100 Days of DevOps — Day 55-Introduction to YUM

Welcome to Day 55 of 100 Days of DevOps, Focus for today is Introduction to YUM

What is YUM?

• Yellowdog Updater Modified
• Resolve one of the major issues with rpm where we need to resolve all the package dependencies
• It acts as a frontend to rpm and handles all dependency issues
• No need to copy rpm locally
• You need to configure repositories(which is a collection of rpm files)to pull rpm(HTTP, FTP, HTTPS, local CD-ROM)

Installing Package with yum

# yum -y install bind

• -y to answer yes automatically

Download the package without installing it

# yum install --downloadonly --downloaddir=/tmp  cloud-init.x86_64
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.cat.pdx.edu
* epel: mirrors.cat.pdx.edu
* extras: mirrors.cat.pdx.edu
* updates: mirrors.cat.pdx.edu
Resolving Dependencies
--> Running transaction check
---> Package cloud-init.x86_64 0:18.2-1.el7.centos.1 will be updated
---> Package cloud-init.x86_64 0:18.2-1.el7.centos.2 will be an update
--> Finished…