delete file in hadoop

/** * Func:delete_file * Params: $file file name * Multiple criteria to determine the deletion of files * by bbs.it-home.org */ function Delete_file ($file) { if (file_exists ($file)) { $delete = chmod ($

Introduction:In this article, you'll learn about two points on file operation. 1. How to delete the specified line of a file. 2.How to replace the specified line of a file.Yesterday someone asked me how to delete the specified row in the file (under the console). I think thi

This article explains the basic operations of Java files, including Java to create files and folders, Java delete files, Java to get all the files of the specified directory, Java to determine whether the specified path is a directory, and the Java search for the entire contents of the specified directory. Take a look at the example below.Create a fileThe two constants of File (File.separator, File.pathsepa

[Python] python3 file operations: input files from the keyboard, open and close files, read and write files, rename and delete files, etc,1. Input from the keyboard Python 2 has two built-in functions used to read data from standard input, which are by default from the keyboard. These two functions are: input () and raw_input ().In Python 3, The raw_input () function is not recommended. All input () functio

Delete the directory directly, if it is empty directory can be deleted, if not empty directory, this time can only delete the files in the directory, and then delete the Directory. I encapsulated a delete function and called the function directly. Like can be directly used, the code is gbk, use time to pay attention to

How to delete Temporary Folder location and temporary file in Win10 system, win10 folder The location of temporary folders in Windows is slightly different depending on the system. There are three temporary folders in Windows 10: ① Windows Temporary Folder; ② user account temporary folder; ③ temporary IE folder. How can I find the positions of these three folders in the system disk and

and B subdirectory under the A directory, which is called curly braces to provide user-friendly operation.Mkdir-p/root/a/{b,c}_{d,f} This command is to create a directory under the A directory b_d b_f c_d c_f Why do you know, do not explain heheNanoText EditorExample: Nano name creates a file named name in the current directory to open a text editor to edit the file,Enter the inside after you can enter cha

* filepath2 = [documentsdirectoryStringbyappendingpathcomPonent: @ "file2.txt"];// Determine whether to moveIf ([filemgr moveitematpath: filepath topath: filepath2 error: error]! = Yes)Nslog (@ "unable to move file: % @", [error localizeddescription]);// Display the contents of the file directoryNslog (@ "documentsdirectory: % @",[Filemgr contentsofdirectoryatpatH: documentsdirectoryerror: error]);After

1 package Io. fileop; 2 Import Java. io. *; 3/** 4 * delete a file or delete a directory 5 * @ author www.tfgzs.net 6 */7 public class Delete {8 9 public static void main (string [] ARGs) {10 string pathstring = "E:/360 downloads/123456.txt"; // file path 11 12 if (

This article is generated in the writing of personal site backup script when you see, stay for referenceProblem scenario: Because my company has too many servers, the daily backup log files that I've created accumulate over the long haul. And do not need to keep so much, according to company requirements only need to retain one weeks. 1. What is the way to automatically delete the *.log files that were backed up 7 days ago? 2. Too many servers, it is

1.CP (copy)CP [-ADFILPRSU] source file destination fileParameter explanation:-I: Ask before overwriting the file;-A: The properties of the file are not changed after copying (including permissions, owners and groups);-R: Continuous recursive replication, is to replicate the directory;-S: Copy to link file (color is lig

Linux Delete Folder command Linux Delete directory is very simple, many people are still accustomed to using rmdir, but once the directory is not empty, into deep distress, now use the RM-RF command.Direct RM is OK, but add two parameters-rf namely: RM-RF directory Name Delete directory, file rm (remove) Feature Des

Create a Directorymkdir file nameMkdir/var/www/testCP Copy CommandCP command copies files from one location to another. If the destination file exists, the file will be overwritten, and if the destination directory exists, the file will be copied to that directory (the directory will not be replicated).Grammar:Syntax i