linux-Basics-Day 16th

1. Backup

Mv/etc/yum.repos.d/centos-base.repo/etc/yum.repos.d/centos-base.repo.backup

2, download the new Centos-base.repo to/etc/yum.repos.d/

CentOS 5

Wget-o/etc/yum.repos.d/centos-base.repo Http://mirrors.aliyun.com/repo/Centos-5.repo

Or

Curl-o/etc/yum.repos.d/centos-base.repo Http://mirrors.aliyun.com/repo/Centos-5.repo

CentOS 6

Wget-o/etc/yum.repos.d/centos-base.repo Http://mirrors.aliyun.com/repo/Centos-6.repo

Or

Curl-o/etc/yum.repos.d/centos-base.repo Http://mirrors.aliyun.com/repo/Centos-6.repo

CentOS 7

Wget-o/etc/yum.repos.d/centos-base.repo Http://mirrors.aliyun.com/repo/Centos-7.repo

3. After running Yum Makecache generate cache

The Yum command itself can be used to download a RPM package, and the standard Yum command provides a--downloadonly (download only) option to achieve this purpose.

If you want to download a package to a specified directory (for example,/tmp):

Yum Install--downloadonly--downloaddir=/tmp <package-name>

Package Compilation Installation:

TESTAPP-VERSION-RELEASE.SRC.RPM---after installation, use the Rpmbuild command to make the RPM package in binary format, and then install it;

Source code----preprocessing----compile (GCC)------Execute

Source Code organization format:

Multiple files: Between the code in the file, there is likely to be a cross-file dependency;

C, C + +: Make (Configure--makefile.in--Makefile)

Java:maven

C Code compilation installation three steps:

./configure:

(1) Pass the parameter through the option, specify enable feature, install path, etc., refer to User's designation and makefile.in file generation makefile when executing;

(2) Check the external environment of dependence;

Make

Build the application according to the makefile file;

Make install

Development tools:

AUTOCONF: Generate Configure Script

Automake: Generate makefile.in

Recommendation: View Install,readme before installation

Source code acquisition of open source program:

Official self-built site:

Apache.org (ASF)

mariadb.org

...

Code hosting:

SourceForge

Github.com

Code.google.com

C + +: gcc (GNU c complier)

Compile C source code:

Premise: Provide development tools and development environment

Development tools: Make, GCC, etc.

Development environment: Development Library, header file

GLIBC: Standard Library

To provide development components through "package groups"

CentOS 6: "Development Tools", "Server Platform development",

First Step: Configure script

Options: Specify the installation location, specify the enabled features

--help: Get the options it supports

Option Categories:

Installation path settings:

--prefix=/path/to/somewhere: Specifies the default installation location; default is/usr/local/

--sysconfdir=/path/to/somewhere: Configuration file installation location;

System types:

Optional Features: Optional Features

--disable-feature

--enable-feature[=arg]

Optional Packages: Optional Package

--with-package[=arg]

--without-package

Step Two: Make

Step Three: Make install

Post-installation configuration:

(1) Export the binary program directory to the PATH environment variable;

Edit File/etc/profile.d/name.sh

Export Path=/path/to/bin: $PATH

(2) Export Library file path

Edit/etc/ld.so.conf.d/name.conf

Add a new library file in the same directory as this file;

To have the system regenerate the cache:

Ldconfig [-v]

(3) Export header file

Implemented in a link-based manner:

Ln-sv

(4) Export Help manual

Edit/etc/man.config File

Add a Manpath

linux-Basics-Day 16th