Yum package management

Configure network sources

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo

-O Write the document to FILE

Mirror station address ：https://developer.aliyun.com/mirror/?spm=5176.21213303.J_3207526240.55.571453c9MyQ8V5

yum File format

[CentOS7-base]    # Source name , Required 
name=CentOS-$releasever-base  # Source description , Can not fill , But there will be hints 
baseurl=file:///misc/cd/      # Local CD file , There can be multiple addresses . Required 
        https://mirrors.aliyun.com/centos/7.3.1611/os/x86_64/
gpgcheck=1                    # Whether to turn on verification ,yum Check each downloaded RPM Of GnuPG Signature 
enabled=1                     # Whether to enable this warehouse ,1 For use ,0 To disable 
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7     Secret key 
# If open yum Source package verification , You need to import RPM Public key , Here is just that there is no import in the system rpm When to install the public key 
# This is the same thing as rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

yum Package management

yum
 Install only the specified software commands ：yum install <package_name>
 Delete package command ：yum remove <package_name>
 Find package command ：yum search <keyword>
 List all updatable software list commands ：yum check-update
 Update all software commands ：yum update
 Update the specified software command ：yum update <package_name>
 List all installable software list commands ：yum list
 Generate cache ：yum clean all
 Clean cache ：yum makecache
-y：（ When prompted during the installation process, select all as  "yes"）
yum Sleep 
rm -f /var/run/yum.pid

Configure local in the production environment yum

 Local yum To configure 
1. Copy or upload image CentOS-7-x86_64-DVD-1804 To local 

ll /user/local/src/
CentOS-7-x86_64-DVD-1804
2. Mount the image 

 Copy code 
 Mount Directory ：/mnt/iso
mkdir -p /mnt/iso

 mount iso
mount -o loop /usr/local/src/CentOS-7-x86_64-DVD-1804.iso /mnt/iso

 Set power on self start 
vi /etc/fstab
/usr/local/src/CentOS-7-x86_64-DVD-1804.iso /mnt/iso  iso9660 loop,defaults 0 0
 Copy code 
3. Configure and refresh yum
 Offline ：mv -f /etc/yum.repos.d/*  /home/

vim /etc/yum.repos.d/local.repo

[local-yum]
name=Local Repository
baseurl=file:///mnt/iso
 ## The directory is iso Mount Directory 
enabled=1
gpgcheck=0
yum clean all
yum repolist

4. install httpd, Turn off firewall , Browser access http://192.168.10.11:80
 take YUM Source configuration to httpd（Apache Server） in , Other servers can access the... In the intranet through the network YUM Source 

yum -y install httpd
mkdir -p /var/www/html/CentOS-7
cp -r /mnt/iso/ /var/www/html/CentOS-7
 Browser access ：http://192.168.10.11:80/CentOS-7
10.12 Configuration of 
vim /etc/yum.repos.d/local.repo

[local-yum]
name=Local Repository
baseurl=http://192.168.10.11/CentOS-7        ## The directory is iso Mount Directory 
enabled=1
gpgcheck=0
yum clean all
yum repolist