3. Which of the following files are known as special files in UNIX? Explanation: There are two special files named /dev/null and /dev/tty which is used in UNIX for special purposes.
What is a special file in Linux?
In Unix-like operating systems, a device file or special file is an interface to a device driver that appears in a file system as if it were an ordinary file. … These special files allow an application program to interact with a device by using its device driver via standard input/output system calls.
What are the 3 types of files in UNIX?
The seven standard Unix file types are regular, directory, symbolic link, FIFO special, block special, character special, and socket as defined by POSIX. Different OS-specific implementations allow more types than what POSIX requires (e.g. Solaris doors).
Which of the following is a file in Unix?
All files are organized into directories. These directories are organized into a tree-like structure called the file system. Files in Unix System are organized into multi-level hierarchy structure known as a directory tree. At the very top of the file system is a directory called “root” which is represented by a “/”.
What are the main features of Unix?
The UNIX operating system supports the following features and capabilities:
- Multitasking and multiuser.
- Programming interface.
- Use of files as abstractions of devices and other objects.
- Built-in networking (TCP/IP is standard)
- Persistent system service processes called “daemons” and managed by init or inet.
What are the 3 types of files?
There are three basic types of special files: FIFO (first-in, first-out), block, and character. FIFO files are also called pipes. Pipes are created by one process to temporarily allow communication with another process. These files cease to exist when the first process finishes.
What are .socket files?
Sockets are a special file type, similar to TCP/IP sockets, providing inter-process networking protected by the file system’s access control. For example, when you open a listening socket in one terminal with netcat: nc -lU socket.sock. then send data from another terminal by: echo mytext | nc -U socket.sock.
What are the four components of the Unix file system?
Unix / Linux – File System Basics
- Directory Structure. …
- Navigating the File System. …
- The df Command. …
- The du Command. …
- Mounting the File System. …
- Unmounting the File System. …
- User and Group Quotas.
What is the purpose of in Unix?
Unix is an operating system. It supports multitasking and multi-user functionality. Unix is most widely used in all forms of computing systems such as desktop, laptop, and servers. On Unix, there is a Graphical user interface similar to windows that support easy navigation and support environment.
Are three types of accounts on a Unix system?
Unix / Linux – User Administration
- Root account. This is also called superuser and would have complete and unfettered control of the system. …
- System accounts. System accounts are those needed for the operation of system-specific components for example mail accounts and the sshd accounts. …
- User accounts.