How to search for File command encyclopedia in Linux system

Command 1:which

Which command to find only the directory where the command is located

For example: which LS

Command 2:whereis

Whereis command to find only the directory where the command is located + Help document location

Whereis command

Command location + Help document location

Command 3:find

Find path Lookup method parameter to locate any file

There are a number of ways to find:

1. Find by file name

Find how:-name

For example: Find/t3-name file1

Note: The filename can be used with wildcard characters

* Multiple characters

? Single character

For example: Find/t3-name fil*

2. Find by File size

Find how:-size (unit data block 512 bytes, that is, 0.5kb)

+1000

-1000

=1000

For example: find/t3-name-1000

3. Find according to the owner of the file

Find how:-user

For example: Find/t3-user XHC

4. According to the group of files to find

Find how:-group

For example: Find/t3-group greenday

5. According to the last modified time to find

Find the way:-ctime,-atime,-mtime in days as the unit

How to find:-cmin,-amin,-mmin in minutes

C change refers to the file attributes, refers to permissions, groups, owners changed

A visit

M modification means that the contents of the file have been modified

Parameters:

+ More than a long time

-How much time

I don't write anything.

For example: find/t3-mmin-120

6. According to the file type to find

Find how:-type

For example: Find/t3-type D

7. According to the I node to find

Find how:-inum

For example: Find/t3-inum 14

8. Multiple conditions

-A logic and

-O Logic or

For example: Find-size +80-a-size-100

4. After the search operation

Fixed format: Find Xxx-exec command {};

For example: Find/t3-mmin-120-exec ls-l {}; Find files that have been modified within two hours and list details

Locate

UpdateDB

Grep

Example: grep FTP file name A output a file contains FTP rows