Questão 1
Questão
Error messages generated by commands are sent where by default?
Responda
-
Log files
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STDOUT
-
STDERR
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STDIN
Questão 2
Questão
A successful command will print output to STDOUT.
Questão 3
Questão
Which of the following commands will direct error messages to the file, error.log?
Responda
-
ls /root >> error.log
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ls /root 2> error.log
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ls /root $> error.log
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ls /root > error.log
Questão 4
Questão
A pipe allows you to…
Responda
-
…send the same input to multiple commands.
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…type multiple commands at one prompt.
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…send the output of one command to another.
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…send the output of a command to a file.
Questão 5
Responda
-
STDIN
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STDALL
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STDOUT
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STDERR
Questão 6
Questão
Which of the following commands will append its output to output.file?
Responda
-
echo Testing > output.file
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echo Testing >> output.file
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output.file < echo Testing
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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
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cat list.file | sort
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cat list.file >> sort
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echo list.file > sort
Questão 8
Questão
Which option of the head command will display only the first five lines of a file?
Questão 9
Questão
The grep command…
Responda
-
…will display all the lines that begin with the specified Regular Expression.
-
…is not case sensitive.
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…will display all the lines in a file containing the specified Regular Expression.
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…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.
Questão 11
Questão
Which of the following commands will display only lines that begin with start?
Responda
-
grep *start file.txt
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grep $start file.txt
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grep start file.txt
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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
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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?
Questão 14
Questão
Which of the following commands can be used to scroll through a text file?
Questão 15
Questão
The find command can search for files based on the size of the file.
Questão 16
Questão
Which of the following commands scans the file to determine file locations?
Questão 17
Questão
Which option for the cut command is used to specify a delimiter?
Questão 18
Questão
Which option for the cut command is used to specify the field?
Questão 19
Questão
Which option for the wc command will print the number of lines in a file?
Questão 20
Questão
Which option for the wc command will print the total number of words in a file?
Questão 21
Questão
Which command can be used to print line numbers?
Questão 22
Questão
The command echo “text” > file.txt will create file.txt if it does not already exist.
Questão 23
Questão
The command echo “text” > file.txt will not overwrite file.txt if it already exists.
Questão 24
Questão
The command echo “text” >> file.txt will not overwrite file.txt if it already exists.