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The hosts file is one of several system facilities that assists in addressing network nodes in a computer network. It is a common part of an operating system's Internet Protocol (IP) implementation, and serves the function of translating human-friendly hostnames into numeric protocol addresses, called IP addresses, that identify and locate a host in an IP network.
fstab (after file systems table) is a system file commonly found in the directory /etc on Unix and Unix-like computer systems. In Linux, it is part of the util-linux package. The fstab file typically lists all available disk partitions and other types of file systems and data sources that may not necessarily be disk-based, and indicates how they are to be initialized or otherwise integrated ...
1) the mounted space of ramfs is theorically infinite, as ramfs will grow if needed, which can easily cause system lockup or crash for using up all available memory, or start heavy swapping to free up more memory for the ramfs. For this reason limiting the size of a ramfs area can be recommendable. 2) tmpfs is backed by the computer's swap space
Device files can be stored on a conventional general-purpose file system, or in a memory file system . Linux 2.6.32– devtmpfs with or without udev /dev: Kay Sievers, Jan Blunck, Greg Kroah-Hartman: A hybrid kernel/userspace approach of a device filesystem to provide nodes before udev runs for the first time [25] Solaris: devfs [26] /devices
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tmpfs – in-memory temporary file system (on Unix-like platforms) sysfs – a virtual file system in Linux holding information about buses, devices, firmware, filesystems, etc. debugfs – a virtual file system in Linux for accessing and controlling kernel debugging; configfs – a writable file system used to configure various kernel ...
The Sleuth Kit (free, open software) by Brian Carrier (HPA identification is currently only supported on Linux.) Note that the HPA feature can be hidden by DCO commands (documentation states only if the HPA is not in use), and can be "frozen" (until next power-down of the hard disk) or be password protected. [citation needed]
Some Linux distributions (e.g. Debian) do not have a tmpfs mounted on /tmp by default; in this case, files under /tmp will be stored in the same file system as /. And on almost all Linux distributions, a tmpfs is mounted on /run/ or /var/run/ to store temporary run-time files such as PID files and Unix domain sockets.