File Attributes; Root user cannot even delete this file after setting this permission.
One of the reason linux is taking up the corporate world is due to it level of security. There might be a sensitive file on your system you want no one to mess with. Like deleting, renaming or modifying the content of the file. As a system Administrator you are to make sure that file is not mishandled by other users. A user may have full permission(rwx) on the file but when an attribute is set on that file not even the root user can modify it. chattr is the command for setting attribute on files and directories. It uses flags(A, a, S, i, u, d, t, j) and operators(=, +, -). Command syntax chattr [operator][flag] filename To list or show the attribute of a file, we use lsattr Below is the descriptions of some attributes and it associate flags Attribute Flag Description No atime updates A file atime record is not modified This avoids a certain amount of disk I/O operation append only a You can only append text to the file This attribute is very useful as a means of keeping r
