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Why shell is called command processor?
A shell program is called a command processor because it has to process commands according to what the user wishes to do. Along with executing commands as specified by the user it also has its own programming language and can be instructed to do things programmatically.
What was the first shell used by Linux and Unix that used commands entered at a command prompt?
The very first one, period. The first shell for Unix didn't originally have a name but has since been referred to as the Thompson shell. The first shell ported to Linux was bash.
What is the difference between interactive use of shell command and running a shell?
In an interactive shell session the shell program waits for the user to type in a command. When receiving a command the shell program will then attempt to locate it and process (execute) the command. You are interacting with the shell. Running a shell file requires a pre-stored series of commands stored in a file. Unless the shell program you are running is interactive then the shell executes each command in sequence, without involving the user at all.
What command allow you to open a command prompt in XP?
The filename for the command processor shell for most Windows versions from XP and up are command.com (usually used for older DOS applications that are designed to work with Windows) and cmd.exe. They both exist in \Windows\System32.
What does the shell ordinary do while a command is executing?
While the command is executing, the shell waits for the process to finish.
What is the output of the command 'echo shell shell'?
The output would be 'shell shell' (without the quotes, of course)
What command do you type in Linux to determine the shell you are using?
echo $SHELL
What does the shell do when a command executed successfully?
While the command is executing, the shell waits for the process to finish.
Which command is used to get out of unix environment?
Typically the 'exit' command gets you out of the current shell environment you are in; if this is the login shell then you will be logged out of the system.
What is the purpose of a shell script?
A shell script is used to automatically enter a series of commands without having to make the user type them out.
What is the purpose of using echo command?
The echo command echoes out any of the command line arguments given to it. It is commonly used in shell scripts to echo what portions of the shell script are doing.
What is the command prompt in Linux known as?
The shell.
