Linux-Day3-Installation Software

There are three ways to install software in Linux:

1.rpm # is equivalent to clicking on windows to install next step
 2.yum # is equivalent to one-click installation using xxx Software Center
 3. Source code compilation and installation # is equivalent to the Matrix (*^*)

rpm installation software

rpm(redhat package manager), red hat package manager.
The rpm software in Linux is interdependent.
Package names are usually package names + version numbers
Among them, the version number is generally divided into three levels.
For example:
apache package name: httpd-2.2.15-53.el6.centos.x86_64.rpm
2.2.15 stands for large version number, small version number, patch package (repair version)

rpm -ivh [package] #Install rpm packages. If dependent packages need to be installed, there will be an error message

rpm -e [package] #Unloading package

rpm -ql [Package name before version number] #Query the specified package installation directory

rpm -q [Package name before version number] #Query whether a package is installed

rpm -qa [Package name before version number] #Query all rpm packages installed locally

rpm -qa | grep [Fuzzy matching package name] #Fuzzy query about whether a package is installed

rpm -qa | wc -l #Statistics the number of all rpm packages installed locally

rpm -Uvh [package] #Upgrade package

rpm -qf [package] #Query which package a file belongs to

rpm -qi [package] #Display details of a software

yum software installation artifact

yum will help us automatically install dependency packages

yum install httpd #Installation software without interaction
yum install -y httpd #Installation software with interaction

service httpd restart #Restart apache service

In fact, yum installs or installs rpm packages, only to help us resolve dependencies.

The package installed by yum comes from our own yum source.
The Yum source is stored in / etc/yum.repos.d by default.

In fact, yum can also specify a CD, mobile hard disk as the source, so when we have a CD or mobile hard disk, we can not even get the package we want online.

service [Software Name] start # start a Software
 Restart # restart a software
 service [software name] stop  stop a software

The premise is that the software must be installed by yum or specified by itself.

Other operations of yum:

yum remove [Package name] #Using yum to remove a software, you can add the - y parameter

yum list #See how many packages are in the specified source

yum list | wc -l ##Statistics of the number of yum packages installed locally

yum search [Package name] #Search for packages in yum sources

yum update [Package name] #Upgrade a software to add - y parameters

Compilation and installation

Use the compiler to compile the source code of the package so that it can run.
Usually our commonly used Linux software packages are written in c/c++, so we need to use a compiler.

The common compilers are gcc[C language compiler], gcc-c++[C++ language compiler]

Source code packages must be downloaded on their own official websites.
After downloading, compile and install according to the documents provided by the official website.

Compile and install steps:

1. / configure - prefix = configuration
(2) make compilation [compiled according to machine environment and software environment],
makefile is generated after compilation
Makeinstall compiler will help you install

Why compile and install, why others recommend this
Because of the configuration and compilation process.
The most stable is the goal we expect to achieve.
Official Server in Formal Production Server, Official Server Running Online

lnmp is a script, compiled and installed.

Install httpd

wget -c
tar -zxvf httpd-2.4.25.tar.gz
cd httpd-2.4.25

yum install -y gcc gcc-c++  #Install the compiler required for compilation

./configure --prefix=/usr/local/apache2 #Notice that this step will make a mistake. Look at the following
echo $?    #To see if this step has been successfully executed, follow it up. 1 Error 0 Error

####Here is the part of installing the apr, which can be done ahead of time
cd ../  #Be careful to come out
wget -c
tar -zxvf apr-1.5.2.tar.gz
cd  apr-1.5.2
./configure --prefix=/usr/local/apr
make install

cd ../
wget -c
tar -zxvf apr-util-1.5.4.tar.gz
cd apr-util-1.5.4
./configure --prefix=/usr/local/apt-util --with-apr=/usr/local/apr/

make && make install    #There is no problem with the previous execution, but only later.

####Install pcre
wget -c
tar -zxvf pcre-8.39.tar.gz
cd pcre-8.39
./configure --prefix=/usr/local/pcre && make && make install
cd ../

cd httpd-2.4.25
##This is the complete configuration statement.
./configure --prefix=/usr/local/apache2 --with-apr=/usr/local/apr --with-apr-util=/usr/local/apr-util/ --with-pcre=/usr/local/pcre

##Designated file execution
$apache/bin/apachectl start #Open apache
$apache/bin/apachectl stop #Close apache
$apache/bin/apachectl restart #Restart apache

cp /usr/local/apache2/bin/apachectl /sbin   #Execution by command

##Add apache to the service to run
cp /usr/local/apache2/bin/apachectl /etc/rc.d/init.d/httpd

Tags: yum RPM Apache Linux

Posted on Sat, 30 Mar 2019 09:03:28 -0400 by mobtex