Linux Basic Tutorial Linux system bulk Delete files with empty file Removal command introduction

Linux Delete file or directory command RM (remove)below:

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Feature Description: Delete files or directories.

Syntax:rm[-dfirv][--help][--version][ file or directory ... ]

Additional note: The Execute RM instruction can delete the file or directory, if you want to delete the directory must add the parameter "-R", otherwise the default will only delete the file.

Parameters

　　- D or --directory Delete the hard connection data for the directory that you want to delete directly by deleting the directory by 0.

　　- F or --force forces the deletion of files or directories.

　　 -I or --interactive to ask the user before deleting both files or directories.

　　- R or- R or --recursive recursively handles all files and subdirectories under the specified directory.

　　- v or --verbose shows the instruction execution process.

　　--help online Help.

　　How to bulk delete empty files ( Files of size equal to 0 ) under Linux

The code is as follows

　　Find. -name "*"-type f-size 0c | Xargs-n 1 rm-f

You can also delete a file of the specified size, as long as you modify the corresponding -size parameter, for example:

The code is as follows

　　Find. -name "*"-type f-size 1024c | Xargs-n 1 rm-f

is to delete files of 1k size. ( but be careful not to use -size 1k, this gets to occupy space 1k, not file size 1k ).

If you just delete the folder or the name of the connection, you can change the -type parameters, specific details see man find

Delete N days ago File

　　LINUX Bulk Delete files by Time ( delete N days ago file )

The code is as follows

　　find/opt/oracle/admin/ccxe/bdump/-mtime +10-name "* *"-exec RM-RF {};

　　/opt/oracle/admin/ccxe/bdump/: Any directory that you want to clean up

　　-mtime: Standard statement notation

　　+10: Find the file of ten days ago, where the number represents the number of days ,+30 means to find the file of the day before

　　"*. *": The type of data you want to find,"*.jpg" means looking for all files with the extension jpg ,"*" means finding all files

　　-exec: fixed notation

　　RM-RF: Forcibly deleting files, including directories

　　{} ;  : fixed notation, pair of curly braces + space +/+;

Delete Files completely

Sometimes we have to completely delete some files, you can use the Shred command to implement,shred is a part of the coreutils , so Linux basically will have this command.

　　Shred How to delete files completely :

The code is as follows

　　$ shred-u File

　　Shred will overwrite the node and data block where the file resides with some random content, and delete the file (-u parameter ).

If you want to clear a bit more thoroughly you can add the- z parameter, which means to fill with random data, and then fill it with 0 .

The code is as follows

　　$ shred-u-Z File

In addition Shred can also clear the entire partition or disk, such as to completely clear the contents of the /DEV/SDB1 partition can be :

　　$ SHRED/DEV/SDB1 ( note Do not add- u parameter )

　　Detailed parameters of the shred :

　　-F,--force Change permissions allow Write ( if necessary )

　　-N ,--iterations=n rewrite n times, default is 3 times

　　--random-source=file reading data from a specified file

　　- S,--size=n the file to a fixed size ( suffixes such as K,M,C , etc. can be used )

　　-U,--remove truncate and remove files after rewriting

　　-V,--verbose Show Progress

　　-Z,--zero-add with 0 coverage Data

　　Help Display Help

　　–version displaying version information

Linux Basic Tutorial Linux system bulk Delete files with empty file Removal command introduction