Linux-find Common instruction usage examples

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 a strong DA feature, it has a lot of options, and most of the options 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, and you only have the appropriate permissions. When running a find command that consumes resources, many people tend to put it in the background because it can take a lot of 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 make corresponding processing (possibly accessing the disk)

3. Command arguments: The directory path that the Pathname:find command looks for. For example, use. To represent the current directory, with/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.
If you want to print files other than test.c in the current directory (/home/admin/code):

#按文件属主来查找

#按所属组来查找

-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.

-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 are all the same as the-m time option.
View files that have been changed in the last two days

-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 catalog and then look it up in its next directory.

-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.

1. In the/code directory, look for files that changed 5 days ago and delete them:

2. Linux using the Find command to find File size xx file method
For example: A file of 5556 bytes can be written like this
Find/root-size-5557c-size +5555c-exec ls-ld {} \;

Find/root-size-500k-size +50k-exec ls-ld {} \;

Linux-find Common instruction usage examples