Find command details based on file size, name and permissions, and so on search strategy and-path and-prune detailed explanation

(1) Search by filename and inode:

    -name "file name": Supports the use of Glob
        find/etc/-name "*pas?wd*"
        *,?, [], [^]
    -iname "file name": Case-insensitive
        find/etc/-iname *pas?wd*
    -inum n  Press the inode number
        to find Find-inum
    -samefile name  the same inode number
        Find-samefile
    -links n   files
        find-links 2
    -regex "pattern": matches the entire file path string in pattern, not just the file name
    find/etc/ -regextype Posix-egrep-regex  ". */pa[sa]{2}wd"

Example:

Find-name snow.png  
• Search for files named snow.png  
find-inamesnow.png  
• Case-insensitive search named Snow.png, Snow.png, snow. PNG  and so on file     Find/-  name  "*.txt"   
• Use wildcard characters to locate files ending with. txt
find/var   –    name "*log*"    
• Find all log files in the/var directory

(2) According to the owner, the group to find:

    -user USERNAME: Find a file that is the owner of a specified user (UID)
    -group grpname: Find a file that is a group of specified groups (GID)-uid
    : Find a file that is the owner of the specified UID number
    UserID GroupID: Find files belonging to the specified GID number
    -nouser: Find files that have no owner
    -nogroup: Find files without a group
        Find-user Guanyunchang    

(3) Find according to file type:

    -type type:
    f: Normal file
    d: catalog file
    L: Symbolic Link file
    s: Socket file
    B: Block device file
    C: Character device file
    p: Pipeline file
        find /dev/-type C

(4) According to the size of the file to find:

    -size [+|-] #UNIT
        common units: K, M, G,c (byte)
    #UNIT: (#-1, #]
        such as: 6k (5k,6k]
    -#UNIT: [0,#-1]
        such as: -6k said [0,5k]
    + #UNIT: (#,∞)
        such as: +6k Express (6k,∞)

(5) According to the time stamp:

    In "Days"
       ,-atime [+|-]#,  
        #: [#,#+1]
        +#: [#+1,∞]
        -#: [0,#)-mtime-ctime
    to "minutes":
        - Amin
        -mmin
        -cmin
    find/etc/-mtime-1

(6) According to the right to find:

-perm [/|-]mode
    MODE: exact permission matching
    /mode: Any Class (U,g,o) object's permissions can be a match, or a relationship, + from the Centos7 start elimination, CENTOS6 and its previous system/+ are available.
    -mode: Each type of object must have the specified permission at the same time, and relationship
        0 is not concerned about
Find-perm 755 will match the permissions mode is exactly 755 of the file
as long as any person has write permission, Find-perm + 222 will match   when the permission is described as a combination of permissions, that is, when the 5,6,7, the relationship between the permissions or
only when everyone has write permission, find-perm-222 will match  when the permission is described as a combination of permissions, that is, 5,6,7, The relationship between the rights and the
find-perm-002 will only match if other people (other) have write permission

Handling Actions

    -print: Default processing action, displaying to screen
    -ls: Similar to performing a "ls-l" command on a found file
    - Delete: Remove the found file
        find-size +6k-delete
    -fls File: Long format information for all files found is saved to the specified file
    -ok-exec   OK Interactive, exec run directly
    find- Name "*.tmp"-ok rm-f {} \;
    find-type f-name "*.sh"-exec chmod a+x {} \;
    find-name "*.conf"-exec cp-i {} {}.bak \;


Because many commands do not support piping | To pass parameters, and this is necessary in daily work, there is a xargs command
Xargs used to produce parameters for a command, Xargs can read stdin data, and spaces or carriage returns to stdin Data separation becomes arguments
Note: file names or other meaning nouns contain spaces conditions
Some commands cannot accept too many parameters, command execution may fail, Xargs can resolve
Example:
     LS |xargs   rm
    find/sbin-perm +700 |ls-l       This command is wrong
    find/sbin-perm +7000 | xargs ls–l
Find and Xargs format: Find | xargs COMMAND

Comprehensive Case: example: (Two methods)
Find files in the/tmp directory where the owner is not root and the filename does not start with F
find/tmp \ (-not-userroot-a-not-name ' f* ')-ls
Find/tmp-not \ (-userroot-o-name ' f* ') –ls
Example: (primarily for handling cases other than this directory)
Find files for all other. conf suffixes under/etc/except/ETC/SANE.D directory
find/etc/-path '/etc/sane.d '-a-prune-o-name ' *.conf '

Add execute permissions to all files ending with. Sh in the current directory

Find-type f-name "*.sh"-exec chmod +x {} \;

Practice:
1, look for all files
    find/var-user root-group Mail
2, Find//var directory under the owner of Root and group mail All files in the Var directory that do not belong to root, LP, GDM
    find/var-not \ (-user root-o-user lp-o-user GDM \)
3, find the/var directory most Its contents have been modified in the last week, and the owner is not root or postfix file
    find/var-mtime-7-not \ (-user root-o-user postfix \)
4. Find the file
    find/-type f-atime-7-nouser-nogroup

Job:
1, find/et on the current system that has no owner or group, and has been accessed in the last week All files in the C directory that are greater than 1M and of type normal files
    find/etc/-size +1m-type F
2, find files in/etc directory where all users do not have write permissions
    find/etc-not-perm/222
3, find files in/etc directory where at least one type of user does not have Execute permissions
    find/etc-not-perm-111
4, Find/ ETC/INIT.D directory, all users have execute permissions, and other users have write permissions to the file
    find/etc/init.d/-perm-113