RedHat RHCSA EX200 Questions & Answers

• Question 1:

  Configure a cron Task.

  User natasha must configure a cron job, local time 14:23 runs and executes: */bin/echo hiya every day.

  Correct Answer: Check the anser in explanation.

  crontab –e –u natasha 23 14/bin/echo hiya crontab -l -u natasha // view systemctlenable crond systemcdlrestart crond

• Question 2:

  SELinux must run in force mode.

  Correct Answer: Check the anser in explanation.

  /etc/sysconfig/selinux SELINUX=enforcing

• Question 3:

  Create the user named eric and deny to interactive login.

  Correct Answer: Check the anser in explanation.

  useradd eric

  passwd eric

  vi /etc/passwd

  eric:x:505:505::/home/eric:/sbin/nologin

  Which shell or program should start at login time is specified in /etc/passwd file? By default, Redhat Enterprise Linux assigns the /bin/bash shell to the users. To deny the interactive login, you should write /sbin/nologin or /bin/ false instead of login shell.

• Question 4:

  There are two different networks 192.168.0.0/24 and 192.168.1.0/24. Where 192.168.0.254 and 192.168.1.254 IP Address are assigned on Server. Verify your network settings by pinging 192.168.1.0/24 Network's Host.

  Correct Answer: Check the anser in explanation.

  vi /etc/sysconfing/network NETWORKING=yes HOSTNAME=station?.example.com GATEWAY=192.168.0.254 service network restart

  2.vi /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE=eth0 ONBOOT=yes BOOTPROTO=static IPADDR=X.X.X.X NETMASK=X.X.X.X GATEWAY=192.168.0.254 ifdown eth0 ifup eth0

• Question 5:

  Install a FTP server, and request to anonymous download from /var/ftp/pub catalog. (it needs you to configure yum direct to the already existing file server.)

  Correct Answer: Check the anser in explanation.

  # cd /etc/yum.repos.d # vim local.repo [local] name=local.repo baseurl=file:///mnt enabled=1 gpgcheck=0 # yum makecache # yum install -y vsftpd # service vsftpd restart # chkconfig vsftpd on # chkconfig --list vsftpd # vim /etc/vsftpd/vsftpd.conf anonymous_enable=YES

• Question 6:

  Create a 512M partition, make it as ext4 file system, mounted automatically under /mnt/data and which take effect automatically at boot-start.

  Correct Answer: Check the anser in explanation.

  # fdisk /dev/vda n +512M w # partprobe /dev/vda # mkfs -t ext4 /dev/vda5 # mkdir -p /data # vim /etc/fstab /dev/vda5 /data ext4 defaults 0 0 # mount -a

• Question 7:

  Set cronjob for user natasha to do /bin/echo hiya at 14:23.

  Correct Answer: Check the anser in explanation.

  # crontab -e -u natasha 23 14 * * * /bin/echo hiya wq!

• Question 8:

  Configure the FTP service in your system, allow remote access to anonymous login and download the program by this service. Service is still running after system rebooting.

  Correct Answer: Check the anser in explanation.

  yum install vsftpd /etc/init.d/vsftpd start chkconfig vsftpd on

• Question 9:

  One Package named zsh is dump on ftp://server1.example.com under /pub/updates directory and your FTP server is 192.168.0.254. Install the package zsh.

  Correct Answer: Check the anser in explanation.

  rpm -ivh ftp://server1/example.com/pub/updates/zsh-* or

  Login to ftp server : ftp ftp://server1.example.com using anonymous user.

  Change the directory: cd pub and cd updates

  Download the package: mget zsh-*

  Quit from the ftp prompt : bye

  Install the package

  rpm -ivh zsh-*

  Verify either package is installed or not : rpm -q zsh

• Question 10:

  Configure the verification mode of your host account and the password as LDAP. And it can login successfully through ldapuser40. The password is set as "password".

  And the certificate can be downloaded from http://ip/dir/ldap.crt. After the user logs on the user has no host directory unless you configure the autofs in the following questions.

  Correct Answer: Check the anser in explanation.

  system-config-authentication LDAP Server: ldap//instructor.example.com (In domain form, not write IP) OR # yum groupinstall directory-client (1.krb5-workstation 2.pam-krb5 3.sssd) # system-config-authentication 1.User Account Database: LDAP 2.LDAP Search Base DN: dc=example,dc=com 3.LDAP Server: ldap://instructor.example.com (In domain form, not write IP) 4.Download CA Certificate 5.Authentication Method: LDAP password 6.Apply getent passwd ldapuser40