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The docker compose CLI utility allows users to run commands on multiple containers at once; for example, building images, scaling containers, running containers that were stopped, and more. [30] Commands related to image manipulation, or user-interactive options, are not relevant in Docker Compose because they address one container. [ 31 ]
unionfs-fuse is an independent project, implemented as a user space filesystem program, instead of a kernel module or patch. Like Unionfs, it supports copy-on-write and read-only or read–write branches. [10] The Plan 9 from Bell Labs operating system uses union mounts extensively to build custom namespaces per user or processes.
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.
When the medium (or media, when the filesystem is a volume filesystem as in RAID arrays) is mounted, these metadata are read by the operating system so that it can use the storage. [ 2 ] [ 3 ] Unix-like operating systems often include software and tools that assist in the mounting process and provide it new functionality.
Filesystem in Userspace (FUSE) is a software interface for Unix and Unix-like computer operating systems that lets non-privileged users create their own file systems without editing kernel code. This is achieved by running file system code in user space while the FUSE module provides only a bridge to the actual kernel interfaces.
user: the owner g: group: users who are members of the file's group o: others: users who are not the owner of the file or members of the group a: all: all three of the above, the same as ugo. (The default if no user-class-letters are specified in the maskExpression.)
A volume may have a quota assigned to it in order to limit the amount of space consumed. As needed, AFS administrators can move that volume to another server and disk location without the need to notify users; the operation can even occur while files in that volume are being used. AFS volumes can be replicated to read-only cloned copies.
tmpfs (short for Temporary File System) is a temporary file storage paradigm implemented in many Unix-like operating systems. It is intended to appear as a mounted file system, but data is stored in volatile memory instead of a persistent storage device.