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- Error messages generated by commands are sent where by default?
- Log files
- STDOUT
- STDERR*
- STDIN
- A successful command will print output to STDOUT.True or False?
- True*
- False
- Which of the following commands will direct error messages to the file, error.log? (choose one)
- ls /root >> error.log
- ls /root 2> error.log*
- ls /root $> error.log
- ls /root > error.log
- A pipe allows you to…
- …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.
- Channel 2 is:
- STDIN
- STDALL
- STDOUT
- STDERR*
- Which of the following commands will append its output to output.file?
- echo Testing > output.file
- echo Testing >> output.file*
- output.file < echo Testing
- echo Testing -> output.file
- Which command(s) can be used to sort the lines of list.file alphabetically and display it on the screen? (choose two)
- sort < list.file*
- cat list.file | sort*
- cat list.file >> sort
- echo list.file > sort
- Which option of the head command will display only the first five lines of a file?
- -l 5
- No option needed; head displays only five lines by default.
- -n
- -n 5 *
- The grep command…
- …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.
- The grep command can be used with glob characters.True or False?
- True*
- False
- Which of the following commands will display only lines that begin with start?
- grep *start file.txt
- grep $start file.txt
- grep start file.txt
- grep ^start file.txt*
- Which of the following commands will display only lines that begin with test?
- grep ^test file.txt*
- grep $test* file.txt
- grep *test file.txt
- grep &test file.txt
- Which of the following commands will display lines that contain either start or end?
- egrep start end file.txt
- egrep ‘start|end’ file.txt*
- egrep start&end file.txt
- egrep (start|end) file.txt
- Which of the following commands can be used to scroll through a text file? (choose two)
- some
- less*
- cat
- more*
- The find command can search for files based on the size of the file.True or False?
- True*
- False
- Which of the following commands scans the file to determine file locations?
- search
- locate
- where
- find*
- Which option for the cut command is used to specify a delimiter?
- -f
- -d *
- =
- -D
- Which option for the cut command is used to specify the field?
- -D
- -f *
- -d
- #
- Which option for the wc command will print the number of lines in a file?
- -l *
- -w
- -C
- -L
- Which option for the wc command will print the total number of words in a file?
- -l
- -L
- -C
- -w *
- Which command can be used to print line numbers?
- num
- sort
- ln
- nl*
- The command echo “text” > file.txt will create file.txt if it does not already exist.True or False?
- True*
- False
- The command echo “text” > file.txt will not overwrite file.txt if it already exists.True or False?
- True
- False*
- The command echo “text” >> file.txt will not overwrite file.txt if it already exists.True or False?
- True*
- False
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