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Q31. CORRECT TEXT

Make on /storage directory that only the user owner and group owner member can fully access.

Answer and Explanation:

1. chmod 770 /storage

2. Verify using : ls -ld /storage

Preview should be like:

drwxrwx--- 2 root sysusers 4096 Mar 16 18:08 /storage

To change the permission on directory we use the chmod command. According to the question that only the owner user (root) and group member (sysusers) can fully access the directory so:

chmod 770 /archive

Q32. CORRECT TEXT

Download a index.html file from ftp.server1.example.com and set as default page for you station?.example.com where ? is your host number. Note file is anonymously available.

Answer and Explanation:

1. ftp ftp://server1.example.com

2. Login as an anonymous and download the file.

3. Copy the file in /var/www/html if you downloaded in another location.

4. service httpd restart

5. Test using links: links http://station?.example.com

Check the SELinux context of index.html file, should like this:

-rw-r--r-- root root system_u:object_r:httpd_sys_content_t /var/www/html/index.html

If SELinux Context is mismatched, use the restorecon -R /var command

Q33. CORRECT TEXT

Dig Server1.example.com, Resolve to successfully through DNS Where DNS server is 172.24.254.254

Answer and Explanation:

#vi /etc/resolv.conf

nameserver 172.24.254.254

# dig server1.example.com

#host server1.example.com

DNS is the Domain Name System, which maintains a database that can help your computer translate domain names such as www.redhat.com to IP addresses such as 216.148.218.197. As no individual DNS server is large enough to keep a database for the entire Internet, they can refer requests to other DNS servers.

DNS is based on the named daemon, which is built on the BIND (Berkeley Internet Name Domain) package developed through the Internet Software Consortium Users wants to access by name so DNS will interpret the name into ip address. You need to specify the Address if DNS server in each and every client machine. In Redhat Enterprise Linux, you need to specify the DNS server into /etc/resolv.conf file.

After Specifying the DNS server address, you can verify using host, dig and nslookup commands.

Q34. CORRECT TEXT

Configure the webserver for your local domain. Download a www.html file from

ftp.server1.example.com/pub/rhce and rename it as index.html.

Answer and Explanation:

Your local domain mean example.com domain. Lookup the example.com using host example.com you will get the IP address 192.168.0.254.

1. vi /etc/httpd/conf/httpd.conf

ServerName sexample.com

DocumentRoot /var/www/example

DirectoryIndex index.html

ServerAdmin webmaster@example.com

</VirtualHost>

2. mkdir /var/www/example

3. Download the index.html file from the ftp server specified in question

4. Rename the www.html file to index.html

Check the SELinux context of index page , should like this:

-rw-r--r-- root root system_u:object_r:httpd_sys_content_t /var/www/html/index.html

If SELinux Context is mismatched, use the restorecon -R /var command

5. service httpd start|restart

6. chkconfig httpd on

7. check using: links http://example.com

Q35. CORRECT TEXT

Create the directory /archive and group owner should be the sysuser group.

Answer and Explanation:

1. chgrp sysuser /archive

2. Verify using ls -ld /archive command. You should get like

drwxr-x--- 2 root sysadmin 4096 Mar 16 17:59 /archive

chgrp command is used to change the group ownership of particular files or directory.

Another way you can use the chown command.

chown root:sysuser /archive

Q36. CORRECT TEXT

Install the Cron Schedule for jeff user to display "Hello" on daily 5:30.

Answer and Explanation:

30 05 * * * /bin/echo "Hello"

3. crontab -u jeff schedule.txt

4. service crond restart

The cron system is essentially a smart alarm clock. When the alarm sounds, Linux runs the commands of your choice automatically. You can set the alarm clock to run at all sorts of regular time intervals. Alternatively, the at system allows you to run the command of your choice once, at a specified time in the future.

Red Hat configured the cron daemon, crond. By default, it checks a series of directories for jobs to run, every minute of every hour of every day. The crond checks the /var/spool/cron directory for jobs by user. It also checks for scheduled jobs for the computer under /etc/crontab and in the /etc/cron.d directory.

Here is the format of a line in crontab. Each of these columns is explained in more detail:

#minute, hour, day of month, month, day of week, command

* * * * * command

Q37. CORRECT TEXT

Backup of the Redhat Enterprise Linux 5 is on /var/ftp/pub, /var/www/html/pub on server named server1.example.com. You can install all required packages using yum by creating the repository file.

Answer and Explanation:

1. Create the repository file

#vi /etc/yum.repos.d/server1.repo

[station?]

name=station?

baseurl=ftp://server1.example.com/pub/

enabled=1

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release

# yum install <packagename>

Q38. CORRECT TEXT

/data directory on linux server should make available on windows to only john with full access but read only to other users and make sure that /data can access only within example.com domain.

Configure to make available.

Answer and Explanation:

1. vi /etc/samba/smb.conf

[global]

netbios name=station?

workgroup=station?

security=user

smb passwd file=/etc/samba/smbpasswd

encrypt passwords=yes

hosts allow= .example.com

[data]

path=/data

public=no

writable=no

write list=john

browsable=yes

2. smbpasswd -a john

3. service smb start

4. chkconfig smb on

/etc/samba/smb.conf. There are some pre-defined section, i. global à use to define the global options, ii. Printers à use to share the printers, iii. homes à use the share the user's home directory.

Security=user à validation by samba username and password. May be there are other users also.

To allow certain share to certain user we should use valid users option.

smbpasswd à Helps to change user's smb password. -a option specifies that the username

following should be added to the local smbpasswd file.

If any valid users option is not specified, then all samba users can access the shared data. By Default shared permission is on writable=no means read only sharing. Write list option is used to allow write access on shared directory to certain users or group members.

Q39. CORRECT TEXT

There is a server having 172.24.254.254 and 172.25.254.254. Your System lies on 172.24.0.0/16.

Make successfully ping to 172.25.254.254 by Assigning following IP: 172.24.0.x Where x is your station number.

Answer and Explanation:

1. vi /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0

BOOTPROTO=static

ONBOOT=yes

IPADDR=x.x.x.x

NETMASK=x.x.x.x

2. Enter the IP Address as given station number by your examiner: example: 172.24.0.1

3. Enter Subnet Mask

4. Enter Default Gateway and primary name server

5. press on ok

6. ifdown eth0

7. ifup eth0

8. verify using ifconfig

In the lab server is playing the role of router, IP forwarding is enabled. Just set the Correct IP and gateway, you can ping to 172.25.254.254.

Q40. CORRECT TEXT

One Logical Volume is created named as myvol under vo volume group and is mounted. The Initial Size of that Logical Volume is 124MB. Make successfully that the size of Logical Volume 245MB without losing any data. The size of logical volume 240MB to 255MB will be acceptable.

Answer and Explanation:

1. First check the size of Logical Volume: lvdisplay /dev/vo/myvol

2. Increase the Size of Logical Volume: lvextend -L+121M /dev/vo/myvol

3. Make Available the size on online: ext2online /dev/vo/myvol

4. Verify the Size of Logical Volume: lvdisplay /dev/vo/myvol

5. Verify that the size comes in online or not: df -h

We can extend the size of logical Volume using the lvextend command. As well as to decrease the size of Logical Volume, use the lvresize command. In LVM v2 we can extend the size of Logical Volume without unmount as well as we can bring the size of Logical Volume on online using ext2online command.

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