Which signal is sent by the kill command by default?
What is the purpose of the Bash built-in export command?
A. To allow disks to be mounted remotely.
B. To automate the export of variables for subsequently executed commands.
C. To make the command history available to sub-shells.
D. To run a command as a process in a sub-shell.
E. To save variable settings for future shell invocations.
Once a shell variable has been created, how can the variable be removed from the environment?
B. set -d VAR
C. set -u VAR
D. unset VAR
What command will display all of the background tasks running in the current shell?
C. kill -l
Given the following output: prompt> myapp + Stopped myapp prompt> Which of the following commands will resume executing the stopped process and make it the current job?
A. bg myapp
B. continue myapp
C. exec myapp
D. fg myapp
E. myapp &
Which of the following commands will print the first few lines of a text file to the shell?
A. cat -n 10 filename
B. dump -n 10 filename
C. head -n 10 filename
D. print -n 10 filename
When should grep -F or the fgrep command be used to search the content of text files?
A. When files need to be searched that contain non-ASCII text.
B. When only the presence of the search pattern needs to be reported and not every line that matches thesearch.
C. When the text being searched for does not contain any regular expression patterns.
D. When the text files will be searched multiple times. Subsequent calls to fgrep will run faster.
QUESTION 248 CORRECT TEXT
Which command displays the contents of the Kernel Ring Buffer on the command line? (Provide only the command name without any options or path information)
You are having some trouble with a disk partition and you need to do maintenance on this partition but your users home directories are on it and several are logged in. Which command would disconnect the users and allow you to safely execute maintenance tasks?
A. halt 1
B. init 1
C. logout -all now
D. runlevel 1
E. shutdown -maintenance now
Which of the following commands will write a message to the terminals of all logged in users?
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