EX200 Red Hat Certified System Administrator –RHCSA exams demo

QUESTION 1
SIMULATION
Configure your Host Name, IP Address, Gateway and DNS.
Host name: station.domain40.example.com
/etc/sysconfig/network
hostname=abc.com
hostname abc.com
IP Address:172.24.40.40/24
Gateway172.24.40.1
DNS:172.24.40.1
Correct Answer: See explanation below.
Section: (none)
Explanation
Explanation/Reference:
Explanation: # cd /etc/syscofig/network-scripts/
# ls
# vim ifcfg-eth0 (Configure IP Address, Gateway and DNS) IPADDR=172.24.40.40
GATEWAY=172.24.40.1
DNS1=172.24.40.1
# vim /etc/sysconfig/network
(Configure Host Name)
HOSTNAME= station.domain40.example.com
OR
Graphical Interfaces:
System->Preference->Network Connections (Configure IP Address, Gateway and DNS) Vim /etc/sysconfig/
network
(Configure Host Name)
QUESTION 2
SIMULATION
Add 3 users: harry, natasha, tom.
The requirements: The Additional group of the two users: harry, Natasha is the admin group. The user: tom's
login shell should be non-interactive.
Correct Answer: See explanation below.
Section: (none)
Explanation
Explanation/Reference:
Explanation: # useradd -G admin harry
# useradd -G admin natasha
# useradd -s /sbin/nologin tom
# id harry;id Natasha (Show additional group)
# cat /etc/passwd
(Show the login shell)
OR
# system-config-users
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QUESTION 3
SIMULATION
Create a catalog under /home named admins. Its respective group is requested to be the admin group. The
group users could read and write, while other users are not allowed to access it. The files created by users from
the same group should also be the admin group.
Correct Answer: See explanation below.
Section: (none)
Explanation
Explanation/Reference:
Explanation: # cd /home/
# mkdir admins /
# chown .admin admins/
# chmod 770 admins/
# chmod g+s admins/
QUESTION 4
SIMULATION
Configure a task: plan to run echo hello command at 14:23 every day.
Correct Answer: See explanation below.
Section: (none)
Explanation
Explanation/Reference:
Explanation: # which echo
# crontab -e
23 14 * * * /bin/echo hello
# crontab -l (Verify)
QUESTION 5
SIMULATION
Find the files owned by harry, and copy it to catalog: /opt/dir
Correct Answer: See explanation below.
Section: (none)
Explanation
Explanation/Reference:
Explanation: # cd /opt/
# mkdir dir
# find / -user harry -exec cp -rfp {} /opt/dir/ \;
QUESTION 6
SIMULATION
Find the rows that contain abcde from file /etc/testfile, and write it to the file/tmp/testfile, and the sequence is
requested as the same as /etc/testfile.
Correct Answer: See explanation below.
Section: (none)
Explanation
Explanation/Reference:
Explanation: # cat /etc/testfile | while read line;
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do
echo $line | grep abcde | tee -a /tmp/testfile
done
OR
grep `abcde' /etc/testfile > /tmp/testfile
QUESTION 7
SIMULATION
Create a 2G swap partition which take effect automatically at boot-start, and it should not affect the original
swap partition.
Correct Answer: See explanation below.
Section: (none)
Explanation
Explanation/Reference:
Explanation: # fdisk /dev/sda
p(
check Partition table)
n(
create new partition: press e to create extended partition, press p to create the main partition, and the
extended partition is further divided into logical partitions) Enter
+2G
tl
Wp
artx -a /dev/sda
partprobe
mkswap /dev/sda8
Copy UUID
swapon -a
vim /etc/fstab
UUID=XXXXX swap swap defaults 0 0
(swapon -s)
QUESTION 8
SIMULATION
Create a user named alex, and the user id should be 1234, and the password should be alex111.
Correct Answer: See explanation below.
Section: (none)
Explanation
Explanation/Reference:
Explanation: # useradd -u 1234 alex
# passwd alex
alex111
alex111
OR
echo alex111|passwd -stdin alex
QUESTION 9
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SIMULATION
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: See explanation below.
Section: (none)
Explanation
Explanation/Reference:
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 10
SIMULATION
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: See explanation below.
Section: (none)
Explanation
Explanation/Reference:
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
<VirtualHost 192.168.0.254:80>
DocumentRoot /var/www/html/
ServerName station.domain40.example.com
</VirtualHost>
QUESTION 11
SIMULATION
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: See explanation below.
Section: (none)
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Explanation
Explanation/Reference:
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
QUESTION 12
SIMULATION
Configure autofs to make sure after login successfully, it has the home directory autofs, which is shared as /
rhome/ldapuser40 at the ip: 172.24.40.10. and it also requires that, other ldap users can use the home directory
normally.
Correct Answer: See explanation below.
Section: (none)
Explanation
Explanation/Reference:
Explanation: # chkconfig autofs on
# cd /etc/
# vim /etc/auto.master
/rhome /etc/auto.ldap
# cp auto.misc auto.ldap
# vim auto.ladp
ldapuser40 -rw,soft,intr 172.24.40.10:/rhome/ldapuser40
* -rw,soft,intr 172.16.40.10:/rhome/&
# service autofs stop
# server autofs start
# showmount -e 172.24.40.10
# su - ladpuser40
QUESTION 13
SIMULATION
Configure the system synchronous as 172.24.40.10.
Correct Answer: See explanation below.
Section: (none)
Explanation
Explanation/Reference:
Explanation: Graphical Interfaces:
System-->Administration-->Date & Time
OR
# system-config-date
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QUESTION 14
SIMULATION
Change the logical volume capacity named vo from 190M to 300M. and the size of the floating range should set
between 280 and 320. (This logical volume has been mounted in advance.)
Correct Answer: See explanation below.
Section: (none)
Explanation
Explanation/Reference:
Explanation: # vgdisplay
(Check the capacity of vg, if the capacity is not enough, need to create pv , vgextend , lvextend)
# lvdisplay (Check lv)
# lvextend -L +110M /dev/vg2/lv2
# resize2fs /dev/vg2/lv2
mount -a
(Verify)
-------------------------------------------------------------------------------
(Decrease lvm)
# umount /media
# fsck -f /dev/vg2/lv2
# resize2fs -f /dev/vg2/lv2 100M
# lvreduce -L 100M /dev/vg2/lv2
# mount -a
# lvdisplay (Verify)
OR
# e2fsck -f /dev/vg1/lvm02
# resize2fs -f /dev/vg1/lvm02
# mount /dev/vg1/lvm01 /mnt
# lvreduce -L 1G -n /dev/vg1/lvm02
# lvdisplay (Verify)
QUESTION 15
SIMULATION
Create a volume group, and set 16M as a extends. And divided a volume group containing 50 extends on
volume group lv, make it as ext4 file system, and mounted automatically under /mnt/data.
Correct Answer: See explanation below.
Section: (none)
Explanation
Explanation/Reference:
Explanation: # pvcreate /dev/sda7 /dev/sda8
# vgcreate -s 16M vg1 /dev/sda7 /dev/sda8
# lvcreate -l 50 -n lvm02
# mkfs.ext4 /dev/vg1/lvm02
# blkid /dev/vg1/lv1
# vim /etc/fstab
# mkdir -p /mnt/data
UUID=xxxxxxxx /mnt/data ext4 defaults 0 0
# vim /etc/fstab
# mount -a
# mount
(Verify)
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QUESTION 16
SIMULATION
Upgrading the kernel as 2.6.36.7.1, and configure the system to Start the default kernel, keep the old kernel
available.
Correct Answer: See explanation below

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