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A move command that moves a directory entry to a new directory was first implemented within Multics. It can be contracted to mv. [1] Later, the mv command appeared in Version 1 Unix [2] and became part of the X/Open Portability Guide issue 2 of 1987. [3] The version of mv bundled in GNU coreutils was written by Mike Parker, David MacKenzie, and ...
srm (or Secure Remove) is a command line utility for Unix-like computer systems for secure file deletion. srm removes each specified file by overwriting, renaming, and truncating it before unlinking. This prevents other people from undeleting or recovering any information about the file from the command line.
The mkdir (make directory) command in the Unix, DOS, DR FlexOS, [1] IBM OS/2, [2] Microsoft Windows, and ReactOS [3] operating systems is used to make a new directory. It is also available in the EFI shell [4] and in the PHP scripting language. In DOS, OS/2, Windows and ReactOS, the command is often abbreviated to md.
dd is a command-line utility for Unix, Plan 9, Inferno, and Unix-like operating systems and beyond, the primary purpose of which is to convert and copy files. [1] On Unix, device drivers for hardware (such as hard disk drives) and special device files (such as /dev/zero and /dev/random) appear in the file system just like normal files; dd can also read and/or write from/to these files ...
A simplified but non-POSIX conforming form of the command, command > file 2 > & 1 is (not available in Bourne Shell prior to version 4, final release, or in the standard shell Debian Almquist shell used in Debian/Ubuntu): command & >file or command > & file. It is possible to use 2>&1 before ">" but the result is commonly misunderstood. The ...
Many government and industry standards exist for software-based overwriting that removes the data. A key factor in meeting these standards is the number of times the data is overwritten. Also, some standards require a method to verify that all the data have been removed from the entire hard drive and to view the overwrite pattern.
Note that most command-line FTP clients present their own non-standard set of commands to users. For example, GET is the common user command to download a file instead of the raw command RETR . Command
By default, the command overwrites the file three times with multiple patterns, but the number is user configurable. It has an option to do an additional final overwrite with zeroes, which may help to hide the fact that it was used. By default, shred also shreds file slack (unused space in file allocations). For example, a 5 KB file on a file ...