RPM package Management and Yum repository

Package Management:

Kernel Features: Process management, memory management, network protocol stack, driver 、...
Application:

Package Manager Features: Package, package management (install, upgrade, uninstall, query and verify)
Deb:debian
Rpm:redhat Package Manager
RPM is the package Manager

Components of the package:
Binaries:/bin,/sbin,//usr/bin,/usr/sbin,
Library files:/lib64,/usr/lib64
Configuration file:/etc
Help files: Manual, Info,

Package Manager:
Package: In a single archive file;
Installation:
Unloading:
Upgrade:
Inquire:
Check:

The legitimacy and completeness of the source;

RPM Package:
Rpmbuild:specs file

10:5, 3, 2

Subcontracting mechanism:
Testapp-version.tar.gz

Core Pack: Testapp-version
Support Package: Testapp-devel-version

VERSION:major.minor.release
Base-4.2.4.tar.gz

The naming mechanism for RPM packages:
name-version-release.arch.rpm
bash-4.2.4-1.el7.x86_64.rpm
bash-devel-4.2.4-1.el7.x86_64.rpm

RELEASE:RPM Release

Between packages and packages: There may be dependencies:
X--Y

RPM Database:/var/lib/rpm/

How to get the RPM package:
1, the release version of the package provided;
2, Fedora-epel
3, the official site of the project
4. Search Engine
http://rpmfind.net
http://rpm.pbone.net
http://pkgs.org

Equipment files for the CentOS identification disc:/dev/cdrom,

Implement package management based on RPM command:
Installation:
RPM {-i|--install} [install-options] package_file ...
-I.:
-V: Show detailed procedure,-VV,-VVV
-H:

Each RPM package is provided with one or more capabilities

--nodeps: Ignore dependency installation
--REPLACEPKGS: Reload Package

Upgrade:
RPM {-u|--upgrade} [install-options] package_file ...
RPM {-f|--freshen} [install-options] package_file ...

-UVH: If there is an older version of the package, upgrade it, or if not, install it;
-FVH: If there is an older version of the package, upgrade it, if not, do not install;

--nodeps
--oldpackage: Downgrade;
--force:

Unloading:
RPM {-e|--erase} [--nodeps] [--noscripts] [--notriggers] [--test] package_name ...

Inquire:
RPM {-q|--query} [select-options] [query-options]

Query options:
-QA: Query All packages that have been installed on this machine;
-qf/path/to/somefile: Query the file here is generated by which package installation;

-QC: query Specifies the configuration file that the package installation generates
-QD: Query the specified package to install the generated document
-qi: Query the information about the specified package;
-QL: A list of all files generated by the query package installation;
-Q--scripts: Query package-related scripts:
Preinstall: Pre-installation script
Postinstall: Post-installation script
Preuninstall: Pre-uninstall script
Postuninstall: Post-uninstallation script

-P: Query against the package files that are not installed;

         Checksum:
         rpm {-v|--verify} [select-options] [verify-options]
       S file Size differs
         M Mode Differs (includes permissions and file type)
         5 Digest (formerly MD5 SUM) differs
         D Device major/minor number mismatch
          L readlink (2) path mismatch
          U User ownership differs
         G Group ownership differs
         T mTime differs
          P capabilities differ

Package Check:
Source Legitimacy Verification: asymmetric encryption
Integrity verification: one-way encryption

Import Key: RPM--import/path/to/key_file
Check: Rpm-k/path/to/rpm_file

Yum:yellowdog Updater Modified

Yum repositories:
File server:
Ftp://hostname/PATH/TO/REPO
Http://hostname/PATH/TO/REPO
File:///PATH/TO/REPO

Configuration files for the Yum program:
/etc/yum.conf
Define global configuration: configurations that are applicable to all warehouses
/etc/yum.repos.d/*.repo
A file is typically used for a warehouse or a group of similar or related functions

Define a warehouse to point to:
[REPO_ID]
Name=
Baseurl=
# Mirrorlist=scheme://hostname/path/to/mirror_list_file
Enabled={1|0}
Gpgcheck={1|0}
gpgkey=
cost=

Define the warehouse to point to the available variables:
$releasever: Reference the major version number of the current system;
$basearch: The basic architecture of the current system;
i386, i486, i586, i686:i386

http://mirrors.magedu.com/CentOS/$releasever/os/$basearch

Yum command:
Yum [options] [command] [package ...]

Command:
Installation: Install
Uninstall: Remove
Upgrade: Update
Inquire:
Info
Search KEYWORD
List all|installed|availiable
Provides/path/to/somefile: Query for which package the specified file is installed to build
Reinstall: Reinstall
Downgrade: Downgrade
Cleanup cache: Clean [Packages | metadata | expire-cache | rpmdb | plugins | all]
Vivid Build Cache: Makecache

Package Group:
Grouplist
GroupInfo "Grp_name"
Groupinstall "Grp_name"
Groupremove "Grp_name"

Warehouse:
Repolist [all|enabled|disabled]
Repoinfo [all|enabled|disabled]

How to use a CD as a local repository:
Mount a disc to a directory
Define the warehouse and use file:/// to indicate its access path;

To create a local warehouse:
Yum Install Createrepo

createrepo/path/to/rpmfiles/

RPM package Management and Yum repository