LPIC-2 Exam 201

In capacity planning exercises, which tools assist in listing and identifying processes of interest? (Choose TWO correct answers.)

• acpid

• lsof

• pstree

• telinit

Answer explanation

In capacity planning exercises, tools like lsof and pstree assist in listing and identifying processes of interest. These tools provide information about open files and the process hierarchy, respectively. By using lsof, you can identify processes that have specific files open, while pstree helps visualize the relationship between processes. These tools are valuable in understanding resource utilization and optimizing system performance.

In the following output, what is the 5-minute load average for the system?

• 0.47

• 24.71

• 35.31

• There is no 5-minute interval

• It is some value between 0.47 and 24.71.

Answer explanation

The 5-minute load average for the system is 24.71. This value represents the average number of processes in the system's run queue over the past 5 minutes. It indicates the system's workload and can help determine if the system is under heavy load or not. The other options are incorrect: 0.47, 35.31, and 'There is no 5-minute interval' are not the correct load averages, and 'It is some value between 0.47 and 24.71' is too vague and does not provide the exact load average.

Which of the following tools are used to measure memory usage? (Choose THREE correct answers.)

• mpstat

• pstree

• sar

• top

• vmstat

Answer explanation

To measure memory usage, you can use the following tools: mpstat, sar, and top. These tools provide information about memory usage and performance. Mpstat is a tool for monitoring CPU usage, but it can also provide memory statistics. Sar is a system activity reporter that can collect and report system performance information, including memory usage. Top is a command-line tool that provides real-time information about system processes, including memory usage. Using these tools, you can monitor and analyze memory usage on your system.

What happens if the Linux kernel can't mount the root filesystem when booting?

• An error message is shown and the administrator is asked by the kernel to specify a valid root filesystem to continue the boot process.

• An error message is shown and the system reboots after a keypress.

• An error message is shown and the system boots in maintenance mode.

• An error message is shown showing which device couldn't be mounted or informing that init couldn't be found.

• An error message is shown stating that the corresponding kernel module couldn't be loaded.

Answer explanation

When the Linux kernel fails to mount the root filesystem during booting, it displays an error message indicating the device that couldn't be mounted or informing that init couldn't be found. This error message helps identify the specific issue and allows the administrator to take appropriate action to resolve it. The system may not be able to proceed with the boot process until the root filesystem is successfully mounted or init is found. This error message ensures that the administrator is aware of the problem and can address it accordingly.

Which command is used to install a new LILO boot loader?

• lilo

• lilo-config

• lilo-install

• install-lilo

Answer explanation

To install a new LILO boot loader, you can use the 'lilo' command. This command is specifically designed for installing and configuring the LILO boot loader. It ensures that the boot loader is properly installed and set up on your system. The 'lilo' command is the correct choice for this task, as it is specifically tailored for LILO boot loader installation. Remember to run this command with appropriate privileges to successfully install the LILO boot loader.

Where is the LILO boot loader code typically installed on a system with only a single Linux installation and no other operating systems?

• In the master boot record.

• In the boot sector.

• In the /boot directory.

• At the start of the kernel.

Answer explanation

The LILO boot loader code is typically installed in the master boot record. This is the first sector of the hard disk and contains the boot loader program. It is responsible for loading the operating system into memory and starting its execution. The master boot record is specific to the disk and not tied to any particular operating system. Therefore, even with a single Linux installation and no other operating systems, LILO is still installed in the master boot record. This ensures that the system can boot into Linux successfully.

A system with SysV-init has a service installed called apache2. Which file controls the start and stop of this service and is referenced by the various runlevel directories?

• /etc/init.d/apache2

• /etc/rc2.d/70apache2

• /etc/rc2.d/apache2

• /etc/rc2.d/apache2.start

Answer explanation

The file that controls the start and stop of the apache2 service in a system with SysV-init is /etc/init.d/apache2. This file is referenced by the various runlevel directories, such as /etc/rc2.d/70apache2 and /etc/rc2.d/apache2.start. The correct choice is /etc/init.d/apache2, which contains the necessary scripts and commands to manage the apache2 service. This file is responsible for starting, stopping, and restarting the service based on the system's runlevel. It is an essential component for managing the apache2 service in a SysV-init system.

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

• DNS

• DHCP

• HTTP

• TFTP

• NFS

Answer explanation

The PXE protocol uses two main network services: DHCP and TFTP. DHCP (Dynamic Host Configuration Protocol) is responsible for assigning IP addresses to network devices, while TFTP (Trivial File Transfer Protocol) is used to transfer boot files to the PXE client. DNS (Domain Name System) is not directly used by the PXE protocol, and HTTP (Hypertext Transfer Protocol) and NFS (Network File System) are also not commonly used in PXE. Therefore, the correct choices for this question are DHCP and TFTP.

During booting, when the Linux kernel loads an initramfs file, which command from the initramfs will be executed first, if present?

• /init

• /initrd

• /linuxrc

• /rc.local

• /sbin/init

Answer explanation

During booting, when the Linux kernel loads an initramfs file, the command that will be executed first, if present, is '/init'. This command is responsible for initializing the system and starting the boot process. It is important to note that the answer choice '/init' is the correct option for this question. The initramfs file contains essential files and scripts required for the early stages of the boot process, and the '/init' command plays a crucial role in this initialization.

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

• ext4

• VFAT

• NTFS

• XFS

• Btrfs

Answer explanation

The question asks about common Linux filesystem types used for root partitions. The correct choices are ext4, XFS, and Btrfs. Ext4 is the default filesystem for most Linux distributions and offers good performance and reliability. XFS is known for its scalability and is commonly used in enterprise environments. Btrfs is a modern filesystem that supports advanced features like snapshots and data checksums. VFAT and NTFS are not commonly used for root partitions in Linux. Therefore, the correct choices are ext4, XFS, and Btrfs.