-depth option is used at the same time,-prune will be ignored by the find command. -The user searches for files based on the file owner. -The group searches for files based on the group to which the files belong. -Mtime-N + N: Find the file based on the file change time.-N indicates that the file change time is earlier than N days, and + N indicates that the file change time is earlier than N days. The find command also has the-atime and-ctime options, but they both have the-M time options. -Nogroup: Find the file with no valid group, that is, the group to which the file belongs does not exist in/etc/groups. -Nouser: Find the file without a valid owner, that is, the owner of the file does not exist in/etc/passwd. -Newer file1! File2 searches for files whose change time is newer than file1 but older than file2. -Type: search for a certain type of files, such as B-block device files. D-directory. C-character device file. P-MPs queue file. L-Symbolic Link file. F-common file. -Size N: [c] searches for files with a length of N blocks. If a file contains C, the file length is measured in bytes. -Depth: when searching for a file, first find the file in the current directory and then find it in its subdirectory. -Fstype: searches for files in a certain type of file system. These file system types can usually be found in the configuration file/etc/fstab, this configuration file contains information about the file system in the system. -Mount: the mount point of the file system is not crossed during file search. -Follow: If the find command encounters a symbolic link file, it will trace the file to which the link points. -Cpio: Use the cpio command to back up the files to the tape device. -Amin n  Find the files accessed in the last n minutes of the system    -Atime n  Find the last n * 24 hours of files in the system    -Cmin n Find the file whose status is changed in the last n minutes in the system    -Ctime n  Find the file whose status is changed in the last n * 24 hours in the system.    -Mmin n  Find the file whose data is changed in the last n minutes in the system    -Mtime n  Find the file whose data has been changed for the last n * 24 hours in the system. 

A small example of the find command shell script is as follows ):

 
#! /Bin/shfor afile in 'Find. /-name "*" '; do # echo $ afile; if [-F "$ afile"]; then wordnum = 'cat $ afile | grep $1 | WC-l'; if ["$ wordnum"-ge 2]; Then ECHO $ afile; FI fidone
 

If the shell script is named find_word.sh and the current user is granted executable permissions, run the following command:

[@ 131.169 test] # find_word.sh Ni
 

Search for files containing Ni