|Home||Switchboard||Unix Administration||Red Hat||TCP/IP Networks||Neoliberalism||Toxic Managers|
May the source be with you, but remember the KISS principle ;-)
Bigger doesn't imply better. Bigger often is a sign of obesity, of lost control, of overcomplexity, of cancerous cells
|News||Certifications||Recommended links||Lecture notes for RHCSA certification for RHEL 7||Curriculum||Reference||Reviews||Notes on RHCSA Certification for RHEL 7|
|Understanding and using essential tools||Access a shell prompt and issue commands with correct syntax||Finding Help||Managing files in RHEL||Working with hard and soft links||Working with archives and compressed files||Using the Midnight Commander as file manager||Text files processing||Using redirection and pipes|
|Use grep and extended regular expressions to analyze text files||Finding files and directories; mass operations on files||Connecting to the server via ssh, using multiple consoles and screen command||RHCSA: Managing local users and groups||RHCSA: Introduction to Unix permissions model||Introduction to Process Management||Configuring network in RHEL7||Installation and configuration of KVM in RHEL7|
|Managing Software Packages with yum and rpm||Using yum||Using rpm|
|The tar pit of Red Hat overcomplexity||Systemd||Red Hat history||Sysadmin Horror Stories||RHEL7 documentation||Tips||Unix History with some Emphasis on Scripting||Humor||Etc|
The default utility used to manage software packages on Red Hat Enterprise Linux is yum (Yellowdog update manager). Yum is written in Python and works with repositories, which are online connection of software packages, assessable via HTTP and HTTPS.
All "standard" software on RHEL is provided in the RPM (Red Hat Package Manager) format. This cpio based format which is enhanced to provide package metadata as well.
Repositories can be Red Hat maintenance or local clones. In both cases patching of the servers, which is the most frequently used operation for production servers is done with yum.
The main advantage of yum over older rpm utility is that it resolves package dependencies (it it can; which is not given due to package hell phenomenon adamant in RHEL). Dependencies typically are connected with libraries as very few executables in RHEL are statically links. Even bash is not statically links which is blunder on the part of Red Hat. This means that to is path to libraries is not available you OS became inoperable. The simplest way to provide in RHEL 7 is to delete symbolic links existing in root directory.
Dependencies are specified within RPM format and are extracted by YUM. The yum command then try to find them in the repositories configured on this system. It finds them it fetches the dependencies automatically. If all goes well you will see the list of the dependencies that will be installed. If some dependencies are not found you are in troubles. For system packages this happens rarely but for custom packages is a real problem.
Red Hat repositories are assessable only for registered instances on RHEL. The amount of repositories available depends on your subscription. Only after registering with RHN, you can install software packages from RHEL repositories. If you are using CentOS, you get access to the CentOS repositories automatically: they are configured during installation and can be used immediately without any registration.
Note that repositories are specific to an version of RHEL. Moreover using CentOS repositories in RHEL installation also creates problems. It is not recommended to add CentOS repositories to an RHEL server. If you want to provide additional software should add the EPEL (Extra Packages for Enterprise Linux) and Extra repositories. On how to add EPEL repositories see https://fedoraproject.org/wiki/EPEL for more information.For a system administrator performing software installation and maintenance, the use of package management rather than manual building has advantages such as simplicity, consistency and the ability for these processes to be automated and non-interactive.
When working with RPM packages directly, it makes sense to understand how the RPM filename is composed. A typical RPM filename looks like
This name consists of several components:
Google matched content
RPM Package Manager - Wikipedia
Software repository - Wikipedia
Groupthink : Two Party System as Polyarchy : Corruption of Regulators : Bureaucracies : Understanding Micromanagers and Control Freaks : Toxic Managers : Harvard Mafia : Diplomatic Communication : Surviving a Bad Performance Review : Insufficient Retirement Funds as Immanent Problem of Neoliberal Regime : PseudoScience : Who Rules America : Neoliberalism : The Iron Law of Oligarchy : Libertarian Philosophy
War and Peace : Skeptical Finance : John Kenneth Galbraith :Talleyrand : Oscar Wilde : Otto Von Bismarck : Keynes : George Carlin : Skeptics : Propaganda : SE quotes : Language Design and Programming Quotes : Random IT-related quotes : Somerset Maugham : Marcus Aurelius : Kurt Vonnegut : Eric Hoffer : Winston Churchill : Napoleon Bonaparte : Ambrose Bierce : Bernard Shaw : Mark Twain Quotes
Vol 25, No.12 (December, 2013) Rational Fools vs. Efficient Crooks The efficient markets hypothesis : Political Skeptic Bulletin, 2013 : Unemployment Bulletin, 2010 : Vol 23, No.10 (October, 2011) An observation about corporate security departments : Slightly Skeptical Euromaydan Chronicles, June 2014 : Greenspan legacy bulletin, 2008 : Vol 25, No.10 (October, 2013) Cryptolocker Trojan (Win32/Crilock.A) : Vol 25, No.08 (August, 2013) Cloud providers as intelligence collection hubs : Financial Humor Bulletin, 2010 : Inequality Bulletin, 2009 : Financial Humor Bulletin, 2008 : Copyleft Problems Bulletin, 2004 : Financial Humor Bulletin, 2011 : Energy Bulletin, 2010 : Malware Protection Bulletin, 2010 : Vol 26, No.1 (January, 2013) Object-Oriented Cult : Political Skeptic Bulletin, 2011 : Vol 23, No.11 (November, 2011) Softpanorama classification of sysadmin horror stories : Vol 25, No.05 (May, 2013) Corporate bullshit as a communication method : Vol 25, No.06 (June, 2013) A Note on the Relationship of Brooks Law and Conway Law
Fifty glorious years (1950-2000): the triumph of the US computer engineering : Donald Knuth : TAoCP and its Influence of Computer Science : Richard Stallman : Linus Torvalds : Larry Wall : John K. Ousterhout : CTSS : Multix OS Unix History : Unix shell history : VI editor : History of pipes concept : Solaris : MS DOS : Programming Languages History : PL/1 : Simula 67 : C : History of GCC development : Scripting Languages : Perl history : OS History : Mail : DNS : SSH : CPU Instruction Sets : SPARC systems 1987-2006 : Norton Commander : Norton Utilities : Norton Ghost : Frontpage history : Malware Defense History : GNU Screen : OSS early history
The Peter Principle : Parkinson Law : 1984 : The Mythical Man-Month : How to Solve It by George Polya : The Art of Computer Programming : The Elements of Programming Style : The Unix Haterís Handbook : The Jargon file : The True Believer : Programming Pearls : The Good Soldier Svejk : The Power Elite
Most popular humor pages:
Manifest of the Softpanorama IT Slacker Society : Ten Commandments of the IT Slackers Society : Computer Humor Collection : BSD Logo Story : The Cuckoo's Egg : IT Slang : C++ Humor : ARE YOU A BBS ADDICT? : The Perl Purity Test : Object oriented programmers of all nations : Financial Humor : Financial Humor Bulletin, 2008 : Financial Humor Bulletin, 2010 : The Most Comprehensive Collection of Editor-related Humor : Programming Language Humor : Goldman Sachs related humor : Greenspan humor : C Humor : Scripting Humor : Real Programmers Humor : Web Humor : GPL-related Humor : OFM Humor : Politically Incorrect Humor : IDS Humor : "Linux Sucks" Humor : Russian Musical Humor : Best Russian Programmer Humor : Microsoft plans to buy Catholic Church : Richard Stallman Related Humor : Admin Humor : Perl-related Humor : Linus Torvalds Related humor : PseudoScience Related Humor : Networking Humor : Shell Humor : Financial Humor Bulletin, 2011 : Financial Humor Bulletin, 2012 : Financial Humor Bulletin, 2013 : Java Humor : Software Engineering Humor : Sun Solaris Related Humor : Education Humor : IBM Humor : Assembler-related Humor : VIM Humor : Computer Viruses Humor : Bright tomorrow is rescheduled to a day after tomorrow : Classic Computer Humor
The Last but not Least Technology is dominated by two types of people: those who understand what they do not manage and those who manage what they do not understand ~Archibald Putt. Ph.D
Copyright © 1996-2018 by Dr. Nikolai Bezroukov. www.softpanorama.org was initially created as a service to the (now defunct) UN Sustainable Development Networking Programme (SDNP) in the author free time and without any remuneration. This document is an industrial compilation designed and created exclusively for educational use and is distributed under the Softpanorama Content License. Original materials copyright belong to respective owners. Quotes are made for educational purposes only in compliance with the fair use doctrine.
FAIR USE NOTICE This site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner. We are making such material available to advance understanding of computer science, IT technology, economic, scientific, and social issues. We believe this constitutes a 'fair use' of any such copyrighted material as provided by section 107 of the US Copyright Law according to which such material can be distributed without profit exclusively for research and educational purposes.
This is a Spartan WHYFF (We Help You For Free) site written by people for whom English is not a native language. Grammar and spelling errors should be expected. The site contain some broken links as it develops like a living tree...
|You can use PayPal to make a contribution, supporting development of this site and speed up access. In case softpanorama.org is down you can use the at softpanorama.info|
The statements, views and opinions presented on this web page are those of the author (or referenced source) and are not endorsed by, nor do they necessarily reflect, the opinions of the author present and former employers, SDNP or any other organization the author may be associated with. We do not warrant the correctness of the information provided or its fitness for any purpose.
Last modified: March 30, 2019