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Question 1:

Download the document from ftp://instructor.example.com/pub/testfile, find all lines containing [abcde] and redirect to /MNT/answer document, then rearrange the order according the original content.

Correct Answer: Check the anser in explanation.

Download the file to /tmp first grep [abcde] /tmp/testfile > /mnt/answer


Question 2:

Who ever creates the files/directories on a data group owner should automatically be in the same group owner as data.

Correct Answer: Check the anser in explanation.

1.

chmod g s /data

2.

Verify using: ls -ld /data Permission should be like this: drwxrws— 2 root sysadmin 4096 Mar 16 18:08 /data If SGID bit is set on directory then who every users creates the files on directory group owner automatically the owner of parent directory. To set the SGID bit: chmod g s directory To Remove the SGID bit: chmod g-s directory


Question 3:

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 4:

Add an additional swap partition of 754 MB to your system.

The swap partition should automatically mount when your system boots.

Do not remove or otherwise alter any existing swap partitions on your system.

Correct Answer: Check the anser in explanation.

fdisk -l fdisk -cu /dev/vda p n e or p select e default (first): enter default (last): enter n default(first): enter default(first): 754M t (1-5)

l: 82 p w #reboot #mkswap /dev/vda5

vim /etc/fstab /dev/vda5 swap swap defaults 0 0 wq

mount -a

swapon -a

swapon -s


Question 5:

/data Directory is shared from the server1.example.com server. Mount the shared directory that:

a.

when user try to access, automatically should mount

b.

when user doesn\’t use mounted directory should unmount automatically after 50 seconds.

c.

shared directory should mount on /mnt/data on your machine.

Correct Answer: Check the anser in explanation.

1. vi /etc/auto.master /mnt /etc /auto.misc –timeout=50 vi /etc/auto.misc data -rw,soft,intr server1.example.com:/data service autofs restart chkconfig autofs on When you mount the other filesystem, you should unmount the mounted filesystem, Automount feature of linux helps to mount at access time and after certain seconds, when user unaccess the mounted directory, automatically unmount the filesystem. /etc/auto.master is the master configuration file for autofs service. When you start the service, it reads the mount point as defined in /etc/auto.master.


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Question 6:

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: Check the anser in 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


Question 7:

Add admin group and set gid=600

Correct Answer: Check the anser in explanation.

# groupadd -g 600 admin


Question 8:

Create a swap space, set the size is 600 MB, and make it be mounted automatically after rebooting the system (permanent mount).

Correct Answer: Check the anser in explanation.

if=/dev/zero of=/swapfile bs=1M count=600 mkswap /swapfile /etc/fstab: /swapfile swap swap defaults 0 0 mount -a


Question 9:

There are two different networks, 192.168.0.0/24 and 192.168.1.0/24. Your System is in 192.168.0.0/24 Network. One RHEL6 Installed System is going to use as a Router. All required configuration is already done on Linux Server. Where

192.168.0.254 and 192.168.1.254 IP Address are assigned on that Server. How will make successfully ping to 192.168.1.0/24 Network\’s Host?

Correct Answer: Check the anser in explanation.

vi /etc/sysconfig/network GATEWAY=192.168.0.254

OR

vi /etc/sysconf/network-scripts/ifcfg-eth0 DEVICE=eth0

BOOTPROTO=static

ONBOOT=yes

IPADDR=192.168.0.?

NETMASK=255.255.255.0

GATEWAY=192.168.0.254

service network restart

Gateway defines the way to exit the packets. According to question System working as a router for two networks have IP Address 192.168.0.254 and 192.168.1.254.


Question 10:

Update the kernel from ftp://instructor.example.com/pub/updates. According the following requirements:

The updated kernel must exist as default kernel after rebooting the system.

The original kernel still exists and is available in the system.

Correct Answer: Check the anser in explanation.

rpm -ivh kernel-firm… rpm -ivh kernel…


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