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File locking is a mechanism that restricts access to a computer file, or to a region of a file, by allowing only one user or process to modify or delete it at a specific time, and preventing reading of the file while it's being modified or deleted.
Common file attributes supported by many common Linux file systems Attribute lsattr flag chattr option Semantics and rationale No atime updates A +A,-A: atime record is not modified when file is read/accessed. Append-only a +a,-a: Writing to file only allowed in append mode. Immutable i +i,-i
For XLSX files that can be opened but not edited, there is another attack. As the file format is a group of XML files within a ZIP; unzipping, editing, and replacing the workbook.xml file (and/or the individual worksheet XML files) with identical copies in which the unknown key and salt are replaced with a known pair or removed altogether ...
The read permission grants the ability to read a file. When set for a directory, this permission grants the ability to read the names of files in the directory, but not to find out any further information about them such as contents, file type, size, ownership, permissions. The write permission grants the ability to modify a file. When set for ...
Through packet writing, which uses the Universal Disk Format (UDF) file system, these discs often use a file system that permits additional files, and even revised versions of a file by the same name, to be recorded in a different region of the disc. To the user, the disc appears to allow additions and revisions until all the disk space is used.
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.doc (an abbreviation of "document") is a filename extension used for word processing documents stored on Microsoft's proprietary Microsoft Word Binary File Format; it was the primary format for Microsoft Word until the 2007 version replaced it with Office Open XML.docx files. [4] Microsoft has used the extension since 1983.
By default, both the Trash and Spam folders empty automatically to keep your account tidy. These settings are set systemically and can't be changed. • Trash deletion frequency - Trash is deleted after 7 days. • Spam deletion frequency - Spam is deleted after 30 days.