Which of the following meta-character is used in command substitution?

Quiz questions on shell basics, pattern matching, escaping and quoting, redirection and pipes, command substitution and shell variables. A Unix shell is a command-line interpreter that provides a command-line user interface for Unix-like operating systems. It's both an interactive command language and a scripting language. The shell is used by the operating system to control the execution of the system using shell scripts. Users typically interact with a Unix shell using a terminal emulator. However, direct operation via serial hardware connections or Secure Shell are common for server... Show more

Quiz questions on shell basics, pattern matching, escaping and quoting, redirection and pipes, command substitution and shell variables.

A Unix shell is a command-line interpreter that provides a command-line user interface for Unix-like operating systems. It's both an interactive command language and a scripting language. The shell is used by the operating system to control the execution of the system using shell scripts. Users typically interact with a Unix shell using a terminal emulator. However, direct operation via serial hardware connections or Secure Shell are common for server systems.

Here are some of the common Unix shells:
Bourne Shell (sh), C Shell (csh), Korn Shell (ksh), Z Shell (zsh), Bourne Again Shell (bash), Almquist shell (ash), Friendly Interactive Shell (fish), PowerShell

Shells are used to interact with the operating system and to perform tasks such as:
Listing files, Changing directories, Creating and deleting files, Starting and stopping processes, Editing files, Compiling and running programs, Automating tasks

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