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File deletion is the removal of a file from a computer's file system. All operating systems include commands for deleting files (rm on Unix and Linux, [1] era in CP/M and DR-DOS, del/erase in MS-DOS/PC DOS, DR-DOS, Microsoft Windows etc.). File managers also provide a convenient way of deleting files. Files may be deleted one-by-one, or a whole ...
This option provides a systematic compression scheme. Infrequently accessed files are compressed to free up disk space while leaving the frequently used files uncompressed for faster read/write access times. If after file compression, a user wishes to access a compressed file, the access times may be increased and vary from system to system.
When a file is "deleted" using a FAT file system, the directory entry remains almost unchanged except for the first character of the file name, preserving most of the "deleted" file's name, along with its time stamp, file length and — most importantly — its physical location on the disk.
Choose carefully between group nominations (several file in the same deletion discussion) or multiple individual nominations. The former are more efficient for groups of cases that fall under exactly the same criteria, the latter for groups of cases that are different enough to require individual scrutiny.
Tech expert Kurt “CyberGuy" Knutsson reveals ways to restore accidentally deleted text messages on your Android phone.
Permanent data erasure goes beyond basic file deletion commands, which only remove direct pointers to the data disk sectors and make the data recovery possible with common software tools. Unlike degaussing and physical destruction, which render the storage media unusable, data erasure removes all information while leaving the disk operable.