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Besides accessing files on a floppy disk, the PIP command in CP/M could also transfer data to and from the following "special files": CON: — console (input and output) AUX: — an auxiliary device. In CP/M 1 and 2, PIP used PUN: (paper tape punch) and RDR: (paper tape reader) instead of AUX: LST: — list output device, usually the printer
DM-MPIO in Linux consists of kernel components and user-space components. Kernel – device-mapper – block subsystem that provides layering mechanism for block devices. dm-multipath – kernel module implementing the multipath device-mapper target. User-space – multipath-tools – provides the tools to manage multipathed devices by ...
Pip's command-line interface allows the install of Python software packages by issuing a command: pip install some-package-name. Users can also remove the package by issuing a command: pip uninstall some-package-name. pip has a feature to manage full lists of packages and corresponding version numbers, possible through a "requirements" file. [14]
udev (userspace /dev) is a device manager for the Linux kernel.As the successor of devfsd and hotplug, udev primarily manages device nodes in the /dev directory. At the same time, udev also handles all user space events raised when hardware devices are added into the system or removed from it, including firmware loading as required by certain devices.
The device mapper is a framework provided by the Linux kernel for mapping physical block devices onto higher-level virtual block devices. It forms the foundation of the logical volume manager (LVM), software RAIDs and dm-crypt disk encryption, and offers additional features such as file system snapshots .
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The reserved names themselves were chosen to be compatible with "special files" handling of PIP command in CP/M. There were two kinds of devices in DOS: Block Devices (used for disk drives) and Character Devices (generally all other devices, including COM and PRN devices). [13] DOS uses device files for accessing printers and ports.
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