Red Hat Red Hat Certifications EX200 Questions & Answers

• Question 21:

  You are a System administrator. Using Log files very easy to monitor the system. Now there are 50 servers running as Mail, Web, Proxy, DNS services etc. You want to centralize the logs from all servers into on LOG Server. How will you configure the LOG Server to accept logs from remote host?

  Correct Answer: Check the anser in explanation.

  By default, system accept the logs only generated from local host. To accept the Log from other host configure: vi /etc/sysconfig/syslog SYSLOGD_OPTIONS="-m 0 -r" Where -m 0 disables 'MARK' messages. -r enables logging from remote machines -x disables DNS lookups on messages received with -r service syslog restart

• Question 22:

  Create a backup file named /root/backup.tar.bz2, which contains the contents of /usr/local, bar must use the bzip2 compression.

  Correct Answer: Check the anser in explanation.

  cd /usr/local

  tar -jcvf /root/backup.tar.bz2*

  mkdir /test

  tar -jxvf /root/backup.tar.bz2 -C /test/

• Question 23:

  Configure a default software repository for your system.

  One

  YUM has already provided to configure your system on http://server.domain11.example.com/pub/x86_64/Server, and can be used normally.

  Correct Answer: Check the anser in explanation.

  Yum-config-manager --add-repo=http://content.example.com/rhel7.0/x86-64/dvd” is to generate a file vim content.example.com_rhel7.0_x86_64_dvd.repo, Add a line gpgcheck=0 Yumcleanall Yumrepolist Almost 4305 packages are right, Wrong Yum Configuration will lead to some following questions cannot be worked out.

• Question 24:

  Successfully resolve to server1.example.com where your DNS server is 172.24.254.254.

  Correct Answer: Check the anser in explanation.

  vi /etc/resolv.conf nameserver 172.24.254.254

  host server1.example.com

  On every clients, DNS server is specified in /etc/resolv.conf. When you request by name it tries to resolv from DNS server.

• Question 25:

  According the following requirements to create user, user group and the group members:

  -

  A group named admin.

  -

  A user named mary, and belong to admin as the secondary group.

  -

  A user named alice, and belong to admin as the secondary group.

  -

  A user named bobby, bobby's login shell should be non-interactive. Bobby not belong to admin as the secondary group. Mary, Alice, bobby users must be set "password" as the user's password.

  Correct Answer: Check the anser in explanation.

  groupadd admin useradd -G admin mary useradd -G admin alice useradd -s /sbin/nologin bobby echo "password" | passwd --stdin mary echo "password" | passwd --stdin alice echo "password" | passwd --stdin bobby

• Question 26:

  Find all lines in the file /usr/share/dict/words that contain the string seismic. Put a copy of all these lines in their original order in the file /root/wordlist. /root/wordlist should contain no empty lines and all lines must be exact copies of the original lines in /usr/share/dict/words.

  Correct Answer: Check the anser in explanation.

  grep seismic /usr/share/dict/words> /root/wordlist

• Question 27:

  Configure

  a HTTP server, which can be accessed through http://station.domain40.example.com.

  Please

  download the released page from http://ip/dir/example.html.

  Correct Answer: Check the anser in explanation.

  # yum install -y httpd # chkconfig httpd on # cd /var/www/html # wget http://ip/dir/example.html # cp example.com index.html # vim /etc/httpd/conf/httpd.conf NameVirtualHost 192.168.0.254:80 DocumentRoot /var/www/html/ ServerName station.domain40.example.com

• Question 28:

  Configure NTP.

  Configure NTP service, Synchronize the server time, NTP server: classroom.example.com

  Correct Answer: Check the anser in explanation.

  Configure the client: Yum -y install chrony Vim /etc/chrony.conf Add: server classroom.example.com iburst Start: systemctl enable chronyd systemctl restart chronyd Validate: timedatectl status

• Question 29:

  Configure your NFS services. Share the directory by the NFS Shared services.

  Correct Answer: Check the anser in explanation.

  /etc/init.d/rpcbind start /etc/init.d/nfslock start /etc/init.d/nfs start chkconfig rpcbind on chkconfig nfslock on chkconfig nfs on showmount -e localhost

• Question 30:

  Configure your Host Name, IP Address, Gateway and DNS. Host name: dtop5.dn.ws.com IP Address: 172.28.10.5/4 Gateway: 172.28.10.1 DNS: 172.28.10.1

  Correct Answer: Check the anser in explanation.

  Configure Host Name

  vim /etc/sysconfig/network NETWORKING=yes HOSTNAME=dtop5.dn.ws.comGATEWAY=172.28.10.1

  2. Configure IP Address, Gateway and DNS Configure the network by Network Manager:

  

  Note: Please remember to choose two options:

  Connect automatically

  Available to all users Click "Apply", save and exit, and restart your network services: # Service network restart

  3. Validate these profiles: a) Check gateway: # vim / etc / sysconfig / network NETWORKING=yes HOSTNAME=dtop5.dn.ws.com GATEWAY=172.28.10.1 b) Check Host Name: # vim /etc/hosts

  

  c) Check DNS: # vim /etc/resolv.conf

  # Generated by NetworkManager Search dn.ws.com Nameserver 172.28.10.1 d) Check Gateway: # vim /etc/sysconfig/network-scripts/ifcfg-eth0