Correct Answer: BCD

B: Your system must have access to the internet to install Ksplice. If you are using a proxy, set the proxy in your shell:

export http_proxy=http://proxy.company.com:port export https_proxy=http://proxy.company.com:port

CD: Once you have an access key run the following commands as root, replacing YOUR_ACCESS_KEY with the access key you received upon sign-up:

wget -N https://www.ksplice.com/uptrack/install-uptrack sh install-uptrack YOUR_ACCESS_KEY uptrack-upgrade y

E: If you'd like Ksplice Uptrack to automatically install updates as they become available, run:

sh install-uptrack YOUR_ACCESS_KEY --autoinstall in place of the above install-uptrack command, or set "autoinstall = yes" in your /etc/uptrack/uptrack.conf after installation.

Reference: Ksplice, Installation instructions

Correct Answer: D

Mount the DVD iso of the desired update of Oracle Linux Release 5. Use the following command for mounting the DVD media inserted in /dev/cdrom

# mount -r -o loop -t iso9660 /dev/cdrom /mnt

Use following command to mount iso image file

# mount -o loop /mnt

Correct Answer: C

yumdownloader is a program for downloading RPMs from Yum repositories.

Synopsis

yumdownloader [options] package1 [package2...]

Note:

* yum - Yellowdog Updater Modified yum is an interactive, rpm based, package manager. It can automatically perform system updates, including dependency analysis and obsolete processing based on "repository" metadata. It can also perform installation of new packages, removal of old packages and perform queries on the installed and/or available packages among many other commands/services (see below). yum is similar to other high level package managers like apt-get and smart.

Correct Answer: C

The system-config-network-tui and system-config-network commands start a text-based network

configuration tool.

Navigate using the "tab", "arrow" and "return" keys. The "Device configuration" option gives a list of

network devices.

Selecting the device allows you to edit the adapter's network configuration, which is saved to the "/etc/

sysconfig/network-scripts/ifcfg-eth0" file.

The "DNS configuration" option on the first screen allows you to modify the configuration in the "/etc/

sysconfig/network" and "/etc/resolv.conf" files.

Correct Answer: B

*

iostat - Report Central Processing Unit (CPU) statistics and input/output statistics for devices, partitions and network filesystems (NFS).

*

The iostat command is used for monitoring system input/output device loading by observing the time the devices are active in relation to their average transfer rates. The iostat command generates reports that can be used to change system configuration to better balance the input/output load between physical disks.

Incorrect:

Not A: Related to kernel and processes.

*

iotop - simple top-like I/O monitor

*

iotop watches I/O usage information output by the Linux kernel (requires 2.6.20 or later) and displays a table of current I/O usage by processes or threads on the system.

*

iotop displays columns for the I/O bandwidth read and written by each process/thread during the sampling period. It also displays the percentage of time the thread/process spent while swapping in and while waiting on I/O. For each process, its I/O priority (class/level) is shown. In addition, the total I/O bandwidth read and written during the sampling period is displayed at the top of the interface.

Not C: related to RAM usage.

*

The entries in the /proc/meminfo can help explain what's going on with your memory usage, if you know how to read it.

*

High-Level Statistics MemTotal: Total usable ram (i.e. physical ram minus a few reserved bits and the kernel binary code) MemFree: Is sum of LowFree+HighFree (overall stat) MemShared: 0; is here for compat reasons but always zero. Buffers: Memory in buffer cache. mostly useless as metric nowadays Cached: Memory in the pagecache (diskcache) minus SwapCache SwapCache: Memory that once was swapped out, is swapped back in but still also is in the swapfile (if memory is needed it doesn't need to be swapped out AGAIN because it is already in the swapfile. This saves I/O)

Not D: vmstat - Report virtual memory statistics