There is no "default" shell. Different distros are free to pick whatever shell they want. The most commonly used as the main shell is Bash, but other shells, including the Korn shell, C shell, Friendly Interactive Shell, or Almquist shell are also available. Many distros also use a variant of the Almquist shell provided by BusyBox in their initial ramdisks before switching to the real root and launching the main shell.
Most common would be sh
Most popular would be bash
bash also known as bourne again shell
It is the command interpreter: command.com
A shell in Linux is the interpreter that provides a commandline interface (CLI). There are many kinds of shells.
There is no such thing. The "default shell" is a decision made by the distributor.
That would be a semi-contradiction; the command line would need to be already running in order to enter a command. The name of the program that actually provides the command line is called a shell. There are many different shells available for Linux, including Bash, ash, C Shell, fish, ksh, zsh, and scsh.The default command shell is /bin/sh (not /bin/bash, note).
The shell.
A bashism is a shell command specific to the Bash interpreter.
It is the command interpreter: command.com
It depends on the shell interpreter you are using, but in general the I/O redirection operators are >, >>, |.
echo $SHELL
A command interpreter is a program that converts the human written commands into the machine understandable language through the i/o devices. It is with the help of this interpreter we can actually communicate with the operating systems. A command interpreter is a separate program but can be referred as a component of an operating system.
bash (Bourne Again Shell) is the default shell in most Linux distributions. It was created as part of the GNU project.
exit.