102-500 exam

Which command will set the local machine's timezone to UTC?A . cat UTC > /etc/timezoneB . ln -s /usr/share/zoneinfo/UTC /etc/localtimeC . date --timezone=UTCD . mv /usr/timezone/UTC /etcView AnswerAnswer: B Explanation: The command ln -s /usr/share/zoneinfo/UTC /etc/localtime will create a symbolic link from the file /etc/localtime to the file /usr/share/zoneinfo/UTC, which...

Which of the following commands puts the output of the command date into the shell variable mydate?A . mydate="$(date)"B . mydate="exec date"C . mydate="$((date))"D . mydate="date"E . mydate="${date}"View AnswerAnswer: A Explanation: ∗∗ ∗∗ (date)" Comprehensive Thecorrectwaytoputtheoutputofthecommanddateintotheshellvariablemy dateistousecommandsubstitutionwiththesyntax(command). This will execute the command in a subshell and replace the expression with...

Of the ways listed, which is the best way to temporarily suspend a single user's ability to interactively login?A . Add the user name to /etc/nologin.B . Change the user's password.C . Change the user name in /etc/passwd.D . Use change to expire the user account.E . Place the command...

Fill in Blanks The ________ command is used to add a group to the system.View AnswerAnswer: groupadd, /usr/sbin/groupadd Explanation: The groupadd command creates a new group using the options specified on the command line and the default values from the /etc/login.defs file. It adds an entry for the new group...

What is the purpose of the iconv command?A . It converts bitmap images from one format to another such as PNG to JPEG.B . It verifies that the root directory tree complies to all conventions from the Filesystem Hierarchy Standard (FHS).C . It displays additional meta information from icon files...

How can the existing environment variable FOOBAR be suppressed for the execution of the script./myscript only? A. unset -v FOOBAR;./myscript B. set -a FOOBAR="";./myscript C. env -u FOOBAR./myscript D. env -i FOOBAR./myscriptView AnswerAnswer: C Explanation: The env command can be used to run a utility or command in a custom...

Which of the following SQL queries counts the number of occurrences for each value of the field order_type in the table orders?A . SELECT order_type,COUNT(*) FROM orders WHERE order_type=order_type;B . SELECT order_type,COUNT(*) FROM orders GROUP BY order_type;C . COUNT(SELECT order_type FROM orders);D . SELECT COUNT(*) FROM orders ORDER BY order_type;E...

Of the ways listed, which is the best method to temporarily suspend a user's ability to interactively login?A . Use passwd -d username to give the user an empty password.B . Use chage to expire the user account.C . Change the user's password.D . Add the command exit to the...

On a system using shadowed passwords, the most correct permissions for /etc/passwd are ___ and the most correct permissions for /etc/shadow are _________.A . -rw-r-----, -r--------B . -rw-r--r--, -r--r--r--C . -rw-r--r--, -r--------D . -rw-r--rw-, -r-----r--E . -rw-------, -r--------View AnswerAnswer: C Explanation: The /etc/passwd file stores local accounts of the system....

Which of the following fields are available in both the global /etc/crontab file as well as in user-specific crontab files? (Select TWO correct answers)A . YearB . MinuteC . UsernameD . CommandView AnswerAnswer: B, D Explanation: The crontab file format consists of six fields: minute, hour, day of month, month,...