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Mtab
The mtab (contraction of '' mounted file systems table'') file is a system information file, commonly found on Unix-like systems. Overview This file lists all currently mounted filesystems along with their initialization options. mtab has a lot in common with fstab, the distinction being that the latter is a configuration file listing which available filesystems should be mounted on which mount points at boot time, whereas the former lists currently mounted ones, which can include manually mounted ones not listed in fstab. Therefore, mtab is usually in a format similar to that of fstab. Most of the time it is possible to directly use lines from mtab in fstab. The file commonly resides in /etc/mtab. In some systems it is a symlink to /proc/mounts. Example Sample mtab contents: /dev/sdb1 / ext3 rw,relatime,errors=remount-ro 0 0 proc /proc proc rw,noexec,nosuid,nodev 0 0 /sys /sys sysfs rw,noexec,nosuid,nodev 0 0 varrun /var/run tmpfs rw,noexec,nosuid,nodev,mode=0755 0 0 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
File System
In computing, file system or filesystem (often abbreviated to fs) is a method and data structure that the operating system uses to control how data is stored and retrieved. Without a file system, data placed in a storage medium would be one large body of data with no way to tell where one piece of data stopped and the next began, or where any piece of data was located when it was time to retrieve it. By separating the data into pieces and giving each piece a name, the data are easily isolated and identified. Taking its name from the way a paper-based data management system is named, each group of data is called a "file". The structure and logic rules used to manage the groups of data and their names is called a "file system." There are many kinds of file systems, each with unique structure and logic, properties of speed, flexibility, security, size and more. Some file systems have been designed to be used for specific applications. For example, the ISO 9660 file system is designe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unix-like
A Unix-like (sometimes referred to as UN*X or *nix) operating system is one that behaves in a manner similar to a Unix system, although not necessarily conforming to or being certified to any version of the Single UNIX Specification. A Unix-like application is one that behaves like the corresponding Unix command or shell. Although there are general philosophies for Unix design, there is no technical standard defining the term, and opinions can differ about the degree to which a particular operating system or application is Unix-like. Some well-known examples of Unix-like operating systems include Linux and BSD. These systems are often used on servers, as well as on personal computers and other devices. Many popular applications, such as the Apache web server and the Bash shell, are also designed to be used on Unix-like systems. One of the key features of Unix-like systems is their ability to support multiple users and processes simultaneously. This allows users to run multipl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount (Unix)
In computing, mount is a command in various operating systems. Before a user can access a file on a Unix-like machine, the file system on the device which contains the file needs to be mounted with the mount command. Frequently mount is used for SD card, USB storage, DVD and other removable storage devices. The command is also available in the EFI shell. Overview The mount command instructs the operating system that a file system is ready to use, and associates it with a particular point in the overall file system hierarchy (its ''mount point'') and sets options relating to its access. Mounting makes file systems, files, directories, devices and special files available for use and available to the user. Its counterpart umount instructs the operating system that the file system should be disassociated from its mount point, making it no longer accessible and may be removed from the computer. It is important to umount a device before removing it since changes to files may have only ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fstab
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 into the larger file system structure. The fstab file is read by the mount command, which happens automatically at boot time to determine the overall file system structure, and thereafter when a user executes the mount command to modify that structure. It is the duty of the system administrator to properly create and maintain the fstab file. While fstab is used for basic system configuration, for other uses, it has been superseded by automatic mounting mechanisms. The file has other names on some versions of Unix; for example, it is found at /etc/vfstab on Solaris systems. Modern use Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
/etc
In Unix and operating systems inspired by it, the file system is considered a central component of the operating system. It was also one of the first parts of the system to be designed and implemented by Ken Thompson in the first experimental version of Unix, dated 1969. As in other operating systems, the filesystem provides information storage and retrieval, and one of several forms of interprocess communication, in that the many small programs that traditionally form a Unix system can store information in files so that other programs can read them, although pipes complemented it in this role starting with the Third Edition. Also, the filesystem provides access to other resources through so-called ''device files'' that are entry points to terminals, printers, and mice. The rest of this article uses ''Unix'' as a generic name to refer to both the original Unix operating system and its many workalikes. Principles The filesystem appears as one rooted tree of directories. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Df (Unix)
(abbreviation for ''disk free'') is a standard Unix command used to display the amount of available disk space for file systems on which the invoking user has appropriate read access. is typically implemented using the statfs or statvfs system calls. History for Unix-like systems is part of the X/Open Portability Guide since issue 2 of 1987. It was inherited into the first version of POSIX and the Single Unix Specification. It first appeared in Version 1 AT&T Unix. The version of bundled in GNU coreutils was written by Torbjorn Granlund, David MacKenzie, and Paul Eggert. The command is available as a separate package for Microsoft Windows as part of the UnxUtils collection of native Win32 ports of common GNU Unix-like utilities. Usage The Single UNIX Specification specifications for are: df k -tdel ile... ; :Use 1024-byte units, instead of the default 512-byte units, when writing space figures. ; :Use a standard, portable, output format ; :Display in more easily human ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
