Correct Answer: D

When I have a device that is acting up, I tend to run: ethtool ethX, check the Supported link modes, the Link partner advertised link modes and the actual speed and Duplex. If my Supported link mode is set low (say 10/Half for some reason) but my switch supports 1000baseT/Full then I'll use ethtool -s ethX to change my ethernet settings to 1000baseT/Full. Just about anything you see from: ethtool ethX, can be changed with ethtool -S ethX. In this case you would use the following:

ethtool -S eth0 speed 1000 duplex full autoneg on

Correct Answer: C

Only a privileged user may run a process with lower niceness: $ nice -n -1 nice nice: cannot set niceness: Permission denied $ sudo nice -n -1 nice Note: Sudo stands for either "substitute user do" or "super user do" (depending upon how you want to look at it). What sudo does is incredibly important and crucial to many Linux distributions. Effectively, sudo allows a user to run a program as another user (most often the root user).

Correct Answer: AB

A: uptrack-show

You can see what updates have been installed by running uptrack-show:

B: uptrack-upgrade

Ksplice updates are the same security and bugfix updates you would get from your Linux vendor, packaged in a special rebootless form. To apply Ksplice updates, just run uptrack- upgrade.

Correct Answer: B

The cron utility then wakes up every minute, examining all stored crontabs, checking each command to see if it should be run in the current minute.

Correct Answer: C

hd0,1 indicates the first hard drive and the second partition.

Note:

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grub - the grub shell

Enter the GRand Unified Bootloader command shell.

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In the following example we assume that the boot partition is located at /dev/hda5 and that GRUB must

be installed on the first disk's MBR.

grub> root (hd0,4) Filesystem type is ext2fs, partition type 0x83 grub> setup (hd0) Checking if "/boot/grub/stage1" exists... yes Checking if "/boot/grub/stage2" exists... yes Checking if "/boot/grub/e2fs_stage1_5" exists... yes Running "embed /boot/grub/e2fs_stage1_5 (hd0)"... 23 sectors are embedded.

succeeded Running "install /boot/grub/stage1 (hd0) (hd0)1+23 p (hd0,4)/boot/grub/stage2 /boot/grub/menu.lst"... succeeded Done. grub> quit The first command includes the location of the boot partition, thus indicating where the boot loader files are located. The second command installs GRUB on the MBR. For this purpose, a file called stage1_5 is used to grant GRUB access to the file system on the boot partition.

Correct Answer: B

Example: options netconsole netconsole=6666@10.0.0.1/eth0,514@10.0.0.2/00:1A:A0:D2:55:66

6666 => Server source port

10.0.0.1 => Server IP eth0 => Server NIC 514 => Client listening port

10.0.0.2 => Client IP 00:1A:A0:D2:55:66 => Client MAC

Correct Answer: ABDE

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The /proc file system exists in slightly different variations on Linux and the Solaris OS. On both systems, / proc is a directory containing files whose names are the process IDs of the current active processes on the system (A). Each PID-named file is in turn a directory. /proc on Linux has various other directories besides processes. Most of these deal with processors, devices, and statistics on the system. On Linux, one looks in /proc to find information about processes, processors, devices, machine architecture, and so on (E).

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The /proc is a virtual file system that contains files that show the status of the Linux operating system kernel. Most of the files have a size of 0 bytes, but they actually contain a large amount of data. The timestamps of these virtual files changes as the contents of the files are updated by the OS.

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The following virtual files provide an indication, at the moment they are being viewed, about the system hardware: n /proc/partitions: Gives the size and name of partitions

n /proc/meminfo: Memory statistics and segment sizes

n /proc/mounts: List of the mount points

n /proc/uptime: Uptime of the system

n /proc/interrupts: List of interrupts on the system

D: The contents of the files can be seen with the classical command cat, thereby viewing the information of the CPU.

linux-mlpb:~ # cat /proc/cpuinfo

processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 9 model name : Intel(R) Pentium(R) M processor 1700MHz stepping : 8 cpu MHz : 1694.501 cache size : 1024 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 up pebs bts bogomips : 3408.43 clflush size : 64

linux-mlpb:~ # cat /proc/cpuinfo

processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 9 model name : Intel(R) Pentium(R) M processor 1700MHz stepping : 8 cpu MHz : 1694.501

cache size : 1024 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 up pebs bts bogomips : 3408.43 clflush size : 64

Correct Answer: AC

A: When a kernel crash is captured, the core dump can be either stored as a file in a local file system, written directly to a device, or sent over a network using the NFS (Network File System) or SSH (Secure Shell) protocol. Only one of these options can be set at the moment, and the default option is to store the vmcore file in the /var/crash/ directory of the local file system. To change this, as root, open the /etc/ kdump.conf configuration file in a text editor and edit the options.

C: You can use the system-config-kdump GUI to setup Kdump:

Correct Answer: ACD

In order to install the Oracle Database 11g R2 on Oracle Linux 6, your system needs to meet a few prerequisites, as outlined in the Linux Installation Guides. Using the Oracle RDBMS Server 11gR2 Preinstall RPM, you can complete most of the pre-installation configuration tasks.

The package:

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(A) Causes the download and installation of various software packages and specific versions needed for database installation, with package dependencies resolved via yum

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(C) Creates the user oracle and the groups oinstall and dba, which are the defaults used during database installation

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(D) Modifies kernel parameters in /etc/sysctl.conf to change settings for shared memory, semaphores, the maximum number of file descriptors, and so on

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(D) Sets hard and soft shell resource limits in /etc/security/limits.conf, such as the number of open files, the number of processes, and stack size to the minimum required based on the Oracle Database 11g Release 2 Server installation requirements

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Sets numa=off in the kernel boot parameters for x86_64 machines

Correct Answer: AC

A: How does the disk heartbeat work?

Every node writes every two secs to its block in the heartbeat system file. The block offset is equal to its

global node number. So node 0 writes to the first block, node 1 to the second, etc. All the nodes also read

the heartbeat sysfile every two secs. As long as the timestamp is changing, that node is deemed alive.