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IT120 Final Review. Final Exams Test Date and Time IT120-101 Friday 12 Dec 08, 08:00 a.m. IT120-102 Thursday 11 Dec 08, 08:00 a.m. IT120-103 Wednesday 10 Dec 08, 4:00 p.m. There is no retest or make-up date. Test will start on time and door will be closed. Do not be late. Final Review IT120.
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IT120 Final Review • Final Exams Test Date and Time • IT120-101 Friday 12 Dec 08, 08:00 a.m. • IT120-102 Thursday 11 Dec 08, 08:00 a.m. • IT120-103 Wednesday 10 Dec 08, 4:00 p.m. • There is no retest or make-up date. • Test will start on time and door will be closed. Do not be late.
Final Review IT120 • Attached are Chapters 1-9 Outlines from the yellow review sheets handed out in class. • Chapters 11-14 are from the take home questions from last week. If you completed and turned in the homework, it should cover all information in chapters 11 – 14. Remember the highlighted referenced material you were to mark in your textbook.
Curriculum Outline Review • 1.4.1 Common network operating systems • 1.4.2 Windows and Linux NOS Comparison • 1.4.4 Evaluating customer resources and requirements • 3.2.2 Physical versus logical topology • 5.3.4 Network Information Service (NIS) • 6.2.3 Windows 2000 and XP Operating Systems • 6.3.3 Linux Operating System • 7.4.1 Unable to boot from installation media • 7.1.5 Hardware requirements • 7.2.4 Disk partitions • 7.2.5 Partitioning a disk • 7.1.7 Identifying hardware using Device Manager • 7.2.7 Formatting the disk • 7.2.7 Formatting the disk • 8.1.1 Installing Windows 2000 • 8.1.2 Installation of OS add-on options • 8.3.1 Adding users • 8.3.2 Managing user accounts • 8.3.3 Functions and Permissions of the Administrator Account • 8.4.1 Creating and sharing folders • 8.4.3 Passwords and permissions • 8.5.1 Hypertext Transfer Protocol (HTTP) • 8.5.4 Stopping and Starting Services in Windows • 8.5.6 Printing in Windows 2000 • 8.5.7 Scripts • 9.1.4 Creating the Linux file system • 9.2.4 Configuring network settings • 9.4.1 Post-installation of applications and programs • 9.4.2 Creating Achieves and Basic makefile changes
Curriculum Outline Review con’t • 10.1.2 GUI interface • 10.1.3 CLI Interface • 10.1.5 VI Editor • 10.2.4 Creating groups and adding users to groups • 10.3.1 Creating/sharing directories • 10.3.3 Passwords and permissions • 10.3.6 Managing runlevels • 10.4.2 Starting, stopping, and restarting daemons • 10.4.10 Scripts • 10.4.2 Starting, stopping, and restarting daemons • 10.4.9 Printing in a Linux Environment • 11.3.1 Using fdisk, mkfs, and fsck • 11.3.3 Core dumps • 11.3.4 Assigning permissions for processes • 11.4.1 Disk management • 11.4.2 Memory usage • 11.4.4 Reviewing daily logs • 11.4.5 Checking resource usage on Windows 2000 and Windows XP • 12.2.1 Locating hardware drivers for Linux • 13.1.11 The dmesg command • 13.2.4 Using an emergency boot disk in Linux • 13.4.3 Using TCP/IP utilities • 13.4.3 Using TCP/IP utilities • 14.1.1 Accessing security needs • 14.1.3 Username and password standards • 14.1.4 Virus protection standards • 14.3.1 File encryption, auditing, and authentication • 14.4.1 Finding patches and upgrades • 14.5.5 Using a NOS as a firewall
1.4.1 Common Network Operating Systems • Common network Operating Systems Include
1.4.4 Evaluating Customer Resources and Requirements • When working in the networking field. You will often have to evaluate the needs of your employer. • You will be looking at what they require. Workstations, Servers, Dedicated Appliances, Customer Resources.
3.2.2 Physical vs. Logical Topology • Physical topology – The example in Figure shows the physical topology of a network, which refers to the layout of the devices and media. An example would be a floor map of a classroom. Laid out exactly. • Logical topology – The example in Figure shows the logical topology of a network, which refers to the paths that signals travel from one point on the network to another (that is, the way in which data accesses media and transmits packets across it). An example would be the network map in our classroom. It has crazy symbols and dotted lines that show the traffic of data over a network. Or the examples of a ring or buss topology in our books.
5.3.4 Network Information Service (NIS) • Nis is Linux’s `Directory Services. • Database, slaves, and Clients-Slaves contain copies of the database and clients retrieve info from the database and slaves. • Config-if doing so during the installation process, selest it when prompted and then select the NIS domain name and the IP address of the NIS server. Otherwise, one must use the linuxconf utility. • yppassword-changes the password associated with the user account username in the NIS database. • ypinit- sets up NIS maps on a NIS master server or slave server.Correct command Syntax is as follows: /usr/sbin/ypinit [ -o] [ -n ] [ -q] -m [ SlaveName ... ] /usr/sbin/ypinit -sMasterName The First command is used to Set up NIS on a NIS Master Server and the second command will set up NIS on an NIS Slave Server.
6.2.3 Windows 2000 and XP Operating Systems • Windows 2000 and XP: • They support plug and play technology. • They’re not really made for Servers. • Support FAT32 and NTFS file systems • Offers support for mobile users with APM and ACPI • Very secure networking with plenty of third-party applications to give you a hand. • The offline folders feature allows you to access documents even when not connected to a network. • IPP allows one to manage printers through a browser Interface. • Built-in defragmenters allow the user to keep their Hard drives intace and conserve space • Supports Kerberos Security • Xp has some features not in 2000, like more extensive support, better security, more user-friendly file sharing, better wireless network features, Remote Desktop Control, GUI improvements, and better multimedia support for movies, music, pictures, and the like.
6.3.3 Linux Operating System • Red Hat -Older, very influential, Introduced RPM • Mandrake-created as Red Hat for KDE, has own server config. And GUI installation processes. • Caldera, eDesktop and eServer – two releases, one for workstation, one for server. Very sophisticated GUI. RPM based and not derived from Red Hat • Debian GNU/Linux-Built specifically for non-profit use. Highly customizable. • Corel-Based on Debian, but more user friendly. Not all CLI commands Work. • PPC- Made for use with Power PC CPU. • Slackware-Entirely taxt based for UNIX enthusiasts. Only system that uses Tarballspacckage management. • Storm- Based on debian but easier to use, however less dependent on tools as Corel. • SuSe-Uses RPM,uses DVD-rom software to open packages, and for systems with a DVD-rom. • Turbo-Made from Red Hat, Just for Servers • Yellow Dog-runs on Power PC. For Macs, essentially. • LOAF-Linux on a floppy. Very small.
7.4.1 Unable to boot from installation media • Troubleshooting when the computer will not boot from a CD rom. Do the following: • Consult the system BIOS setup menu. A hotkey sequence will probably be needed and it varies from manufacturer to manufacturer. • Make sure the BIOS is capable of supporting and booting from a CD rom. • Check the CD documentation. • Make sure the disc is supported by the OS. • See if another system can boot from or read the CD. If they can, it’s probably the drive. • Check to make sure the disk is free of scratches and other nasty stuff like dust, fingerprints, and such. • Check the CD Drive itself, make sure everything’s hooked up correctly and the like, as well as Master/Slave configuration and cable select.
7.1.5 Hardware requirements • when a NOS is created there are system requirements that must be met these are the minimum requirements. When choosing a NOS version to install, verify that the key elements of the system hardware meet the minimum requirements of the NOS. These key areas are CPU type (architecture), CPU speed (measured in megahertz [MHz] or gigahertz [GHz]), amount of RAM, and amount of available hard disk space. NOS vendors create these minimum requirements so that administrators can build their machines for optimal use. To find the minimum requirements you can look on the NOS vendors website also sometimes the list will be on the cd/dvd containing the actual NOS.
7.2.4 Disk partitions • In order to efficiently use the storage space on a hard disk, the disk is divided into sections called partitions or slices. Each partition, or slice, is a logical division of the hard disk. A disk can have one or more partitions. Typically a network server is created with multiple partitions before the NOS is installed, this can allow the following advantages to the user: • Multiple operating systems can be installed on the same disk. • Data can be physically separated from the system files to provide security, file management, and/or fault tolerance. • A specific partition, called a swap partition, can be created in order to supplement the system RAM and enhance performance. • Each partition after creation must be formatted before use. A windows partition is give symbolic letters from the English alphabet beginning with the letter C and so according what position it was formatted in and if there are other drives such as a CD/DVD rom. • There are three types of partitions that can exist on a hard drive. A primary partition is the same as an original partition. Extended partitions are variations of a primary partition, which acts as a placeholder for logical partitions. Logical partitions are partitions that are created within the extended partitions. On any operating system, there can be up to four primary partitions or three primary partitions and one extended partition.
7.2.5 Partitioning a disk • Information about the number of partitions, their size, and their location on the disk is kept in the first sector of the disk. This information is called the partition table. Partition tables can conform to one of several formats, including DOS and BSD/Sun. On systems that use a DOS-type partition table, such as Windows and Linux, the first sector of the disk is sometimes called the Master Boot Record (MBR) or the Master Boot Sector. The partition table includes information that tells the OS which partitions are bootable. A bootable partition is a partition that contains an operating system. When manually defining partitions, a partition must be configured to be bootable in order to be able to boot from it. • FDISK: Most NOS installation software includes a program called FDISK. FDISK stands for fixed disk. FDISK programs are designed to manipulate the partition table of a hard disk. A FDISK program can be used to create partitions, delete partitions, and set partitions as "active". Linux provides a version of FDISK as well, although the version that Linux uses is fdisk, with all lowercase letters. The Linux version of fdisk is test-based as well but provides a more flexible means of partitioning a hard disk than does Microsoft version. • Linux Install-time tools: Linux provides its own tools that can be used when installing a Linux-only system. These are GUI tools that are much more easier to use than fdisk. This is probably the best way and easiest way to partition a Linux system. First Nondestructive Interactive Partitioning Splitting (FIPS) is included in the installation CD that come with most of the Linux distributions. FIPS is a large partitioning tool that can be used to split a FAT partition into two partitions. FIPS is most commonly used on Windows systems that need to make a separate partition to install Linux on. FIPS does this by first splitting the existing FAT partition. Then the user can delete that partition and installing Linux on that new partition • There are two rules that generally should be followed when portioning a hard drive. A good idea is to use a cross-platform partitioning tool like Partition Magic. As described before, this partitioning tool can be used to partition a hard drive for use with just about any operating system. If using a third-party partitioning tool is not an option then the next best idea is to use the partitioning tool that come with the OS. Linux and Windows 2000/XP come with their own partitioning tools that can be used during the installation of the OS.
7.1.7 Identifying hardware using Device Manager • Previously, the devices were installed only if the user installed the device drivers. Today, PCI-based plug-and-play is the new method. It is still easy to see which devices have not had drivers installed. In the Windows 2000 OS, the device will appear with a yellow question mark next to the device name in Device Manager • Windows 2000:In Windows 2000, the easiest way to identify if the hardware driver has not been installed is to look at the device and see if it has a question mark in a yellow circle next to it. This icon means Windows 2000 recognized the device but could not find a suitable driver for it. In Device Manager, the user has the option to update driver. The user can tell Windows 2000 to search the CD or the Internet for the most suitable driver. The user can also delete the driver and reboot the PC and Windows will prompt the user again to search for a suitable driver.
7.2.7 Formatting the disk Partitions can be formatted with various utilities, such as Windows FORMAT.EXE. When formatting a partition on a Windows NOS, choose between the following file systems: • New Technology File System (NTFS) (Recommended for network servers) • FAT32 • FAT
7.2.7 Formatting the disk Linux allows you to create different partition types, based on the file system they will use. • ext2 – An ext2 file system supports standard Unix file types (regular files, directories, symbolic links, etc). It provides the ability to assign long file names, up to 255 characters. Versions prior to Red Hat Linux 7.2 used ext2 file systems by default. • ext3 – The ext3 file system is based on the ext2 file system. Its main advantage over ext2 is its journaling capabilites. Using a journaling file system reduces time spent recovering a file system after a crash as there is no need to scan and check the file system. The ext3 file system is selected by default and is highly recommended. • physical volume (LVM) – Creating one or more physical volume (LVM) partitions allows you to create an LVM logical volume. • software RAID – Creating two or more software RAID partitions allows you to create a RAID device. For more information regarding RAID, • swap – Swap partitions are used to support virtual memory. In other words, data is written to a swap partition when there is not enough RAM to store the data your system is processing. • vfat – The VFAT file system is a Linux file system that is compatible with Microsoft Windows long filenames on the FAT file system.
8.1.1 Installing Windows 2000 There are a few things to consider before installing Windows 2000. First, check to make sure that the hardware is capable of running Windows 2000. Microsoft recommends that users observe the following requirements prior to installing the operating system: • Pentium 133 MHz or higher microprocessor • 64 MB RAM • 2 GB hard drive or partition with a minimum of 1 GB of free space • VGA monitor • 12X CD-ROM, minimum • Network card Understanding the Steps in Windows 2000 Installation • The Setup program • The Setup wizard • Installing Windows networking • Completing the Setup program
8.1.2 Installation of OS add-on options After successfully installing the Windows 2000 operating system, the user may need some features that are considered add-on options. For example, Internet Information Services (IIS) should be installed if the user will set up an FTP or web server. Most of these add-ons can be installed from the installation CD from which the operating system was initially installed. Other post-installation add-ons include service-packs or updates to the operating system that have been made since the installation CD was purchased. These can be downloaded and installed from the manufacturer website at any time.
8.3.1 Adding users Before logging on to any Windows 2000 client, a user account must first be created on the appropriate network server. This account will allow the user to log on to a specific network domain using the account information created by the system administrator. The task of creating this account in Windows 2000 is performed with the Computer Management tool. Select Start > Programs > Administrative Tools > Computer Management to display this window. The Computer Management tool allows a system administrator to manage all aspects of a particular computer, including authorized users, and in the case of a network server, the authorized users of a network domain. To create a new user for a local machine, expand the directory tree on the left to reveal the System Tools, Local Users and Groups. Click the Users icon to display the entire existing user accounts in the right half of the window. Under either the action or right-click, select New User… to display a screen that prompts for all the necessary account information. The User name is a required field. It cannot be longer than 20 characters in length, and cannot contain the symbols below. / \ [ ] : | < > + = ; , ? *. Both the Full name and Description are for informational purposes only and are not required. After entering all account information and pressing the Create button, the new user will be created and immediately log on to the computer with the user name and password specified.
8.3.2 Managing user accounts The Computer Management tool is the primary means for a system administrator to add and manage users in Windows 2000. These tasks should be much more intuitive in this GUI environment in comparison to a CLI such as Linux. Instead of memorizing command names, Windows 2000 users can carry out these operations in a number of ways, raging from simple menu selections to keyboard commands. The simplest user management technique is to right-click the user name listed in the right half of the Computer Management window and select the appropriate task from the menu. From here, the system administrator can instantly choose to Set Password, Delete, or Rename the user. Selecting Properties can also disable the account and checking the Account is disabled box. These and other user management options can be found by navigating the remaining menus of the window. Great care should be taken when using the Delete option since there is no way to undo such a change.
8.3.3 Functions and Permissions of the Administrator Account Typically speaking, when refering to any network operating system, like administrator account will have rights and permissions to control, configure, or change anything in the operating system. Windows uses a variety of different type of Administer accounts, which are designed to delegate authority to the various administrator responsibilities. This increases security because administrator functions will be delegated out to more than one person, based on the level of access they are given with the type of administrator account they have rights to. Usually the main administrator account will be assigned to one person, usually an IT manager or senior level IT engineer. Windows 2000 Professional automatically creates a built-in administrator account. Use the built-in Administrator account to manage the overall computer. If your computer is part of a domain, use the built-in Administrator account to manage the domain configuration. Tasks done using the Administrator account include creating and modifying user accounts and groups, managing security policies, creating printers, and assigning permissions and rights to user accounts to gain access to resources. There is also a built-in administrator group, which regular users can be added to temporarily in the event they need specific permissions to install or run a program for example.
8.3.3 Functions and Permissions of the Administrator Account (Continued) Some of the different types of Administrator account/groups are listed as follows. • Domain Admins – Windows automatically adds Domain Admins to the Administrators domain local group so that members of Domain Admins can perform administrative tasks on any computer anywhere in the domain. By default, the Administrator account is a member. • Enterprise Admins – You can add user accounts to Enterprise Admins for users who should have administrative control for the entire network. By default, the Administrators built-in local group for each domain is a member of the Enterprise Admins global group. By default, the Administrators account is a member.
8.4.1 Creating and sharing folders . Useful for administrators to allow users to share certain folders on network . Right Click - Select - New - Folder . Right Click - Select - Sharing - THEN Configure information on the Sharing Tab . ALSO** Administrators may Map Drives so that users can access various drives. . Administrators typically choose to give password information for users to login to the Mapped Drives
8.4.3 Passwords and permissions • User names and passwords are given to network users. This helps set security levels for different users, and helps to allow only the users with the Username/Password to access. • Passwords should be ATLEAST 5 CHARACTERS. It is always good for users to use Upper and Lower Case letters ALONG WITH allowed characters to make the password more complex and harder to figure out for others • Good Password: f!shngco94 (combo of Upper, lower, and additional characters) • Bad Password: fsh (TOO SMALL, easy to figure out, no mix of characters.) --------------------------------------------------------------------------------------------------------------------------------- • PERMISSIONS allow administrators to select what actions a User can or cannot perform on the NOS. Note** Different Users may need different levels of permissions. IE Operation Managers may have permissions for User Information, but not Financial Data. Where Financial accounts may not be able to view information not pertaining to financials. • Permission Types: • READ: ability to VIEW content of FILES. • WRITE: Allows the users to MODIFY CONTENT OF FILE • EXECUTE: Allows User to RUN or OPEN DIRECTORY
8.5.1 Hypertext Transfer Protocol (HTTP) • Hypertext Transfer Protocol (HTTP) services on Windows XP is the same as configuring HTTP services on Windows 2000. By enabling the HTTP service on a NOS, the computer becomes a web server capable of sending out information over the World Wide Web (WWW). • Activate the HTTP Services through IIS Internet Information Services (Goto control panel and select Add/Remove Programs, then Add Components) • To view HTTP Service go to the management console, select IIS, and then select properties for the Default Website under HTTP • Typically the IP address http://127.0.0.1, also known as the loopback IP Address, can be used on your computer to see if your Service/Server is working. • By default, Windows 2000 will display the file named "localstart.asp“ • Make sure to add any documents which need to be viewed to the DOCUMENTS in the HTTP service. (Just a note from class)
8.5.1 Hypertext Transfer Protocol (HTTP) • Configuring Hypertext Transfer Protocol (HTTP) services on Windows XP • computer becomes a web server capable of sending out information over the World Wide Web • these services are activated and configured through the use of the Internet Information Services • this tool displays the current computer and the list of available Internet services. • The HTTP web service is found here under the name Default Web Site. • Once this web service has been started, users can view the system default web page by submitting the address below to their web browser. http://127.0.0.1 • referred to as the "loopback" address. • It is a networking standard address that always points to the local computer.
8.5.4 Stopping and Starting Services in Windows • Windows provides a Services Management Control screen which lists all of the services available on the Windows operating system. • The services are displayed in alphabetical order by name. A description of what each service does is displayed to the right. • The services on the computer that are managed through this Computer Management utility is call the MMC. • Using the Services tab in the Windows 2000 MMC allows you to modularly start and stop any service running in Windows 2000. • For example, it is possible to manually stop the Windows 2000 client from using DHCP or DNS. • Another example would be if the server was a web or ftp server running IIS (Internet Information Services). Using the MMC, it is possible to manually stop or start the IIS server.
8.5.6 Printing in Windows 2000 • networks enable users to share expensive printing devices • a network can make an expensive high-speed printer accessible to many users as if it were directly attached to their own computers. • administrative control, users can select the service they need for a particular job. In this way, networks allow for a more efficient use • A print server is a computer dedicated to handling client print jobs in the most efficient manner. Since it handles requests from multiple clients, a print server is usually one of the most powerful computers on the network. • A powerful processor– • Adequate hard disk space– • Adequate memory – • When using printers that connect directly to the network, the print server "routes" print jobs to the proper printer. • Sharing a Local PrinterTo share a printer that is attached to the local computer, go to the Printers folder, which is accessible through the Control Panel, and then right-click, the printer name. Choose Sharing, click Shared as the option button, and then either enter a share name or accept the default..
8.5.7 Scripts • Windows 2000 can accommodate many types of scripting languages using its built-in Windows Script Host (WSH). • This component of Windows 2000 and XP enables users to create scripts using either the VBScript or JavaScript languages. • WSH can also recognize any other scripting language the user desires. When a text file is created, the user simply names the file with the appropriate file extension to indicate its scripting language to WSH. For example, a VBScript file would have a .vbs file extension, whereas a JavaScript file would end with the .js extension. Figure displays a file with a .vbs extension in Windows 2000. • When either script file is run, WSH handles the code based on these file extensions.
9.1.4 Creating the Linux file system • Pre-Installation Tasks • After specifying the proper parameters for the installation, partition the hard drive and choose which file system is to be on this Linux system. • Basically when Linux creates the file system, it is formatting the hard drive. This is the process in which the ext2, ext3, or Reiser file system will be written to the partition. • Low-Level and High-Level Formatting • There are two types of formatting that may be done. A Low-Level format redefines the physical sectors on the hard drive. A High-Level format will actually create or recreate the file system. Normally hard drives will be shipped with a low-level format; in most cases there is no need to format the disk. In Linux, using the fdformat command will perform a low-level format and the mkfs command will perform a high-level format.
9.2.4 Configuring network settings • During the installation, the option of configuring the client network settings and services will be displayed. This may be done after the installation but it is recommended to do so during the installation. • Normally the system will detect the network card. The steps to do this may be slightly different depending on the distribution of Linux that is being installed. At this point a prompt will be displayed for manually configuring the network settings such as the IP address, subnet mask, host name, DNS server, and default gateway. • It is equally important to be able to manually configure TCP/IP setting for a network interface card (NIC) after the installation is complete. • The ifconfig utility is the tool used to set up and configure the network card. • (example) - #ifconfig eth0 192.168.1.50 netmask 255.255.255.0
9.4.1 Post-installation of applications and programs • Red Hat Package Manager (RPM)RPM is the most popular type of package manager. Although created by Red Hat, RPM is supported by just about every major distribution of Linux. • RPM provides the necessary tools such as package databases that are needed to install and remove programs, however, not all applications or programs use RPM. • The package database is stored in the /var/lib/rpm directory. • Debian Package ManagerDebian packages are very similar to RPM packages. Debian contains a package database that has the same features as the RPM database, however, the Debian database is stored in the /var/lib/dpkg directory. The difference between Debian and RPM packages is that they are not interchangeable. Debian packages cannot be used on a distribution that supports RPM packages, and vice versus.
9.4.2 Creating Achieves and Basic makefile changes • Unfortunately, most of the software programs you’ll find aren’t in RPM package format. • The software packages that you get via anonymous FTP will virtually all be in the form of a compressed tar file. • If the file ends in .gz, it was compressed with the GNU gzip program. This is the most common file-compression format for Linux software packages. If the archive name ends with a .Z, it was compressed with the compress program. For example, the software package test.tar.gz is a tar archive that has been compressed with gzip. • The cpio command manipulates files called cpio archives. A cpio copies files into or out of a cpio or tar archive. • Makefiles are used for compiling programs and packages. In order to install some programs it is necessary to compile the binaries and library files. • There is a program called make which will let you automatically compile all of your source files by just typing make.
