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Encyclopedia > Chattr

chattr is a UNIX program that allows a user to set certain attributes to a file. Mostly chattr is used to make files immutable so that password files and certain system files cannot be erased during software upgrades. Image File history File links This is a lossless scalable vector image. ... Filiation of Unix and Unix-like systems Unix (officially trademarked as UNIX®, sometimes also written as or ® with small caps) is a computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs including Ken Thompson, Dennis Ritchie and Douglas McIlroy. ...


The form of the chattr command is:

chattr [-RV] [-+=AacDdijsSu] [-v version] files

where

-R is to recurse all subdirectories
+i is to set the immutable bit to prevent even root from erasing or changing the contents a file (the superuser can't erase or write on the file, but he or she can set or unset the 'i' attribute).

On modern BSD systems (including Mac OS X) the equivalent command is chflags. BSD redirects here; for other uses see BSD (disambiguation). ... Mac OS X (pronounced ) is a line of graphical operating systems developed, marketed, and sold by Apple Inc. ...


See also

  • lsattr view file attributes
  • chown change file/directory ownership
  • chmod change Unix access control attributes
  • cacls MS-Windows NT filesystem ACL control utility
  • attrib available on DOS and other systems

chown is a Unix command used to change the recorded owner of a computer file. ... The chmod command (abbreviated from change mode) is a shell command in Unix and Unix-like environments. ... This article or section includes a list of works cited or a list of external links, but its sources remain unclear because it lacks in-text citations. ... This article does not cite any references or sources. ...

External links

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