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chattr is the command in Linux that allows a user to set certain attributes of a file. lsattr is the command that displays the attributes of a file.. Most BSD-like systems, including macOS, have always had an analogous chflags command to set the attributes, but no command specifically meant to display them; specific options to the ls command are used instead.
In DOS systems, file directory entries include a Hidden file attribute which is manipulated using the attrib command. Using the command line command dir /ah displays the files with the Hidden attribute. In addition, there is a System file attribute that can be set on a file, which also causes the file to be hidden in directory listings.
Windows PowerShell, which has become a component of Windows 7 and later, features two commands that can read and write attributes: Get-ItemProperty and Set-ItemProperty. [10] To change an attribute on a file on Windows NT, the user must have appropriate file system permissions known as Write Attributes and Write Extended Attributes. [11]
Several operating systems provided a set of modifiable file characteristics that could be accessed and changed through a low-level system call.For example, as of release MS-DOS 4.0, the first six bits of the file attribute byte indicated whether or not a file was read-only (as opposed to writeable), hidden, a system file, a volume label, a subdirectory, or if the file had been "archived" (with ...
The Windows Subsystem for Linux added in the Windows 10 Anniversary Update uses them for similar purposes, storing the Linux file mode, owner, device ID (if applicable), and file times in the extended attributes. [27] Additionally, NTFS can store arbitrary-length extended attributes in the form of alternate data streams (ADS), a type of ...
The original File Allocation Table file system has a per-file all-user read-only attribute. NTFS implemented in Microsoft Windows NT and its derivatives, use ACLs [1] to provide a complex set of permissions. OpenVMS uses a permission scheme similar to that of Unix. There are four categories (system, owner, group, and world) and four types of ...
report on file fragmentation findfs find a filesystem by label or UUID findsuper quick hacked up program to find ext2 superblocks logsave save the output of a command in a logfile lsattr list file attributes on a Linux second extended file system mke2fs used for creating ext2, ext3 and ext4 file systems resize2fs
The rm (delete file) command removes the link itself, not the target file. Likewise, the mv command moves or renames the link, not the target. The cp command has options that allow either the symbolic link or the target to be copied. Commands which read or write file contents will access the contents of the target file.