Yum is too slow to bear? That's because you didn't do it

Preface

      yum It's a Fedora and RedHat as well as SUSE Medium Shell Front end package manager .
       be based on rpm Package management , Can be automatically downloaded from the specified server RPM Package and install , Dependency relationships can be handled automatically , And install all the dependent packages at once , No need to download again and again 、 install .
       We usually use yum install Command to install the software package of the relevant system online ,yum Installation can automatically handle package related dependencies , And install all the dependent packages at once . as everyone knows , Downloading software from foreign websites is very slow , And there are a lot of things that can't be downloaded . Therefore, some large domestic companies will make relevant synchronization with foreign software , Then we use the domestic download address , You can also download relevant software, and the speed will be much faster than that from foreign websites

One 、 yum Source configuration mode

1、 The system is local yum Source

       Usually , stay linux The installation image of the system contains common RPM software package ; Without networking , We can consider using our own local CD as yum Source , Install the relevant required software packages , Local yum The source configuration is as follows :

[[email protected] ~]# mkdir /mnt/dvd // Create the mount point directory of the disc , Later, we will mount our CD image to this directory 
[[email protected] ~]# mount /dev/cdrom /mnt/dvd // Mount the disc image to the mount point Directory 
[[email protected] ~]# rm -rf /etc/yum.repos.d/* // Delete the yum Source configuration file 
 Be careful ：yum The source configuration file must be in .repo ending 
[[email protected] ~]# vi /etc/yum.repo.d/local.repo // To create local yum Source configuration file 
[local]      // Unique identifier , Be careful ： No special characters 
name=centos 	//yum Source description information , You can fill in according to your own situation 
baseurl=file:///mnt/dvd			//yum Software warehouse mount location , Point to our image mount point directory at that time 
enabled=1		// Whether to turn on immediately ,1 For opening ,0 Is not on 
gpgcheck=0				// Check signature ,1 For testing ,0 For not testing 
[[email protected] ~]# yum clean all // eliminate yum cache 
[[email protected] ~]# yum repolist // List available yum Source warehouse rpm Number of bags 

2、 The Internet yum Source （ Alibaba cloud yum Source ）

       Need to connected to the Internet

[[email protected] ~]# rm -rf /etc/yum.repos.d/* // Delete the yum Source configuration file 
[[email protected] ~]# cd /etc/yum.repos.d // Get into yum Folder 
[[email protected] ~]# wget -o Centos.repo http://mirrors.aliyun.com/repo/Centos-7.repo // Use wget Command to download alicloud repo file 
[[email protected] ~]# yum clean all // Clear cache 
[[email protected] ~]# yum makecache // Reload cache 
[[email protected] ~]# yum repolist // List available yum Source warehouse rpm Number of bags 

3、 Customize yum Source

[[email protected] ~]# yum -y install createrepo // install createrepo software package 
[[email protected] ~]# mkdir /other_repo/tools // Create custom yum Warehouse folder 
[[email protected] ~]# mv *.rpm /other_rpeo/tools // Download all you downloaded from the Internet rpm The software package is centralized into customized yum Warehouse folder 
[[email protected] ~]# createrepo /other_repo/tools // Automatically generate warehouse data files according to the software package collection 
[[email protected] ~]# vi /etc/yum.repos.d/centos.repo // add to yum The configuration file 
[tools]  		// Unique identification 
name=this is my tools		// Description information 
baseurl=file:///other_repo/tools		////yum The software warehouse points to custom yum Warehouse 
enabled=1	// Whether to enable... Now ,1 To enable   0 To not enable 
gpgcheck=0		// Whether to detect signature ,1 For testing ,0 For not testing 
[[email protected] ~]# yum clean all // eliminate yum cache 
[[email protected] ~]# yum repolist // List available yum Source warehouse and rpm Number of bags 

Two 、 Self build yum The source server

       During the implementation of the project , Many projects have no external network . here , For our convenience , Can be built locally yum The source server , It can make us install software more conveniently and quickly . And our intranet source server can not only be used for building machines , It can also realize the sharing of the whole intranet server

1、 Build the source server

① Mount the required directory and set the boot auto mount

[[email protected] ~]# mkdir -p /var/www/html // establish apache The default path of the web page 
[[email protected] ~]# cd /var/www/html // Switch to the default path of the web page 
[[email protected] ~]# mkdir centos-1804 other // Create mount directory , Used to mount CDs and package directories 
[[email protected] ~]# mount -t iso9660 -o ro,loop /dev/cdrom /var/www/html/centos-1804 // Mount the local CD to /var/www/html/centos-1804
[[email protected] ~]# mkdir /mnt/tools // Create custom yum Warehouse directory 
[[email protected] ~]# mv *.rpm /mnt/tools // Download all from the Internet rpm Move the package to the custom warehouse Directory 
[[email protected] ~]# mount -t iso9660 -o ro,loop /mnt/tools /var/www/html/other // Mount custom yum Warehouse directory to /var/www/html/other
[[email protected] ~]# vi /etc/rc.d/rc.local // Append the temporarily mounted command to rc.local In file 
mount -t iso9660 -o ro,loop /dev/cdrom	/var/www/html/centos-1804
mount -t iso9660 -o ro,loop /mnt/tools	/var/www/html/other
[[email protected] ~]# chmod +x /etc/rc.d/rc.local // Add executable permissions to files 

② Configure local yum Source

[[email protected] ~]# vi /etc/yum.repo.d/local.repo // To create local yum Source configuration file 
[local]      // Unique identifier , Be careful ： No special characters 
name=centos 	//yum Source description information , You can fill in according to your own situation 
baseurl=file:///var/www/html/centos-1804		//yum Software warehouse mount location , Point to our image mount point directory at that time 
enabled=1		// Whether to turn on immediately ,1 For opening ,0 Is not on 
gpgcheck=0				// Check signature ,1 For testing ,0 For not testing 
[[email protected] ~]# yum clean all // eliminate yum cache 
[[email protected] ~]# yum repolist // List available yum Source warehouse rpm Number of bags 

③ install httpd Software package and set the service to start automatically

[[email protected] ~]# yum -y install httpd // install httpd software package 
[[email protected] ~]# systemctl start httpd // Turn on httpd service 
[[email protected] ~]# systemctl enable httpd // Set up httpd Service starts automatically 

2、 client yum Source configuration mode

[[email protected] ~]# rm -rf /etc/yum.repos.d/* // Delete the yum Source configuration file 
[[email protected] ~]# vi centos.repo // Creating networks yum Source 
[centos-1804]
name=centos-1804
baseurl=http:// The source server ip/centos-1804
enabled=1
gpgcheck=0

[other]
name=other
baseurl=http:// The source server ip/other
enabled=1
gpgcheck=0
[[email protected] ~]# yum clean all // eliminate yum cache 
[[email protected] ~]# yum repolist // List available yum Source warehouse rpm Number of bags 

3、 ... and 、yum Detailed explanation of related commands

command	notes
yum list	Query all installed and installable packages
yum search keyword	from yum Find all packages related to keywords on the source server
yum info Package name	Query the details of the execution package
yum -y install Package name	Install package . If not -y, Each installed software needs to be answered manually yes,-y It means to answer automatically yes
yum -y update Package name	Upgrade package （ Need to ensure yum The version of the package in the source is higher than the version of the package installed locally ）
yum -y remove Package name	Uninstall package ,-y It means that all other software packages that depend on the package will be uninstalled at the same time
yum groupinfo Software group name	Query the packages contained in the software group
yum groupinstall Software group name	Install the specified software group
yum groupremove Software group name	Uninstall the specified software group