The document provides an overview of various courses related to Red Hat Enterprise Linux, covering skills necessary for network services, systems administration, and certification tracks. It outlines key topics such as package management using RPM and YUM, dynamic host configuration protocol (DHCP), network file systems (NFS), Samba for file sharing, and FTP server configuration. Additionally, it emphasizes security and traffic management within networks, alongside the functionalities of the Apache HTTP server.

1. SUBMITTED BY:
SUMANT GARG
2909012
CSE 1 (A1)

2. RH253 arms students with
in-depth knowledge needed
to configure common Red
Hat Enterprise Linux
RH133 focuses on skills in network services. Network
systems administration on Red
Hat Linux, to a level where you and local security tasks are
can attach and configure a also topics of this course
The first course for both RHCT
workstation on an existing
and RHCE certification tracks, network. This course provides
RH033 is for who have never intensive hands-on training on
used Linux or UNIX, and who Red Hat Enterprise Linux, and it
have no prior command line prepare for the RHCT
experience in any other Certification .
operating system. You are
taught the basics of a Red Hat
Enterprise Linux environment,
and it prepares you for your
future role as a system
administrator.

3. Linux Distribution
Project
RPM
YUM
DHCP
NFS
SAMBA
FTP
APACHE (HTTP)

6. Redhat Package Management
To query what software packages have been installed
• $ rpm -qa
To query a software package
• $ rpm -q emacs
To install a software package
• $ rpm -i emacs-21.4-19.el5.i386.rpm
• Error: Failed dependencies:
Disadvantages
• Very primitive
• Have to resolve software dependencies manually

8.  Yellowdog Update, Modified
 To find out what software packages have been
installed on a system
• $ yum list
 Installed Packages
…
 gawk.i386 3.1.5-14.e15 installed
 gcc.i386 4.1.2-14.e15 installed
…
 Available Packages
…
 emacs.i386 21.4-19.e16 base
…

9.  To find out if nfs has been install
• $ yum list nfs
 To install nfs
• $ yum install nfs
 To remove nfs
• $ yum remove nfs

10. Class-full addressing
• Class A(1-127)
• Class B(128-191) Class-less addressing
• Class C(192-223)
• CIDR(Classless Inter-Domain
• Class D(224-239) Routing)
• Class E(240-255) • FLSM(Fixed Length Subnet Masking)
• VLSM(Variable Length Subnet
Masking)

12. Created by the Host
Configuration Working
Dynamic Host
Standard protocol Group of the Internet
Configuration Protocol
Engineering Task
Force (IETF)
Utilizing ports:
• 67 – connections to
server Uses client–server
Runs over UDP
• 68 – connections to client model
in general

13. • Extensions:
• Supports temporary allocation (“leases”) of
IP addresses
• DHCP client can acquire all IP configuration
parameters needed to operate
• DHCP is the preferred mechanism for
dynamic assignment of IP addresses
• DHCP can interoperate with BOOTP clients.
13

17. The Network File System (NFS) is a distributed file system that allows
users to access files and directories located on remote computers and
treat those files and directories as if they were local. For example,
users can use operating system commands to create, remove, read,
write, and set file attributes for remote files and directories.
NFS was developed by Sun Microsystems in 1994
NFS allows fill or partial file systems from other hosts to be mounted to
the local file system

18. NFS makes files on a remote host appear as part of the local
host’s file system
NFS allows you to centralize administration of disks instead of
duplicating directories on every system
Only the servers need to be backed up if clients do not store
data locally
Resources that need to be shared must be exported by the
server
Any file system or subset may be exported

19. Limited security
Clients and servers trust each other
unconditionally
Host names can be spoofed (a machine
claiming to be another)

20. Means making a local directory
of file available for mounting
The file is /etc/exports
over the network by NFS
clients
One line per resource NFS server maintain a table of
containing the path to the exported resources
directory to be exported • $ exportsfs #shows current exports
followed by a space separated table
• $ exprotsfs -a #exports all resources
list of hosts that may access in exports file
the resource followed by a
parenthesized list of options

24. Samba is an Open Source Suite, that provides seamless file and print
services to SMB/CIFS clients.
Samba is freely available.
With Samba, you can share a Linux file system with Windows and
vice versa.
You can also share printers connected to either Linux or a system
with Windows.
Samba enables a Linux or Unix server to function as a file server for
client PCs running Windows software.

25. •What is SMB?
•SMB stands for – Server Message Block.
•It is a protocol by which a lot of PC-related machines share
files and printers and other information such as lists of
available files and printers.
•Operating systems that support this natively include
Windows NT, OS/2, and Linux.
•What is CIFS?
•CIFS – Common Internet File System is a protocol that is
basically an updated SMB.

30. The File Transfer Protocol (FTP) is used as one of the most
common file server, which used to download/upload files
from/to web server over the Internet. Most web based download
sites use the built in FTP capabilities of web browsers and
therefore most server oriented operating systems usually
include an FTP server application as part of the software suite.
Linux is no exception.
This will show you how to make your Linux server into an FTP
server using the default Very Secure FTP Daemon (VSFTPD)
package included in RHEL 6.

31. Type -: System V-managed service
Package -: vsftpd
Daemon -: /usr/sbin/vsftpd
Script -: /etc/init.d/vsftpd
Ports -: 21 (ftp), 20 (ftp-data)
Configuration -: /etc/vsftpd/vsftpd.conf, /etc/vsftpd.ftpusers, /etc/pam.d/vsftpd
Log -: /var/log/xferlog
Related -: tcp_wrappers, ip_conntrack_ftp, ip_nat_ftp

33. Command Description
get filename Retrieve file from server
mget filename* Retrieve multiple files from server*
put filename Copy local file to server
mput filename* Copy multiple local files to server*
open server Begin login to server
bye / close / exit Logoff server
ls / dir List files in current remote dir on server
lcd Change local directory
cd Change remote directory
rhelp / remotehelp Lists commands the server accepts
* Sent to server as multiple command by User Protocol Interpreter

35. 1. Limit network traffic and increase network performance.
2. Provide traffic flow control.
3. Provide a basic level of security for network access.
4. Decide which types of traffic are forwarded or blocked at the
router interfaces. For example: Permit e-mail traffic to be routed, but
block all telnet traffic.
5. Allow an administrator to control what areas a client can access on
a network.
6. If ACLs are not configured on the router, all packets passing through
the router will be allowed onto all parts of the network.

38. The Apache HTTP Server Project is an effort to
develop and maintain an open-source HTTP
server for modern operating systems including
UNIX and Windows NT. The goal of this project
is to provide a secure, efficient and extensible
server that provides HTTP services in sync with
the current HTTP standards.
HTTP (Hypertext Transfer Protocol) server, or
a web server, is a network service that serves
content to a client over the web. This typically
means web pages, but any other documents can
be served as well.

39. Caching modules, that
is, mod_cache and mod_disk_cache.
Support for proxy load balancing, that is,
the mod_proxy_balancer module.
Support for large files on 32-bit architectures, allowing
the web server to handle files greater than 2GB.
Authentication and authorization support,