software installation

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System Administration

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Key Knowledge Areas
Use Source form
Use Binary form
Install, upgrade and uninstall binary packages.
Linux software installation
Linux software installation
Terms and Utilities
compiling
gcc
make
./configure
rpm
deb
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Linux software installation
Software is delivered in one of two manners:
•Source form
requires compiling
•Binary form
generally wrapped up in a package
Delivery formats
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Both formats have advantages and disadvantages
•Compiling from source can provide higher performing machine code.
It gives option of selecting features and configurations available at compile time.
•Pre-compiled software is easier - alleviates the (possible) headaches of compiling,
If distributed in a package format, provides built-in management functionality.

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Linux software installation
Compiling from source can be tricky.
1st
: Development tools and packages must be installed most importantly:
gcc and make.
•gcc: GNU C Compiler.
The de facto compiler for open source software.
•make: GNU Make.
Development tool which uses rules-based configuration syntax to determine and run all of
necessary commands needed to build a software project.
Compiling
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Basic steps for compiling a software package:
•Download the source tarball
•cd into the extracted directory
•Read the INSTALL and/or README file, follow directions
•./configure
•make
•make install

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Linux software installation
Installing a software package is straight forward.
There are a few different package formats. The two most popular are:
•rpm: Redhat Package Manager
•deb: Debian package
Both have similar functionality and capability.
Learning the command syntax is about all that is needed for proficiency.
packages
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Linux software installation
RPM’s provide full software packaging features:
•pre-install scripts, post-install scripts,
•dependencies, meta information,
•an installed software database, etc
RPM system maintains a database of all installed software on a machine
- useful for tracking and update, dependency verification and software managem.
RPM
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rpm Redhat Package Manager tool.
interface to RPM system, performing queries, installs, upgrades, uninstalls and general
database maintenance operations.
-i: install given package; -q: query database; -e: erase given package from system
yum Yellowdog Updater Modified.
•Supports package installation over the network through repositories.
•RPM backend
•Simple interface
View Slides: 101-2.4b Use Debian package management and 101-2.5 Use RPM and YUM package management

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Fim de sessão
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