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In April of that year, Linux 2.1.93 added a new virtual filesystem called devpts that is normally mounted at /dev/pts. Whenever a new master/slave pair is created, a device node for the slave is created in that virtual filesystem.
sysfs provides functionality similar to the sysctl mechanism found in BSD operating systems, with the difference that sysfs is implemented as a virtual file system instead of being a purpose-built kernel mechanism, and that, in Linux, sysctl configuration parameters are made available at /proc/sys/ as part of procfs, not sysfs which is mounted ...
A virtual file system (VFS) or virtual filesystem switch is an abstract layer on top of a more concrete file system. The purpose of a VFS is to allow client applications to access different types of concrete file systems in a uniform way.
The first operation may be performed by programs such as losetup [8] in Linux, or lofiadm [9] in SunOS. As an example, if example.img is a regular file containing a file system and /home/you/dir is a Linux user's directory, the superuser (root) may mount the file on the directory by executing the following two commands:
The associated patchset, with Tejun Heo as its main author, was merged into the Linux kernel mainline in kernel version 3.14, which was released on March 30, 2014. [ 1 ] [ 2 ] Kernfs took the independent and reusable functionality of sysfs so other kernel subsystems can implement their own pseudo file systems more easily and consistently.
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.
Kernel-based Virtual Machine (KVM) is a free and open-source virtualization module in the Linux kernel that allows the kernel to function as a hypervisor. It was merged into the mainline Linux kernel in version 2.6.20, which was released on February 5, 2007. [1] KVM requires a processor with hardware virtualization extensions, such as Intel VT ...
OpenVZ (Open Virtuozzo) is an operating-system-level virtualization technology for Linux. It allows a physical server to run multiple isolated operating system instances, called containers, virtual private servers (VPSs), or virtual environments (VEs). OpenVZ is similar to Solaris Containers and LXC.