File Lookup command under Linux--find

(The document has three "time": http://zhweizhi.blog.51cto.com/10800691/1775447)

Overview

The Find command searches for a file of the specified name by traversing the hard disk, so its efficiency is much slower than the Whereis instructions.

The following describes the use of the Find command:

The command format is:

Find pathname [option] [action]

Pathname (PATH)

Where pathname is the path to find (. Indicates the current path,/represents the root path)

Such as

Find. -name test.c means looking for a file named TEST.c under the current path Find/-name test.c means looking for a file named TEST.c under the system root path

Option (parameter)

The following categories describe commonly used parameters:

-name: Find by file name

Such as:

Find. -name hello.c means looking for a file named hello.c under the current path

-perm: Search by file permissions

The root privilege here is 0.

Such as:

Find. -perm 755 chmod-r 777 means to find all files with permission 755 in the current directory and set to 777

-user according to the owner of the file to find

-group Search by the same group as the file

-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 find changes time than file File1 new, but file2 older files than files.

-type finding 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.

For example:

Find/root-size-5557c-size +5555c-exec ls-ld {} \; A file that looks for a file length less than 5557 greater than 5555 (that is, a file of length 5556)

-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.

-mtime-n +n (Mtime indicates the number of days, in addition to such as-mmin for minutes, the other two times the same)

-ctime-n +n

-atime-n +n

: Find files According to file change time (three kinds)

Such as:

Find/root-mmin 5 Find the directory accessed in the last 5 minutes of the system

Action (Action)

Once the lookup is complete, you can perform the specified action immediately, as follows:

Find. -size-11c-size +9c-delete Find files with file size of 10k and delete

File Lookup command under Linux--find