11374810
Descripción
Test por brayhan gutierrez cespedes, actualizado hace más de 1 año
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Creado por brayhan gutierrez cespedes
hace más de 6 años
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Pregunta 1
Pregunta
Error messages generated by commands are sent where by default?
Respuesta
-
Log files
-
STDOUT
-
STDERR
-
STDIN
Pregunta 2
Pregunta
A successful command will print output to STDOUT.
Respuesta
- True
- False
Pregunta 3
Pregunta
Which of the following commands will direct error messages to the file, error.log?
Respuesta
-
ls /root >> error.log
-
ls /root 2> error.log
-
ls /root $> error.log
-
ls /root > error.log
Pregunta 4
Pregunta
A pipe allows you to…
Respuesta
-
…send the same input to multiple commands.
-
…type multiple commands at one prompt.
-
…send the output of one command to another.
-
…send the output of a command to a file.
Pregunta 5
Pregunta
Channel 2 is:
Respuesta
-
STDIN
-
STDALL
-
STDOUT
-
STDERR
Pregunta 6
Pregunta
Which of the following commands will append its output to output.file?
Respuesta
-
echo Testing > output.file
-
echo Testing >> output.file
-
output.file < echo Testing
-
echo Testing -> output.file
Pregunta 7
Pregunta
Which command(s) can be used to sort the lines of list.file alphabetically and display it on the screen?
Respuesta
-
sort < list.file
-
cat list.file | sort
-
cat list.file >> sort
-
echo list.file > sort
Pregunta 8
Pregunta
Which option of the head command will display only the first five lines of a file?
Respuesta
-
-l 5
-
No option needed; head displays only five lines by default.
-
-n
-
-n 5
Pregunta 9
Pregunta
The grep command…
Respuesta
-
…will display all the lines that begin with the specified Regular Expression.
-
…is not case sensitive.
-
…will display all the lines in a file containing the specified Regular Expression.
-
…will display the line numbers in a file that contain a specified Regular Expression.
Pregunta 10
Pregunta
The grep command can be used with glob characters.
Respuesta
- True
- False
Pregunta 11
Pregunta
Which of the following commands will display only lines that begin with start?
Respuesta
-
grep *start file.txt
-
grep $start file.txt
-
grep start file.txt
-
grep ^start file.txt
Pregunta 12
Pregunta
Which of the following commands will display only lines that begin with test?
Respuesta
-
grep ^test file.txt
-
grep $test* file.txt
-
grep *test file.txt
-
grep &test file.txt
Pregunta 13
Pregunta
Which of the following commands will display lines that contain either start or end?
Respuesta
-
egrep start end file.txt
-
egrep ‘start|end’ file.txt
-
egrep start&end file.txt
-
egrep (start|end) file.txt
Pregunta 14
Pregunta
Which of the following commands can be used to scroll through a text file?
Respuesta
-
some
-
less
-
cat
-
more
Pregunta 15
Pregunta
The find command can search for files based on the size of the file.
Respuesta
- True
- False
Pregunta 16
Pregunta
Which of the following commands scans the file to determine file locations?
Respuesta
-
search
-
locate
-
where
-
find
Pregunta 17
Pregunta
Which option for the cut command is used to specify a delimiter?
Respuesta
-
-f
-
-d
-
=
-
-D
Pregunta 18
Pregunta
Which option for the cut command is used to specify the field?
Respuesta
-
-D
-
-f
-
-d
-
#
Pregunta 19
Pregunta
Which option for the wc command will print the number of lines in a file?
Respuesta
-
-l
-
-w
-
-C
-
-L
Pregunta 20
Pregunta
Which option for the wc command will print the total number of words in a file?
Respuesta
-
-l
-
-L
-
-C
-
-w
Pregunta 21
Pregunta
Which command can be used to print line numbers?
Respuesta
-
num
-
sort
-
ln
-
nl
Pregunta 22
Pregunta
The command echo “text” > file.txt will create file.txt if it does not already exist.
Respuesta
- True
- False
Pregunta 23
Pregunta
The command echo “text” > file.txt will not overwrite file.txt if it already exists.
Respuesta
- True
- False
Pregunta 24
Pregunta
The command echo “text” >> file.txt will not overwrite file.txt if it already exists.
Respuesta
- True
- False
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