Railways Exam > Railways Questions > In Linux and Unix CTRL+D is used to _______.a...
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In Linux and Unix CTRL+D is used to _______.
- a)Cancel the currently running command
- b)Turn all output stopped on the screen back on (XON)
- c)Erase the completed line
- d)Closes the command line shell
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
In Linux and Unix CTRL+D is used to _______.a)Cancel the currently run...
CTRL + D closes the command line shell. This sends an EOF (End of file) marker to shell, and shell exits when it receives this marker. This is similar to running the exit command.
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In Linux and Unix CTRL+D is used to _______.a)Cancel the currently run...
Explanation:
The correct answer is option D: "Closes the command line shell."
CTRL + D is a keyboard shortcut used in Linux and Unix systems to close the command line shell or terminate the current shell session. It sends an "EOF" (End-of-File) character to the shell, indicating that there is no more input to be read.
Here's a detailed explanation of each option:
a) Cancel the currently running command:
CTRL + C is commonly used to cancel the currently running command in Linux and Unix systems. It sends a "SIGINT" (interrupt signal) to the active process, causing it to terminate. CTRL + D, on the other hand, is used to close the shell itself, rather than canceling a specific command.
b) Turn all output stopped on the screen back on (XON):
CTRL + S is used to stop the output on the screen temporarily in Linux and Unix systems. This is called XOFF (transmit off) or flow control. To resume the output, CTRL + Q is used. CTRL + D is not related to turning the output on or off.
c) Erase the completed line:
The shortcut to erase the completed line in Linux and Unix systems is CTRL + U. It clears the entire line that has been typed in the command prompt. CTRL + D is not used for erasing the completed line.
d) Closes the command line shell:
This is the correct answer. CTRL + D is used to close the command line shell or terminate the current shell session. It is equivalent to typing the "exit" command. When CTRL + D is pressed, the shell session ends, and you return to the previous shell or the parent process.
In summary, CTRL + D is used to close the command line shell or terminate the current shell session in Linux and Unix systems. It is not used to cancel a running command, turn output on/off, or erase the completed line.
The correct answer is option D: "Closes the command line shell."
CTRL + D is a keyboard shortcut used in Linux and Unix systems to close the command line shell or terminate the current shell session. It sends an "EOF" (End-of-File) character to the shell, indicating that there is no more input to be read.
Here's a detailed explanation of each option:
a) Cancel the currently running command:
CTRL + C is commonly used to cancel the currently running command in Linux and Unix systems. It sends a "SIGINT" (interrupt signal) to the active process, causing it to terminate. CTRL + D, on the other hand, is used to close the shell itself, rather than canceling a specific command.
b) Turn all output stopped on the screen back on (XON):
CTRL + S is used to stop the output on the screen temporarily in Linux and Unix systems. This is called XOFF (transmit off) or flow control. To resume the output, CTRL + Q is used. CTRL + D is not related to turning the output on or off.
c) Erase the completed line:
The shortcut to erase the completed line in Linux and Unix systems is CTRL + U. It clears the entire line that has been typed in the command prompt. CTRL + D is not used for erasing the completed line.
d) Closes the command line shell:
This is the correct answer. CTRL + D is used to close the command line shell or terminate the current shell session. It is equivalent to typing the "exit" command. When CTRL + D is pressed, the shell session ends, and you return to the previous shell or the parent process.
In summary, CTRL + D is used to close the command line shell or terminate the current shell session in Linux and Unix systems. It is not used to cancel a running command, turn output on/off, or erase the completed line.
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In Linux and Unix CTRL+D is used to _______.a)Cancel the currently running commandb)Turn all output stopped on the screen back on (XON)c)Erase the completed lined)Closes the command line shellCorrect answer is option 'D'. Can you explain this answer?
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