201-450 Exam Questions

Considering the following kernel IP routing table below, which of the following commands must be used to remove the route to the network 10.10.1.0/24? (Select TWO answers) Kernel I...

Which of the following wireless tools can be used to check the wireless network link quality? (Choose TWO correct answers.)

Which of the following files are used to resolve hostnames to IP addresses? (Choose TWO correct answers.)

Which of the following commands will list the IPv4 neighbors of the current system? This includes IP and MAC addresses. (Choose TWO correct answers.)

Which of the following commands can be used to list IPv4 addresses and MAC addresses for IP devices that the system has seen on the local network?

What is the command to add another IP address (192.168.1.2) to a network interface (eth0) that already has (at least) one IP address in the 192.168.1.0/24 subnet?

The following is an excerpt from the output of tcpdump -nli eth1 'udp': 13:03:17.277327 IP 192.168.123.5.1065 > 192.168.5.112.53: 43653+ A? lpi.org. (25) 13:03:17.598624 IP 192.168...

The following is an excerpt from the output of tcpdump -nli eth1: 13:03:17.277327 IP 192.168.123.5.1065 > 192.168.5.112.21: Flags [.], ack 1 (truncated) 13:03:17.598624 IP 192.168....

Which of the following commands can be used to script interactions with various TCP or UDP services?

A correctly formatted entry has been added to /etc/hosts.deny to prevent certain clients from connecting to a service but this is having no effect. What could be the cause of this?...

Which /etc/hosts.allow entries will permit access to sshd for users from the 192.168.1.0/24 subnet? (Choose TWO correct answers.)

A network client has an ethernet interface (eth0) configured with an IP address in the subnet 192.168.0.0/24. This subnet has a router, with the IP address 192.168.0.1, that connec...

What should be done to ensure a client machine uses the recursive nameserver running on the IP address 192.168.0.1? (Choose TWO correct answers.)

What should be done after updating the configuration file for syslogd in order to make the changes become effective? (Choose TWO correct answers.)

What does the -p3 option to the patch command do?

When a makefile is included in a source code package, what are commonly defined targets in the file?

Which of the following files will be looked for and used by GNU make, if one of them exists, unless a different file is specified on the command line when trying to compile softwar...

A regular user, joe, has just run: ./configure && make && make install to build and install a program. However, the installation fails. What could be done to install the program? (...

Which of the following are common backup systems used in Linux? (Choose TWO correct answers.)

Which of the following commands will erase the contents of the /dev/sdb3 partition?

What mechanism does collectd use to gather monitoring information on systems?

What option in the collectd configuration file is required in order to define what to start monitoring?

How is the source code for the main Linux kernel modules distributed?

What is the functionality that PXE provides?

What are the main network services used by the PXE protocol? (Choose TWO correct answers.)

What is the purpose of the smartd daemon?

What component of a system does smartd monitor?

Which of the following are common Linux filesystem types used for root partitions? (Choose THREE correct answers.)

Where would fsck put any unreferenced file or file fragments on a ext4 filesystem?

What is the main template file used by autofs?

The main configuration file for autofs has this entry: /home /etc/auto.home What is the meaning of the /etc/auto.home file?

Which of the following is an example path to a Linux software RAID array?

What mount option must be used in /etc/fstab when mounting an iSCSI target?

What are the options to node.startup in the iscsid.conf file? (Choose TWO correct answers.)

What command is used to make an exact copy, at a single point in time, of a logical volume for backup purposes?

What action should be performed after increasing the size of a logical volume?

Which command can be used to scan a specified network looking for IP addresses that appear to be in use?

Which of the following filter keywords for tcpdump specify the transfer direction for network packets? (Choose TWO correct answers.)

What is incorrect about these entries in /etc/hosts which could be causing host name lookup problems with host2? host1 192.168.1.12 host2 192.168.1.12

Under which of the following circumstances would the command ping output the string (DUP!)?

Which one of these directories should not be backed up?

The following command has just been run successfully: cd /opt; tar xvf /dev/nst0; What will happen if the command sequence is run again?

In order to gather performance data with sar over a longer period of time, which command should be run periodically from cron?

In which directory tree are files modified when changing kernel parameters using the command sysctl?

What information is found in the following excerpt from the file /proc/mdstat? (Choose two.)

Which command is used to make an exact copy, at a single point in time, of a logical volume while still allowing the original logical volume to be updated?

Which of the following commands shows capabilities and usable frequencies for the wireless interface wlan0?

What effect does the -f option to the update-rc.d command have on files in the /etc/rcX.d/ and /etc/init.d/ directories?

Which of the following commands lists IPv4 addresses and MAC addresses of network nodes that the local system has seen on its directly connected IP networks?

Which of the following commands restores only those files containing lpi in their name from the archive lpifiles.tar.gz?