Linux command: find

find

1. The role of
the role of the find command is to search for files in a directory, its permissions for all users.

2. Format

find [path][options][expression]

path specifies the directory path from here to find the file system down the directory tree. It is a list of paths separated from each other by a space, if you do not write path, it defaults to the current directory.

3. The main parameters

[options] parameters:
the -depth: using deep-level discovery process mode, first search the contents of files in a specified directory level.
-Maxdepth levels: the first level represents up to find the level of subdirectories start directory. level is a non-negative, if the level is 0, then represent only look in the current directory.
-Mindepth levels: the first level represents the least level of subdirectories to find the beginning of the directory.
Find not in other file systems (such as Msdos, Vfat etc.) directories and files: -mount.
-Version: print version.

[expression] is a matching expression, a find command accepts an expression, all the operations of the find command is for expression. Its parameters are many, here only some of the commonly used parameters.
-Name: supports wildcards * and?.
-Atime n: search've read in the last n days file.
-Ctime n: search modified in the last n days file.
-Group grpoupname: search all group grpoupname file.
-User User name: to search for all files is owned by the username (ID or name) of the file.
-Size n: n is the size of a file search block files.
-Print: output search results, and print.

4. application skills

find command to find files in several ways:

(1) based on the file name lookup
for example, we want to find a file name is lilo.conf file, you can use the following command:

find / －name lilo.conf

"/" Means to search the entire hard disk after the find command.

(2) quickly find files

Find the file filename will encounter a real problem according to, it is to take a very long period of time, especially for large Linux file systems and large-capacity hard disk when the file is placed deep subdirectory. If we know that this file is stored in a directory, as long as this directory will save a lot of time looking down. For example smb.conf file from its file extension ".conf" This is based on a configuration file, then it should be in the / etc directory, then you can use the following commands:

find /etc －name smb.conf

In this way, use the "Find Files Fast" mode can shorten the time.

(3) Find Method according to part of the file name

Sometimes we just know that a file containing abvd these four words, then you want to find all files that contain the system has four characters you can enter the following command:

find / －name '*abvd*'

After entering this command, Linux system will search for all files containing abvd these four characters in the / directory. Where * is a wildcard, such as abvdrmyz and other eligible files can be displayed.

(4) using a hybrid to find ways to find files

You can use the find command to find a method of mixing, for example, we want to find greater than 500,000 bytes in the / etc directory and modify a file within 24 hours, you can use -and (and) Find the two parameters are linked Find a way to be combined into a hybrid.

find /etc -size +500000c -and -mtime +1