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Questions and Answers
What does the > character do when used to redirect the standard output of a command?
What does the > character do when used to redirect the standard output of a command?
- It appends to a file instead of overwriting it
- It displays the output on the screen
- It redirects standard error instead of standard output
- It overwrites any contents of an existing file (correct)
How can the contents of an existing file be preserved when redirecting the standard output of a command?
How can the contents of an existing file be preserved when redirecting the standard output of a command?
- By using the < character
- By using the << character
- By using the >> character (correct)
- By using the > character
What happens when the number 2 is placed before the arrow > character in redirection?
What happens when the number 2 is placed before the arrow > character in redirection?
- It redirects standard output to a file
- It redirects standard error to a file (correct)
- It appends to a file instead of overwriting it
- It displays both standard output and standard error on the screen
What does the >> character do when used in redirection?
What does the >> character do when used in redirection?
What does the negative value option (-n) do in the tail command?
What does the negative value option (-n) do in the tail command?
What is the purpose of using the pipe character (|) in command line?
What is the purpose of using the pipe character (|) in command line?
What is STDIN in I/O redirection?
What is STDIN in I/O redirection?
How is I/O redirection achieved in command line?
How is I/O redirection achieved in command line?
What does the ^ character signify in regular expressions?
What does the ^ character signify in regular expressions?
Which command is mentioned as also supporting regular expressions besides the grep command?
Which command is mentioned as also supporting regular expressions besides the grep command?
What does the pattern 'r..f' match in the given example?
What does the pattern 'r..f' match in the given example?
When would the $ character match in a regular expression pattern?
When would the $ character match in a regular expression pattern?
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