停用 selinux 要重啟

如標題，少花冤枉時間

#vim /etc/selinux/config
#SELINUX=permissive ;調整 enforcing | disabled | permissive
 SELINUX=disabled

101.1 Determine and configure hardware settings 硬體設定的確認與組態

101.1 Determine and configure hardware settings 硬體設定的確認與組態
Weight 2
Description Candidates should be able to determine and configure fundamental system hardware.
Key Knowledge Areas
‧ Enable and disable integrated peripherals(外部設備).
‧ Configure systems with or without external peripherals such as keyboards.
‧ Differentiate between the various types of mass storage devices.
‧ Set the correct hardware ID for different devices, especially the boot device.
‧ Know the differences between coldplug and hotplug devices.
‧ Determine hardware resources for devices.
‧ Tools and utilities to list various hardware information (e.g. lsusb, lspci, etc.)
‧ Tools and utilities to manipulate USB devices
‧ Conceptual understanding of sysfs, udev, hald, dbus
sysfs - get file system type informaton
http://www.redhat.com/docs/manuals/enterprise/RHEL-5-manual/zh-TW/Installation_Guide/s1-s390info-sysfs.html
Linux 2.6 核心加入了 sysfs 檔案系統，它可說是proc、devfs、與 devpty 的集合。
sysfs 檔案系統列舉了連到系統的裝置與匯流排，整合到一個階層性的檔案系統下，
可以從 user space（使用者空間）存取。sysfs 檔案系統用來處理之前位於 /proc/
目錄中的裝置與驅動程式特定選項，同時包括了之前 devfs 所提供的動態裝置功能。
早期的 sysfs 中，許多驅動程式與工具程式還使用較老的 proc 項目；但可以確知的
是，將來會走向 sysfs。sysfs 檔案系統掛載在 /sys/ 之下，其中的目錄將連接到系
統的裝置分成多種項目並安裝在 /sysfs/ 子目錄下。


udev (dynamic device management) hald dbus
http://blog.csdn.net/colorant/archive/2008/07/04/2611559.aspx
http://mkl-note.blogspot.com/2008/03/hal-d-bus-udev.html
1. Linux 2.6 kernel 包含 hotplug，來判斷硬體的插入、移除。

2. Linux OS 透過 udev 來搭配 hotplug，專門維護 /dev 下的 device file，
這也就是我之前在摩托學園發的問題的所在點，它會動態的建立出各種裝置的 device file。

3. Linux OS 透過 D-BUS 來轉發系統訊息，告知 HAL 硬體的插入、拔出動作。

4. HAL 則呼叫相對應的應用程式來執行相對應的操作。

整個 auto mount 或 auto umount 就是上述的流程，實際上 HAL 還是一組 library，
除非應用程式以 HAL 的 library 來開發，否則應用程式通常無法直接收到 HAL 的消息，
簡單的說，HAL 還太低階，雖然他能夠直接操作特定的系統消息(像 DVD影片 插入時)，
但彈性不足(設定煩雜，不容易設定、修改)，因此通常還需要一個 manager 來進行真正的
HAL 操作。 這在 GNOME 就是 Gnome Volume Manager。

將整個堆疊以文字分層來表示，大致如下：

GNOME Volume Manager
HAL(Hardware Abstraction Layer)
D-Bus
udev
kernel hotplug

The following is a partial list of the used files, terms and utilities:
‧ /sys

‧ /proc
‧ /dev
‧ modprobe
‧ lsmod
‧ lspci
‧ lsusb

2009 LPI Exam 101

Exam 101: Detailed Objectives

This is a required exam for LPIC-1 or LPI certification Level 1. It covers basic skills for the Linux professional that are common across all distributions of Linux.

IMPORTANT INFORMATION: These are draft 101 objectives, which are valid effective 2009-04-01.

Each objective is assigned a weighting value. The weights range roughly from 1 to 10 and indicate the relative importance of each objective. Objectives with higher weights will be covered in the exam with more questions.

Topic 101: System Architecture

101.1 Determine and configure hardware settings
Weight 2
Description Candidates should be able to determine and configure fundamental system hardware.
Key Knowledge Areas
‧ Enable and disable integrated peripherals.
‧ Configure systems with or without external peripherals such as keyboards.
‧ Differentiate between the various types of mass storage devices.
‧ Set the correct hardware ID for different devices, especially the boot device.
‧ Know the differences between coldplug and hotplug devices.
‧ Determine hardware resources for devices.
‧ Tools and utilities to list various hardware information (e.g. lsusb, lspci, etc.)
‧ Tools and utilities to manipulate USB devices
‧ Conceptual understanding of sysfs, udev, hald, dbus
The following is a partial list of the used files, terms and utilities:
‧ /sys
‧ /proc
‧ /dev
‧ modprobe
‧ lsmod
‧ lspci
‧ lsusb

101.2 Boot the system
Weight 3
Description Candidates should be able to guide the system through the booting process.
Key Knowledge Areas
‧ Provide common commands to the boot loader and options to the kernel at boot time.
‧ Demonstrate knowledge of the boot sequence from BIOS to boot completion.
‧ Check boot events in the log files.
The following is a partial list of the used files, terms and utilities:
‧ /var/log/messages
‧ dmesg
‧ BIOS
‧ bootloader
‧ kernel
‧ init

101.3 Change runlevels and shutdown or reboot system
Weight 3
Description Candidates should be able to manage the runlevel of the system. This objective includes changing to single user mode, shutdown or rebooting the system. Candidates should be able to alert users before switching runlevel and properly terminate processes. This objective also includes setting the default runlevel.
Key Knowledge Areas
‧ Set the default runlevel.
‧ Change between run levels including single user mode.
‧ Shutdown and reboot from the command line.
‧ Alert users before switching runlevels or other major system event.
‧ Properly terminate processes.
The following is a partial list of the used files, terms and utilities:
‧ /etc/inittab
‧ shutdown
‧ init
‧ /etc/init.d
‧ telinit

Topic 102: Linux Installation and Package Management

102.1 Design hard disk layout
Weight 2
Description Candidates should be able to design a disk partitioning scheme for a Linux system.
Key Knowledge Areas
‧ Allocate filesystems and swap space to separate partitions or disks.
‧ Tailor the design to the intended use of the system.
‧ Ensure the /boot partition conforms to the hardware architecture requirements for booting.
The following is a partial list of the used files, terms and utilities:
‧ / (root) filesystem
‧ /var filesystem
‧ /home filesystem
‧ swap space
‧ mount points
‧ partitions

102.2 Install a boot manager
Weight 2
Description Candidates should be able to select, install and configure a boot manager.
Key Knowledge Areas
‧ Providing alternative boot locations and backup boot options.
‧ Install and configure a boot loader such as GRUB.
‧ Interact with the boot loader.
The following is a partial list of the used files, terms and utilities:
‧ /boot/grub/menu.lst
‧ grub-install
‧ MBR
‧ superblock
‧ /etc/lilo.conf
‧ lilo

102.3 Manage shared libraries
Weight 1
Description Candidates should be able to determine the shared libraries that executable programs depend on and install them when necessary.
Key Knowledge Areas
‧ Identify shared libraries.
‧ Identify the typical locations of system libraries.
‧ Load shared libraries.
The following is a partial list of the used files, terms and utilities:
‧ ldd
‧ ldconfig
‧ /etc/ld.so.conf
‧ LD_LIBRARY_PATH

102.4 Use Debian package management
Weight 3
Description Candidates should be able to perform package management using the Debian package tools.
Key Knowledge Areas
‧ Install, upgrade and uninstall Debian binary packages.
‧ Find packages containing specific files or libraries which may or may not be installed.
‧ Obtain package information like version, content, dependencies, package integrity and installation status (whether or not the package is installed).
The following is a partial list of the used files, terms and utilities:
‧ /etc/apt/sources.list
‧ dpkg
‧ dpkg-reconfigure
‧ apt-get
‧ apt-cache
‧ aptitude

102.5 Use RPM and YUM package management
Weight 3
Description Candidates should be able to perform package management using RPM and YUM tools.
Key Knowledge Areas
‧ Install, re-install, upgrade and remove packages using RPM and YUM.
‧ Obtain information on RPM packages such as version, status, dependencies, integrity and signatures.
‧ Determine what files a package provides, as well as find which package a specific file comes from.
The following is a partial list of the used files, terms and utilities:
‧ rpm
‧ rpm2cpio
‧ /etc/yum.conf
‧ /etc/yum.repos.d/
‧ yum
‧ yumdownloader

Topic 103: GNU and Unix Commands

103.1 Work on the command line
Weight 4
Description Candidates should be able to interact with shells and commands using the command line. The objective assumes the bash shell.
Key Knowledge Areas
‧ Use single shell commands and one line command sequences to perform basic tasks on the command line.
‧ Use and modify the shell environment including defining, referencing and exporting environment variables.
‧ Use and edit command history.
‧ Invoke commands inside and outside the defined path.
The following is a partial list of the used files, terms and utilities:
‧ .
‧ bash
‧ echo
‧ env
‧ exec
‧ export
‧ pwd
‧ set
‧ unset
‧ man
‧ uname
‧ history

103.2 Process text streams using filters
Weight 3
Description Candidates should should be able to apply filters to text streams.
Key Knowledge Areas
‧ Send text files and output streams through text utility filters to modify the output using standard UNIX commands found in the GNU textutils package.
The following is a partial list of the used files, terms and utilities:
‧ cat
‧ cut
‧ expand
‧ fmt
‧ head
‧ od
‧ join
‧ nl
‧ paste
‧ pr
‧ sed
‧ sort
‧ split
‧ tail
‧ tr
‧ unexpand
‧ uniq
‧ wc

103.3 Perform basic file management
Weight 4
Description Candidates should be able to use the basic Linux commands to manage files and directories.
Key Knowledge Areas
‧ Copy, move and remove files and directories individually.
‧ Copy multiple files and directories recursively.
‧ Remove files and directories recursively.
‧ Use simple and advanced wildcard specifications in commands.
‧ Using find to locate and act on files based on type, size, or time.
‧ Usage of tar, cpio and dd.
The following is a partial list of the used files, terms and utilities:
‧ cp
‧ find
‧ mkdir
‧ mv
‧ ls
‧ rm
‧ rmdir
‧ touch
‧ tar
‧ cpio
‧ dd
‧ file
‧ gzip
‧ gunzip
‧ bzip2
‧ file globbing

103.4 Use streams, pipes and redirects
Weight 4
Description Candidates should be able to redirect streams and connect them in order to efficiently process textual data. Tasks include redirecting standard input, standard output and standard error, piping the output of one command to the input of another command, using the output of one command as arguments to another command and sending output to both stdout and a file.
Key Knowledge Areas
‧ Redirecting standard input, standard output and standard error.
‧ Pipe the output of one command to the input of another command.
‧ Use the output of one command as arguments to another command.
‧ Send output to both stdout and a file.
The following is a partial list of the used files, terms and utilities:
‧ tee
‧ xargs

103.5 Create, monitor and kill processes
Weight 4
Description Candidates should be able to perform basic process management.
Key Knowledge Areas
‧ Run jobs in the foreground and background.
‧ Signal a program to continue running after logout.
‧ Monitor active processes.
‧ Select and sort processes for display.
‧ Send signals to processes.
The following is a partial list of the used files, terms and utilities:
‧ &
‧ bg
‧ fg
‧ jobs
‧ kill
‧ nohup
‧ ps
‧ top
‧ free
‧ uptime
‧ killall

103.6 Modify process execution priorities
Weight 2
Description Candidates should should be able to manage process execution priorities.
Key Knowledge Areas
‧ Know the default priority of a job that is created.
‧ Run a program with higher or lower priority than the default..
‧ Change the priority of a running process.
The following is a partial list of the used files, terms and utilities:
‧ nice
‧ ps
‧ renice
‧ top

103.7 Search text files using regular expressions
Weight 2
Description Candidates should be able to manipulate files and text data using regular expressions. This objective includes creating simple regular expressions containing several notational elements. It also includes using regular expression tools to perform searches through a filesystem or file content.
Key Knowledge Areas
‧ Create simple regular expressions containing several notational elements.
‧ Use regular expression tools to perform searches through a filesystem or file content.
The following is a partial list of the used files, terms and utilities:
‧ grep
‧ egrep
‧ fgrep
‧ sed
‧ regex(7)

103.8 Perform basic file editing operations using vi
Weight 3
Description Candidates should be able to edit text files using vi. This objective includes vi navigation, basic vi modes, inserting, editing, deleting, copying and finding text.
Key Knowledge Areas
‧ Navigate a document using vi.
‧ Use basic vi modes.
‧ Insert, edit, delete, copy and find text.
The following is a partial list of the used files, terms and utilities:
‧ vi
‧ /, ?
‧ h,j,k,l
‧ i, o, a
‧ c, d, p, y, dd, yy
‧ ZZ, :w!, :q!, :e!

Topic 104: Devices, Linux Filesystems, Filesystem Hierarchy Standard

104.1 Create partitions and filesystems
Weight 2
Description Candidates should be able to configure disk partitions and then create filesystems on media such as hard disks. This includes the handling of swap partitions.
Key Knowledge Areas
‧ Use various mkfs commands to set up partitions and create various filesystems such as:
o ext2
o ext3
o xfs
o reiserfs v3
o vfat
The following is a partial list of the used files, terms and utilities:
‧ fdisk
‧ mkfs
‧ mkswap

104.2 Maintain the integrity of filesystems
Weight 2
Description Candidates should be able to maintain a standard filesystem, as well as the extra data associated with a journaling filesystem.
Key Knowledge Areas
‧ Verify the integrity of filesystems.
‧ Monitor free space and inodes.
‧ Repair simple filesystem problems.
The following is a partial list of the used files, terms and utilities:
‧ du
‧ df
‧ fsck
‧ e2fsck
‧ mke2fs
‧ debugfs
‧ dumpe2fs
‧ tune2fs
‧ xfs tools (such as xfs_metadump and xfs_info)

104.3 Control mounting and unmounting of filesystems
Weight 3
Description Candidates should be able to configure the mounting of a filesystem.
Key Knowledge Areas
‧ Manually mount and unmount filesystems.
‧ Configure filesystem mounting on bootup.
‧ Configure user mountable removeable filesystems.
The following is a partial list of the used files, terms and utilities:
‧ /etc/fstab
‧ /media
‧ mount
‧ umount

104.4 Manage disk quotas
Weight 1
Description Candidates should be able to manage disk quotas for users.
Key Knowledge Areas
‧ Set up a disk quota for a filesystem.
‧ Edit, check and generate user quota reports.
The following is a partial list of the used files, terms and utilities:
‧ quota
‧ edquota
‧ repquota
‧ quotaon

104.5 Manage file permissions and ownership
Weight 3
Description Candidates should be able to control file access through the proper use of permissions and ownerships.
Key Knowledge Areas
‧ Manage access permissions on regular and special files as well as directories.
‧ Use access modes such as suid, sgid and the sticky bit to maintain security.
‧ Know how to change the file creation mask.
‧ Use the group field to grant file access to group members.
The following is a partial list of the used files, terms and utilities:
‧ chmod
‧ umask
‧ chown
‧ chgrp

104.6 Create and change hard and symbolic links
Weight 2
Description Candidates should be able to create and manage hard and symbolic links to a file.
Key Knowledge Areas
‧ Create links.
‧ Identify hard and/or softlinks.
‧ Copying versus linking files.
‧ Use links to support system administration tasks.
The following is a partial list of the used files, terms and utilities:
‧ ln

104.7 Find system files and place files in the correct location
Weight 2
Description Candidates should be thouroughly familiar with the Filesystem Hierarchy Standard (FHS), including typical file locations and directory classifications.
Key Knowledge Areas
‧ Understand the correct locations of files under the FHS.
‧ Find files and commands on a Linux system.
‧ Know the location and propose of impotant file and directories as defind in the FHS.
The following is a partial list of the used files, terms and utilities:
‧ find
‧ locate
‧ updatedb
‧ whereis
‧ which
‧ type
‧ /etc/updatedb.conf

2009 LPI Exam 102

2009 Exam 102: Detailed Objectives

This is a required exam for LPI certification Level 1. It covers basic skills for the Linux Professional that are common across all distributions of Linux.

IMPORTANT INFORMATION: These are the current 102 objectives, which are valid effective 2009-04-01.

Each objective is assigned a weighting value. The weights range roughly from 1 to 10 and indicate the relative importance of each objective. Objectives with higher weights will be covered in the exam with more questions.

Objectives: Exam 102

Topic 105: Shells, Scripting and Data Management

105.1 Customize and use the shell environment

Weight	4
Description	Candidates should be able to customize shell environments to meet users' needs. Candidates should be able to modify global and user profiles.

Key Knowledge Areas

• Set environment variables (e.g. PATH) at login or when spawning a new shell.
• Write BASH functions for frequently used sequences of commands.
• Maintain skeleton directories for new user accounts.
• Set command search path with the proper directory.

The following is a partial list of the used files, terms and utilities:

• /etc/profile
• env
• export
• set
• unset
• ~/.bash_profile
• ~/.bash_login
• ~/.profile
• ~/.bashrc
• ~/.bash_logout
• function
• alias
• lists

105.2 Customize or write simple scripts

Weight	4
Description	Candidates should be able to customize existing scripts, or write simple new BASH scripts.

Key Knowledge Areas

• Use standard sh syntax (loops, tests).
• Use command substitution.
• Test return values for success or failure or other information provided by a command.
• Perform conditional mailing to the superuser.
• Correctly select the script interpreter through the shebang (#!) line.
• Manage the location, ownership, execution and suid-rights of scripts.

The following is a partial list of the used files, terms and utilities:

• for
• while
• test
• if
• read
• seq

105.3 SQL data management

Weight	2
Description	Candidates should be able to query databases and manipulate data using basic SQL commands. This objective includes performing queries involving joining of 2 tables and/or subselects.

Key Knowledge Areas

• Use of basic SQL commands.
• Perform basic data manipulation.

The following is a partial list of the used files, terms and utilities:

• insert
• update
• select
• delete
• from
• where
• group by
• order by
• join

Topic 106: User Interfaces and Desktops

106.1 Install and configure X11

Weight	2
Description	Candidates should be able to install and configure X and an X font server.

Key Knowledge Areas

• Verify that the video card and monitor are supported by an X server.
• Install and configure an X font server.
• Basic understanding and knowledge of the X Window configuration file.

The following is a partial list of the used files, terms and utilities:

• /etc/X11/xorg.conf
• xhost
• DISPLAY
• xwininfo
• xdpyinfo
• X

106.2 Setup a display manager

Weight	2
Description	Candidates should be able setup and customize a display manager. This objective covers the display managers XDM (X Display Manger), GDM (Gnome Display Manager) and KDM (KDE Display Manager).

Key Knowledge Areas

• Turn the display manager on or off.
• Change the display manager greeting.
• Change default color depth for the display manager.
• Configure display managers for use by X-stations.

The following is a partial list of the used files, terms and utilities:

• /etc/inittab
• xdm configuration files
• kdm configuration files
• gdm configuration files

106.3 Accessibility

Weight	1
Description	Demonstrate knowledge and awareness of accessibility technologies.

Key Knowledge Areas

• Keyboard Accessibility Settings (AccessX?)
• Visual Settings and Themes
• Assistive Technology (ATs)

The following is a partial list of the used files, terms and utilities:

• Sticky/Repeat Keys
• Slow/Bounce/Toggle Keys
• Mouse Keys
• High Contrast/Large Print Desktop Themes
• Screen Reader
• Braille Display
• Screen Magnifier
• On-Screen Keyboard
• Gestures (used at login, for example gdm)
• Orca
• GOK
• emacspeak

Topic 107: Administrative Tasks

107.1 Manage user and group accounts and related system files

Weight	5
Description	Candidates should be able to add, remove, suspend and change user accounts.

Key Knowledge Areas

• Add, modify and remove users and groups.
• Manage user/group info in password/group databases.
• Create and manage special purpose and limited accounts.

The following is a partial list of the used files, terms and utilities:

• /etc/passwd
• /etc/shadow
• /etc/group
• /etc/skel
• chage
• groupadd
• groupdel
• groupmod
• passwd
• useradd
• userdel
• usermod

107.2 Automate system administration tasks by scheduling jobs

Weight	4
Description	Candidates should be able to use cron or anacron to run jobs at regular intervals and to use at to run jobs at a specific time.

Key Knowledge Areas

• Manage cron and at jobs.
• Configure user access to cron and at services.

The following is a partial list of the used files, terms and utilities:

• /etc/cron.{d,daily,hourly,monthly,weekly}
• /etc/at.deny
• /etc/at.allow
• /etc/crontab
• /etc/cron.allow
• /etc/cron.deny
• /var/spool/cron/*
• crontab
• at
• atq
• atrm

107.3 Localisation and internationalisation

Weight	3
Description	Candidates should be able to localize a system in a different language than English. As well, an understanding of why LANG=C is useful when scripting.

Key Knowledge Areas

• Locale settings.
• Timezone settings.

The following is a partial list of the used files, terms and utilities:

• /etc/timezone
• /etc/localtime
• /usr/share/zoneinfo
• Environment variables:
• LC_*
• LC_ALL
• LANG
• /usr/bin/locale
• tzselect
• tzconfig
• date
• iconv
• UTF-8
• ISO-8859
• ASCII
• Unicode

Topic 108: Essential System Services

108.1 Maintain system time

Weight	3
Description	Candidates should be able to properly maintain the system time and synchronize the clock via NTP.

Key Knowledge Areas

• Set the system date and time.
• Set the hardware clock to the correct time in UTC.
• Configure the correct timezone.
• Basic NTP configuration.
• Knowledge of using the pool.ntp.org service

The following is a partial list of the used files, terms and utilities:

• /usr/share/zoneinfo
• /etc/timezone
• /etc/localtime
• /etc/ntp.conf
• date
• hwclock
• ntpd
• ntpdate
• pool.ntp.org

108.2 System logging

Weight	2
Description	Candidates should be able to configure the syslog daemon. This objective also includes configuring the logging daemon to send log output to a central log server or accept log output as a central log server.

Key Knowledge Areas

• syslog configuration files
• syslog
• standard facilities, priorities and actions

The following is a partial list of the used files, terms and utilities:

• syslog.conf
• syslogd
• klogd
• logger

108.3 Mail Tranfer Agent (MTA) basics

Weight	3
Description	Candidates should be aware of the commonly available MTA programs and be able to perform basic forward and alias configuration on a client host. Other configuration files are not covered.

Key Knowledge Areas

• Create e-mail aliases.
• Configure e-mail forwarding.
• Knowledge of commonly available MTA programs (postfix, sendmail, qmail, exim) (no configuration)

The following is a partial list of the used files, terms and utilities:

• ~/.forward
• sendmail emulation layer commands
• newaliases
• mail
• mailq
• postfix
• sendmail
• exim
• qmail

108.4 Manage printers and printing

Weight	2
Description	Candidates should be able to manage print queues and user print jobs using CUPS and the LPD compatibility interface.

Key Knowledge Areas

• Basic CUPS configuration (for local and remote printers).
• Manage user print queues.
• Troubleshoot general printing problems.
• Add and remove jobs from configured printer queues.

The following is a partial list of the used files, terms and utilities:

• CUPS configuration files, tools and utilities
• /etc/cups
• lpd legacy interface (lpr, lprm, lpq)

Topic 109: Networking Fundamentals

109.1 Fundamentals of internet protocols

Weight	4
Description	Candidates should demonstrate a proper understanding of TCP/IP network fundamentals.

Key Knowledge Areas

• Demonstrate an understanding network masks.
• Knowledge of the differences between private and public "dotted quad" IP-Addresses.
• Setting a default route.
• Knowledge about common TCP and UDP ports (20, 21, 22, 23, 25, 53, 80, 110, 119, 139, 143, 161, 443, 465, 993, 995).
• Knowledge about the differences and major features of UDP, TCP and ICMP.
• Knowledge of the major differences between IPv4 and IPV6.

The following is a partial list of the used files, terms and utilities:

• /etc/services
• ftp
• telnet
• host
• ping
• dig
• traceroute
• tracepath

109.2 Basic network configuration

Weight	4
Description	Candidates should be able to view, change and verify configuration settings on client hosts.

Key Knowledge Areas

• Manually and automatically configure network interfaces
• Basic TCP/IP host configuration.

The following is a partial list of the used files, terms and utilities:

• /etc/hostname
• /etc/hosts
• /etc/resolv.conf
• /etc/nsswitch.conf
• ifconfig
• ifup
• ifdown
• route
• ping

109.3 Basic network troubleshooting

Weight	4
Description	Candidates should be able to troubleshoot networking issues on client hosts.

Key Knowledge Areas

• Manually and automatically configure network interfaces and routing tables to include adding, starting, stopping, restarting, deleting or reconfiguring network interfaces.
• Change, view, or configure the routing table and correct an improperly set default route manually.
• Debug problems associated with the network configuration.

The following is a partial list of the used files, terms and utilities:

• ifconfig
• ifup
• ifdown
• route
• host
• hostname
• dig
• netstat
• ping
• traceroute

109.4 Configure client side DNS

Weight	2
Description	Candidates should be able to configure DNS on a client host.

Key Knowledge Areas

• Demonstrate the use of DNS on the local system.
• Modify the order in which name resolution is done.

The following is a partial list of the used files, terms and utilities:

• /etc/hosts
• /etc/resolv.conf
• /etc/nsswitch.conf

Topic 110: Security

110.1 Perform security administration tasks

Weight	3
Description	Candidates should know how to review system configuration to ensure host security in accordance with local security policies.

Key Knowledge Areas

• Audit a system to find files with the suid/sgid bit set.
• Set or change user passwords and password aging information.
• Being able to use nmap and netstat to discover open ports on a system.
• Set up limits on user logins, processes and memory usage.
• Basic sudo configuration and usage.

The following is a partial list of the used files, terms and utilities:

• find
• passwd
• lsof
• nmap
• chage
• netstat
• sudo
• /etc/sudoers
• su
• usermod
• ulimit

110.2 Setup host security

Weight	3
Description	Candidates should know how to set up a basic level of host security.

Key Knowledge Areas

• Awareness of shadow passwords and how they work.
• Turn off network services not in use.
• Understand the role of TCP wrappers.

The following is a partial list of the used files, terms and utilities:

• /etc/nologin
• /etc/passwd
• /etc/shadow
• /etc/xinetd.d/*
• /etc/xinetd.conf
• /etc/inet.d/*
• /etc/inetd.conf
• /etc/inittab
• /etc/init.d/*
• /etc/hosts.allow
• /etc/hosts.deny

110.3 Securing data with encryption

Weight	3
Description	The candidate should be able to use puplic key techniques to secure data and communication.

Key Knowledge Areas

• Perform basic OpenSSH 2 client configuration and usage.
• Understand the role of OpenSSH? 2 server host keys
• Perform basic GnuPG configuration and usage.
• Understand SSH port tunnels (including X11 tunnels).

The following is a partial list of the used files, terms and utilities:

• ssh
• ssh-keygen
• ssh-agent
• ssh-add
• ~/.ssh/id_rsa and id_rsa.pub
• ~/.ssh/id_dsa and id_dsa.pub
• /etc/ssh/ssh_host_rsa_key and ssh_host_rsa_key.pub
• /etc/ssh/ssh_host_dsa_key and ssh_host_dsa_key.pub
• ~/.ssh/authorized_keys
• /etc/ssh_known_hosts
• gpg
• ~/.gnupg/*