Find commands and explanations

You need to use the Find command when you need to find a file or directory in your system . It can traverse all the hierarchies under a given path to find the desired file. The Find command allows for real-time lookups, exact lookups, and it needs to traverse all levels in a given directory, all at a slightly slower pace.

1, the format of the command:

Find [OPTIONS] [ path ] [ condition ] [ processing Action ]

2, the parameters of the command:

Path: Given a specific search starting path, the default is the current directory.

Find criteria: Find criteria, can be based on file name, affiliation, file type, size, permissions, time and so on to find.

Handling actions: After the lookup is complete, you can specify the operation of the command on the result.

3. options for the command:

Find by file name

-name : Search by the given name;

-iname: Look for names that are not case-sensitive;

Find based on file dependencies

-user: According to the owner of the search;

-group: Search according to genus Group;

-uid: Search by uid ;

-gid: Search by gid ;

-nouser: Find files that are not owned by the master;

-nogroup: Find files without a group;

Find by File type:

-type Type:

F: ordinary documents;

D: Catalog file:

L: Symbolic link file;

B: block device files;

C: Character device file;

P: Pipeline file;

S: Socket file;

Find by File Size:

-size [+|-] #UNIT

Unit:k,M,G

Find by Time stamp:

In ' Days ' units:

-atime: Access Time

-mtime: Modification Time

-ctime: Change Time

In ' minutes ' units:

-amin

-mmin

-cmin

Search by permissions:

-perm [/|-]mode

Mode: precise permission matching;

/mode: Any one kind of user's permission is satisfied with the condition;

-mode: Each type of user's rights in each of the same time meet the condition is satisfied;

Condition combination:

-A: ' With ' operation, default option;

-O: ' or ' Operation;

-not \! : ' Non ';

4. Handling Actions

-print: standard output; (default)

-ls: Execute the 'ls-l' command on the search results, and output the details of the file;

-delete: Delete a found file

-fls/path/to/somefile: Saves the long format of all files found to the specified file;

-ok COMMAND {} \; : Executes on each file that is found COMMAND command, interactive operation;

-exec COMMAND {} \; : Executes on each file that is found COMMAND order;

5. Other Notes

the results found by find are given at once and passed to the following commands, but some commands cannot accept too long parameters.

For example: Find/etc-type F | ls-l this is wrong. At this point, you can use the xargs command.

Example:find/etc-type F | xargs ls-l

Xargs can read in to find information, and is distinguished by a blank or newline character. Separates the found information into multiple parameters.

6. Instance Operations

① Find all the. txt files in/home and display

find/home-type f-a-name " *.txt " -ls

② find files that start with a capital letter

Find/-type f-a-name " [a-z]* " -ls

③ find files that all users can read and write

Find/-type F-perm-007-ls

④ Find all files in/ etc directory where all users have execute permissions and other users have write permissions

find/etc/-type f-a-perm-111-a-perm-002-ls

⑤ Find files or directories that are larger than 1Min the/ etc directory andhave been modified in the last week

find/etc/-size +1m-a-mtime-7-ls

⑥ find All files or directories in the /usr/ directory that do not belong to root,bin , or Hadoop

find/usr/-not \ (-user root-o-user bin-o-user hadoop \)-ls

Find commands and explanations