Tuesday, May 17, 2011


REDHAT LINUX 5 Features:

1. 2.6x kernel (2.6.18)
a. 'uname -a' returns OS/Kernel information
Note: 'uname -a' returns the following useful info:
1. OS - Linux
2. Fully Qualified Domain Name (FQDN)
3. Kernel version - 2.6.18...
a. 2.6 = major version
b. .18 = minor version
c. anything else after the minor version indicates that the kernel was patched by the distributor
4. Date and time that the kernel was compiled

2. Supports multiple versions:
a. Basic - Red Hat Enterprise Linux Server
a1. supports 2 physical (Socket) CPUs
a2. Up to 4 virtual guests

b. Advanced Platform
b1. supports unlimited physical CPUs
b2. supports unlimited virtual guests

Note: Virtualization limits pertain to the virtualization technology included with Red Hat Enterprise Linux. NOT third-party software (VMWare)

3. Supports the following platforms:
a. Intel 32/64-bits
b. AMD 32/64-bits
c. IBM - POWER and z-series, S/390

Note: Memory limitation is based on hardware

Note: Common uses of the various versions of RHEL
1. RHEL Basic Version
a. File & Print
b. Web server
c. Infrastructure server (DHCP, DNS, Proxy, etc.)

2. RHEL Advanced Version
a. Application server (Apache Tomcat, JBOSS, Weblogic, WebSphere, etc.)
b. Database server (MySQL, PostgreSQL, Oracle, Ingres, etc.)
c. Clustering