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