EX200 Question #7: Real Exam Question with Answer & Explanation

Question

07. Configure NTP Configure your system to synchronize with the NTP server of materials.example.com (Note: materials.example.com is an alias for classroom.example.com). Correct Answer: See the below explanation Explanation Explanation/Reference: Solution: # Install the chrony service for configuring NTP server [root@node1 ~]# yum -y install chrony [root@node1 ~]# vim /etc/chrony.conf server materials.example.com iburst [root@node1 ~]# systemctl restart chronyd [root@node1 ~]# systemctl enable chronyd # Check # Set an arbitrary time [root@node1 ~]# date -s "1982-1-1" Fri Jan 1 12:00:00 AM EST 1982 # Execute after 3-5 seconds, too fast won't synchronize the time [root@node1 ~]# date Tue Dec 12 11:40:19 PM EST 2023 # Use the chronyc command to check synchronization status [root@node1 ~]# chronyc sources -v .-- Source mode '^' = server, '=' = peer, '#' = local clock. / .- Source state '*' = current best, '+' = combined, '-' = not combined, | / 'x' = may be in error, '~' = too variable, '?' = unusable. || .- xxxx [ yyyy ] +/- zzzz || Reachability register (octal) -. | xxxx = adjusted offset, || Log2(Polling interval) --. | | yyyy = measured offset, || \ | | zzzz = estimated error. || | | \ MS Name/IP address Stratum Poll Reach LastRx Last sample =============================================================================== ^* classroom.lab.example.com 8 6 17 42 -14us[ -11us] +/- 463us